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bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c
mm/bootmem.c contained code paths for both bootmem and no bootmem
configurations. They implement about the same set of APIs in
different ways and as a result bootmem.c contains massive amount of
#ifdef CONFIG_NO_BOOTMEM.
Separate out CONFIG_NO_BOOTMEM code into mm/nobootmem.c. As the
common part is relatively small, duplicate them in nobootmem.c instead
of creating a common file or ifdef'ing in bootmem.c.
The followings are duplicated.
* {min|max}_low_pfn, max_pfn, saved_max_pfn
* free_bootmem_late()
* ___alloc_bootmem()
* __alloc_bootmem_low()
The followings are applicable only to nobootmem and moved verbatim.
* __free_pages_memory()
* free_all_memory_core_early()
The followings are not applicable to nobootmem and omitted in
nobootmem.c.
* reserve_bootmem_node()
* reserve_bootmem()
The rest split function bodies according to CONFIG_NO_BOOTMEM.
Makefile is updated so that only either bootmem.c or nobootmem.c is
built according to CONFIG_NO_BOOTMEM.
This patch doesn't introduce any behavior change.
-tj: Rewrote commit description.
Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Yinghai Lu
Tejun Heo
parent
2bf50555b0
commit
0932587328
@ -7,7 +7,7 @@ mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \
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mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \
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vmalloc.o pagewalk.o pgtable-generic.o
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obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
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obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
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maccess.o page_alloc.o page-writeback.o \
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readahead.o swap.o truncate.o vmscan.o shmem.o \
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prio_tree.o util.o mmzone.o vmstat.o backing-dev.o \
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@ -15,6 +15,12 @@ obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
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$(mmu-y)
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obj-y += init-mm.o
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ifdef CONFIG_NO_BOOTMEM
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obj-y += nobootmem.o
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else
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obj-y += bootmem.o
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endif
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obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o
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obj-$(CONFIG_BOUNCE) += bounce.o
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173
mm/bootmem.c
173
mm/bootmem.c
@ -35,7 +35,6 @@ unsigned long max_pfn;
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unsigned long saved_max_pfn;
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#endif
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#ifndef CONFIG_NO_BOOTMEM
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bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
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static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list);
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@ -146,7 +145,7 @@ unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
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min_low_pfn = start;
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return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
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}
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#endif
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/*
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* free_bootmem_late - free bootmem pages directly to page allocator
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* @addr: starting address of the range
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@ -171,53 +170,6 @@ void __init free_bootmem_late(unsigned long addr, unsigned long size)
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}
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}
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#ifdef CONFIG_NO_BOOTMEM
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static void __init __free_pages_memory(unsigned long start, unsigned long end)
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{
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int i;
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unsigned long start_aligned, end_aligned;
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int order = ilog2(BITS_PER_LONG);
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start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
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end_aligned = end & ~(BITS_PER_LONG - 1);
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if (end_aligned <= start_aligned) {
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for (i = start; i < end; i++)
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__free_pages_bootmem(pfn_to_page(i), 0);
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return;
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}
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for (i = start; i < start_aligned; i++)
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__free_pages_bootmem(pfn_to_page(i), 0);
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for (i = start_aligned; i < end_aligned; i += BITS_PER_LONG)
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__free_pages_bootmem(pfn_to_page(i), order);
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for (i = end_aligned; i < end; i++)
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__free_pages_bootmem(pfn_to_page(i), 0);
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}
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unsigned long __init free_all_memory_core_early(int nodeid)
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{
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int i;
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u64 start, end;
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unsigned long count = 0;
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struct range *range = NULL;
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int nr_range;
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nr_range = get_free_all_memory_range(&range, nodeid);
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for (i = 0; i < nr_range; i++) {
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start = range[i].start;
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end = range[i].end;
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count += end - start;
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__free_pages_memory(start, end);
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}
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return count;
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}
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#else
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static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
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{
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int aligned;
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@ -278,7 +230,6 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
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return count;
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}
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#endif
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/**
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* free_all_bootmem_node - release a node's free pages to the buddy allocator
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@ -289,12 +240,7 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
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unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
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{
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register_page_bootmem_info_node(pgdat);
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#ifdef CONFIG_NO_BOOTMEM
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/* free_all_memory_core_early(MAX_NUMNODES) will be called later */
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return 0;
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#else
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return free_all_bootmem_core(pgdat->bdata);
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#endif
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}
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/**
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@ -304,16 +250,6 @@ unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
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*/
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unsigned long __init free_all_bootmem(void)
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{
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#ifdef CONFIG_NO_BOOTMEM
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/*
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* We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id
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* because in some case like Node0 doesnt have RAM installed
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* low ram will be on Node1
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* Use MAX_NUMNODES will make sure all ranges in early_node_map[]
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* will be used instead of only Node0 related
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*/
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return free_all_memory_core_early(MAX_NUMNODES);
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#else
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unsigned long total_pages = 0;
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bootmem_data_t *bdata;
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@ -321,10 +257,8 @@ unsigned long __init free_all_bootmem(void)
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total_pages += free_all_bootmem_core(bdata);
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return total_pages;
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#endif
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}
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#ifndef CONFIG_NO_BOOTMEM
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static void __init __free(bootmem_data_t *bdata,
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unsigned long sidx, unsigned long eidx)
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{
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@ -419,7 +353,6 @@ static int __init mark_bootmem(unsigned long start, unsigned long end,
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}
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BUG();
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}
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#endif
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/**
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* free_bootmem_node - mark a page range as usable
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@ -434,10 +367,6 @@ static int __init mark_bootmem(unsigned long start, unsigned long end,
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void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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unsigned long size)
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{
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#ifdef CONFIG_NO_BOOTMEM
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kmemleak_free_part(__va(physaddr), size);
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memblock_x86_free_range(physaddr, physaddr + size);
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#else
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unsigned long start, end;
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kmemleak_free_part(__va(physaddr), size);
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@ -446,7 +375,6 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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end = PFN_DOWN(physaddr + size);
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mark_bootmem_node(pgdat->bdata, start, end, 0, 0);
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#endif
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}
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/**
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@ -460,10 +388,6 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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*/
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void __init free_bootmem(unsigned long addr, unsigned long size)
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{
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#ifdef CONFIG_NO_BOOTMEM
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kmemleak_free_part(__va(addr), size);
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memblock_x86_free_range(addr, addr + size);
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#else
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unsigned long start, end;
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kmemleak_free_part(__va(addr), size);
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@ -472,7 +396,6 @@ void __init free_bootmem(unsigned long addr, unsigned long size)
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end = PFN_DOWN(addr + size);
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mark_bootmem(start, end, 0, 0);
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#endif
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}
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/**
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@ -489,17 +412,12 @@ void __init free_bootmem(unsigned long addr, unsigned long size)
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int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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unsigned long size, int flags)
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{
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#ifdef CONFIG_NO_BOOTMEM
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panic("no bootmem");
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return 0;
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#else
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unsigned long start, end;
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start = PFN_DOWN(physaddr);
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end = PFN_UP(physaddr + size);
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return mark_bootmem_node(pgdat->bdata, start, end, 1, flags);
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#endif
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}
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/**
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@ -515,20 +433,14 @@ int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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int __init reserve_bootmem(unsigned long addr, unsigned long size,
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int flags)
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{
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#ifdef CONFIG_NO_BOOTMEM
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panic("no bootmem");
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return 0;
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#else
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unsigned long start, end;
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start = PFN_DOWN(addr);
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end = PFN_UP(addr + size);
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return mark_bootmem(start, end, 1, flags);
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#endif
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}
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#ifndef CONFIG_NO_BOOTMEM
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int __weak __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
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int flags)
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{
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@ -685,33 +597,12 @@ static void * __init alloc_arch_preferred_bootmem(bootmem_data_t *bdata,
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#endif
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return NULL;
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}
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#endif
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static void * __init ___alloc_bootmem_nopanic(unsigned long size,
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unsigned long align,
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unsigned long goal,
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unsigned long limit)
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{
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#ifdef CONFIG_NO_BOOTMEM
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void *ptr;
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if (WARN_ON_ONCE(slab_is_available()))
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return kzalloc(size, GFP_NOWAIT);
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restart:
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ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, goal, limit);
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if (ptr)
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return ptr;
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if (goal != 0) {
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goal = 0;
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goto restart;
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}
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return NULL;
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#else
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bootmem_data_t *bdata;
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void *region;
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@ -737,7 +628,6 @@ restart:
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}
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return NULL;
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#endif
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}
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/**
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@ -758,10 +648,6 @@ void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
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{
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unsigned long limit = 0;
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#ifdef CONFIG_NO_BOOTMEM
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limit = -1UL;
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#endif
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return ___alloc_bootmem_nopanic(size, align, goal, limit);
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}
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@ -798,14 +684,9 @@ void * __init __alloc_bootmem(unsigned long size, unsigned long align,
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{
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unsigned long limit = 0;
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#ifdef CONFIG_NO_BOOTMEM
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limit = -1UL;
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#endif
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return ___alloc_bootmem(size, align, goal, limit);
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}
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#ifndef CONFIG_NO_BOOTMEM
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static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
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unsigned long size, unsigned long align,
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unsigned long goal, unsigned long limit)
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@ -822,7 +703,6 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
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return ___alloc_bootmem(size, align, goal, limit);
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}
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#endif
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/**
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* __alloc_bootmem_node - allocate boot memory from a specific node
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@ -842,24 +722,10 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
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void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
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unsigned long align, unsigned long goal)
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{
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void *ptr;
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if (WARN_ON_ONCE(slab_is_available()))
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return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
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#ifdef CONFIG_NO_BOOTMEM
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ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
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goal, -1ULL);
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if (ptr)
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return ptr;
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ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
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goal, -1ULL);
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#else
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ptr = ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
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#endif
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return ptr;
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return ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
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}
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void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
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@ -880,13 +746,8 @@ void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
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unsigned long new_goal;
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new_goal = MAX_DMA32_PFN << PAGE_SHIFT;
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#ifdef CONFIG_NO_BOOTMEM
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ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
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new_goal, -1ULL);
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#else
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ptr = alloc_bootmem_core(pgdat->bdata, size, align,
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new_goal, 0);
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#endif
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if (ptr)
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return ptr;
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}
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@ -907,16 +768,6 @@ void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
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void * __init alloc_bootmem_section(unsigned long size,
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unsigned long section_nr)
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{
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#ifdef CONFIG_NO_BOOTMEM
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unsigned long pfn, goal, limit;
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pfn = section_nr_to_pfn(section_nr);
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goal = pfn << PAGE_SHIFT;
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limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT;
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return __alloc_memory_core_early(early_pfn_to_nid(pfn), size,
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SMP_CACHE_BYTES, goal, limit);
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#else
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bootmem_data_t *bdata;
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unsigned long pfn, goal, limit;
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@ -926,7 +777,6 @@ void * __init alloc_bootmem_section(unsigned long size,
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bdata = &bootmem_node_data[early_pfn_to_nid(pfn)];
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return alloc_bootmem_core(bdata, size, SMP_CACHE_BYTES, goal, limit);
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#endif
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}
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#endif
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@ -938,16 +788,11 @@ void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
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if (WARN_ON_ONCE(slab_is_available()))
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return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
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#ifdef CONFIG_NO_BOOTMEM
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ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
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goal, -1ULL);
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#else
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ptr = alloc_arch_preferred_bootmem(pgdat->bdata, size, align, goal, 0);
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if (ptr)
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return ptr;
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ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
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#endif
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if (ptr)
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return ptr;
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@ -995,21 +840,9 @@ void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
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void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
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unsigned long align, unsigned long goal)
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{
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void *ptr;
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if (WARN_ON_ONCE(slab_is_available()))
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return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
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#ifdef CONFIG_NO_BOOTMEM
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ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
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return ___alloc_bootmem_node(pgdat->bdata, size, align,
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goal, ARCH_LOW_ADDRESS_LIMIT);
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if (ptr)
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return ptr;
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ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
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goal, ARCH_LOW_ADDRESS_LIMIT);
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#else
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ptr = ___alloc_bootmem_node(pgdat->bdata, size, align,
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goal, ARCH_LOW_ADDRESS_LIMIT);
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#endif
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return ptr;
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}
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405
mm/nobootmem.c
Normal file
405
mm/nobootmem.c
Normal file
@ -0,0 +1,405 @@
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/*
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* bootmem - A boot-time physical memory allocator and configurator
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*
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* Copyright (C) 1999 Ingo Molnar
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* 1999 Kanoj Sarcar, SGI
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* 2008 Johannes Weiner
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*
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* Access to this subsystem has to be serialized externally (which is true
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* for the boot process anyway).
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*/
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#include <linux/init.h>
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#include <linux/pfn.h>
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#include <linux/slab.h>
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#include <linux/bootmem.h>
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#include <linux/module.h>
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#include <linux/kmemleak.h>
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#include <linux/range.h>
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#include <linux/memblock.h>
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#include <asm/bug.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include "internal.h"
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unsigned long max_low_pfn;
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unsigned long min_low_pfn;
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unsigned long max_pfn;
|
||||
|
||||
#ifdef CONFIG_CRASH_DUMP
|
||||
/*
|
||||
* If we have booted due to a crash, max_pfn will be a very low value. We need
|
||||
* to know the amount of memory that the previous kernel used.
|
||||
*/
|
||||
unsigned long saved_max_pfn;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* free_bootmem_late - free bootmem pages directly to page allocator
|
||||
* @addr: starting address of the range
|
||||
* @size: size of the range in bytes
|
||||
*
|
||||
* This is only useful when the bootmem allocator has already been torn
|
||||
* down, but we are still initializing the system. Pages are given directly
|
||||
* to the page allocator, no bootmem metadata is updated because it is gone.
|
||||
*/
|
||||
void __init free_bootmem_late(unsigned long addr, unsigned long size)
|
||||
{
|
||||
unsigned long cursor, end;
|
||||
|
||||
kmemleak_free_part(__va(addr), size);
|
||||
|
||||
cursor = PFN_UP(addr);
|
||||
end = PFN_DOWN(addr + size);
|
||||
|
||||
for (; cursor < end; cursor++) {
|
||||
__free_pages_bootmem(pfn_to_page(cursor), 0);
|
||||
totalram_pages++;
|
||||
}
|
||||
}
|
||||
|
||||
static void __init __free_pages_memory(unsigned long start, unsigned long end)
|
||||
{
|
||||
int i;
|
||||
unsigned long start_aligned, end_aligned;
|
||||
int order = ilog2(BITS_PER_LONG);
|
||||
|
||||
start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
|
||||
end_aligned = end & ~(BITS_PER_LONG - 1);
|
||||
|
||||
if (end_aligned <= start_aligned) {
|
||||
for (i = start; i < end; i++)
|
||||
__free_pages_bootmem(pfn_to_page(i), 0);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
for (i = start; i < start_aligned; i++)
|
||||
__free_pages_bootmem(pfn_to_page(i), 0);
|
||||
|
||||
for (i = start_aligned; i < end_aligned; i += BITS_PER_LONG)
|
||||
__free_pages_bootmem(pfn_to_page(i), order);
|
||||
|
||||
for (i = end_aligned; i < end; i++)
|
||||
__free_pages_bootmem(pfn_to_page(i), 0);
|
||||
}
|
||||
|
||||
unsigned long __init free_all_memory_core_early(int nodeid)
|
||||
{
|
||||
int i;
|
||||
u64 start, end;
|
||||
unsigned long count = 0;
|
||||
struct range *range = NULL;
|
||||
int nr_range;
|
||||
|
||||
nr_range = get_free_all_memory_range(&range, nodeid);
|
||||
|
||||
for (i = 0; i < nr_range; i++) {
|
||||
start = range[i].start;
|
||||
end = range[i].end;
|
||||
count += end - start;
|
||||
__free_pages_memory(start, end);
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
/**
|
||||
* free_all_bootmem_node - release a node's free pages to the buddy allocator
|
||||
* @pgdat: node to be released
|
||||
*
|
||||
* Returns the number of pages actually released.
|
||||
*/
|
||||
unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
|
||||
{
|
||||
register_page_bootmem_info_node(pgdat);
|
||||
|
||||
/* free_all_memory_core_early(MAX_NUMNODES) will be called later */
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* free_all_bootmem - release free pages to the buddy allocator
|
||||
*
|
||||
* Returns the number of pages actually released.
|
||||
*/
|
||||
unsigned long __init free_all_bootmem(void)
|
||||
{
|
||||
/*
|
||||
* We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id
|
||||
* because in some case like Node0 doesnt have RAM installed
|
||||
* low ram will be on Node1
|
||||
* Use MAX_NUMNODES will make sure all ranges in early_node_map[]
|
||||
* will be used instead of only Node0 related
|
||||
*/
|
||||
return free_all_memory_core_early(MAX_NUMNODES);
|
||||
}
|
||||
|
||||
/**
|
||||
* free_bootmem_node - mark a page range as usable
|
||||
* @pgdat: node the range resides on
|
||||
* @physaddr: starting address of the range
|
||||
* @size: size of the range in bytes
|
||||
*
|
||||
* Partial pages will be considered reserved and left as they are.
|
||||
*
|
||||
* The range must reside completely on the specified node.
|
||||
*/
|
||||
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
|
||||
unsigned long size)
|
||||
{
|
||||
kmemleak_free_part(__va(physaddr), size);
|
||||
memblock_x86_free_range(physaddr, physaddr + size);
|
||||
}
|
||||
|
||||
/**
|
||||
* free_bootmem - mark a page range as usable
|
||||
* @addr: starting address of the range
|
||||
* @size: size of the range in bytes
|
||||
*
|
||||
* Partial pages will be considered reserved and left as they are.
|
||||
*
|
||||
* The range must be contiguous but may span node boundaries.
|
||||
*/
|
||||
void __init free_bootmem(unsigned long addr, unsigned long size)
|
||||
{
|
||||
kmemleak_free_part(__va(addr), size);
|
||||
memblock_x86_free_range(addr, addr + size);
|
||||
}
|
||||
|
||||
static void * __init ___alloc_bootmem_nopanic(unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal,
|
||||
unsigned long limit)
|
||||
{
|
||||
void *ptr;
|
||||
|
||||
if (WARN_ON_ONCE(slab_is_available()))
|
||||
return kzalloc(size, GFP_NOWAIT);
|
||||
|
||||
restart:
|
||||
|
||||
ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, goal, limit);
|
||||
|
||||
if (ptr)
|
||||
return ptr;
|
||||
|
||||
if (goal != 0) {
|
||||
goal = 0;
|
||||
goto restart;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* __alloc_bootmem_nopanic - allocate boot memory without panicking
|
||||
* @size: size of the request in bytes
|
||||
* @align: alignment of the region
|
||||
* @goal: preferred starting address of the region
|
||||
*
|
||||
* The goal is dropped if it can not be satisfied and the allocation will
|
||||
* fall back to memory below @goal.
|
||||
*
|
||||
* Allocation may happen on any node in the system.
|
||||
*
|
||||
* Returns NULL on failure.
|
||||
*/
|
||||
void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
|
||||
unsigned long goal)
|
||||
{
|
||||
unsigned long limit = -1UL;
|
||||
|
||||
return ___alloc_bootmem_nopanic(size, align, goal, limit);
|
||||
}
|
||||
|
||||
static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
|
||||
unsigned long goal, unsigned long limit)
|
||||
{
|
||||
void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
|
||||
|
||||
if (mem)
|
||||
return mem;
|
||||
/*
|
||||
* Whoops, we cannot satisfy the allocation request.
|
||||
*/
|
||||
printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
|
||||
panic("Out of memory");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* __alloc_bootmem - allocate boot memory
|
||||
* @size: size of the request in bytes
|
||||
* @align: alignment of the region
|
||||
* @goal: preferred starting address of the region
|
||||
*
|
||||
* The goal is dropped if it can not be satisfied and the allocation will
|
||||
* fall back to memory below @goal.
|
||||
*
|
||||
* Allocation may happen on any node in the system.
|
||||
*
|
||||
* The function panics if the request can not be satisfied.
|
||||
*/
|
||||
void * __init __alloc_bootmem(unsigned long size, unsigned long align,
|
||||
unsigned long goal)
|
||||
{
|
||||
unsigned long limit = -1UL;
|
||||
|
||||
return ___alloc_bootmem(size, align, goal, limit);
|
||||
}
|
||||
|
||||
/**
|
||||
* __alloc_bootmem_node - allocate boot memory from a specific node
|
||||
* @pgdat: node to allocate from
|
||||
* @size: size of the request in bytes
|
||||
* @align: alignment of the region
|
||||
* @goal: preferred starting address of the region
|
||||
*
|
||||
* The goal is dropped if it can not be satisfied and the allocation will
|
||||
* fall back to memory below @goal.
|
||||
*
|
||||
* Allocation may fall back to any node in the system if the specified node
|
||||
* can not hold the requested memory.
|
||||
*
|
||||
* The function panics if the request can not be satisfied.
|
||||
*/
|
||||
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
|
||||
unsigned long align, unsigned long goal)
|
||||
{
|
||||
void *ptr;
|
||||
|
||||
if (WARN_ON_ONCE(slab_is_available()))
|
||||
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
|
||||
|
||||
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
|
||||
goal, -1ULL);
|
||||
if (ptr)
|
||||
return ptr;
|
||||
|
||||
return __alloc_memory_core_early(MAX_NUMNODES, size, align,
|
||||
goal, -1ULL);
|
||||
}
|
||||
|
||||
void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
|
||||
unsigned long align, unsigned long goal)
|
||||
{
|
||||
#ifdef MAX_DMA32_PFN
|
||||
unsigned long end_pfn;
|
||||
|
||||
if (WARN_ON_ONCE(slab_is_available()))
|
||||
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
|
||||
|
||||
/* update goal according ...MAX_DMA32_PFN */
|
||||
end_pfn = pgdat->node_start_pfn + pgdat->node_spanned_pages;
|
||||
|
||||
if (end_pfn > MAX_DMA32_PFN + (128 >> (20 - PAGE_SHIFT)) &&
|
||||
(goal >> PAGE_SHIFT) < MAX_DMA32_PFN) {
|
||||
void *ptr;
|
||||
unsigned long new_goal;
|
||||
|
||||
new_goal = MAX_DMA32_PFN << PAGE_SHIFT;
|
||||
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
|
||||
new_goal, -1ULL);
|
||||
if (ptr)
|
||||
return ptr;
|
||||
}
|
||||
#endif
|
||||
|
||||
return __alloc_bootmem_node(pgdat, size, align, goal);
|
||||
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SPARSEMEM
|
||||
/**
|
||||
* alloc_bootmem_section - allocate boot memory from a specific section
|
||||
* @size: size of the request in bytes
|
||||
* @section_nr: sparse map section to allocate from
|
||||
*
|
||||
* Return NULL on failure.
|
||||
*/
|
||||
void * __init alloc_bootmem_section(unsigned long size,
|
||||
unsigned long section_nr)
|
||||
{
|
||||
unsigned long pfn, goal, limit;
|
||||
|
||||
pfn = section_nr_to_pfn(section_nr);
|
||||
goal = pfn << PAGE_SHIFT;
|
||||
limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT;
|
||||
|
||||
return __alloc_memory_core_early(early_pfn_to_nid(pfn), size,
|
||||
SMP_CACHE_BYTES, goal, limit);
|
||||
}
|
||||
#endif
|
||||
|
||||
void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
|
||||
unsigned long align, unsigned long goal)
|
||||
{
|
||||
void *ptr;
|
||||
|
||||
if (WARN_ON_ONCE(slab_is_available()))
|
||||
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
|
||||
|
||||
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
|
||||
goal, -1ULL);
|
||||
if (ptr)
|
||||
return ptr;
|
||||
|
||||
return __alloc_bootmem_nopanic(size, align, goal);
|
||||
}
|
||||
|
||||
#ifndef ARCH_LOW_ADDRESS_LIMIT
|
||||
#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
|
||||
#endif
|
||||
|
||||
/**
|
||||
* __alloc_bootmem_low - allocate low boot memory
|
||||
* @size: size of the request in bytes
|
||||
* @align: alignment of the region
|
||||
* @goal: preferred starting address of the region
|
||||
*
|
||||
* The goal is dropped if it can not be satisfied and the allocation will
|
||||
* fall back to memory below @goal.
|
||||
*
|
||||
* Allocation may happen on any node in the system.
|
||||
*
|
||||
* The function panics if the request can not be satisfied.
|
||||
*/
|
||||
void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
|
||||
unsigned long goal)
|
||||
{
|
||||
return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
|
||||
}
|
||||
|
||||
/**
|
||||
* __alloc_bootmem_low_node - allocate low boot memory from a specific node
|
||||
* @pgdat: node to allocate from
|
||||
* @size: size of the request in bytes
|
||||
* @align: alignment of the region
|
||||
* @goal: preferred starting address of the region
|
||||
*
|
||||
* The goal is dropped if it can not be satisfied and the allocation will
|
||||
* fall back to memory below @goal.
|
||||
*
|
||||
* Allocation may fall back to any node in the system if the specified node
|
||||
* can not hold the requested memory.
|
||||
*
|
||||
* The function panics if the request can not be satisfied.
|
||||
*/
|
||||
void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
|
||||
unsigned long align, unsigned long goal)
|
||||
{
|
||||
void *ptr;
|
||||
|
||||
if (WARN_ON_ONCE(slab_is_available()))
|
||||
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
|
||||
|
||||
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
|
||||
goal, ARCH_LOW_ADDRESS_LIMIT);
|
||||
if (ptr)
|
||||
return ptr;
|
||||
|
||||
return __alloc_memory_core_early(MAX_NUMNODES, size, align,
|
||||
goal, ARCH_LOW_ADDRESS_LIMIT);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user