forked from Minki/linux
mm: fix typos in comments
Fix ~94 single-word typos in locking code comments, plus a few very obvious grammar mistakes. Link: https://lkml.kernel.org/r/20210322212624.GA1963421@gmail.com Link: https://lore.kernel.org/r/20210322205203.GB1959563@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Cc: Bhaskar Chowdhury <unixbhaskar@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ingo Molnar
Linus Torvalds
parent
fa60ce2cb4
commit
f0953a1bba
@ -106,7 +106,7 @@ extern int mmap_rnd_compat_bits __read_mostly;
|
||||
* embedding these tags into addresses that point to these memory regions, and
|
||||
* checking that the memory and the pointer tags match on memory accesses)
|
||||
* redefine this macro to strip tags from pointers.
|
||||
* It's defined as noop for arcitectures that don't support memory tagging.
|
||||
* It's defined as noop for architectures that don't support memory tagging.
|
||||
*/
|
||||
#ifndef untagged_addr
|
||||
#define untagged_addr(addr) (addr)
|
||||
|
||||
@ -33,7 +33,7 @@ struct notifier_block; /* in notifier.h */
|
||||
*
|
||||
* If IS_ENABLED(CONFIG_KASAN_VMALLOC), VM_KASAN is set on a vm_struct after
|
||||
* shadow memory has been mapped. It's used to handle allocation errors so that
|
||||
* we don't try to poision shadow on free if it was never allocated.
|
||||
* we don't try to poison shadow on free if it was never allocated.
|
||||
*
|
||||
* Otherwise, VM_KASAN is set for kasan_module_alloc() allocations and used to
|
||||
* determine which allocations need the module shadow freed.
|
||||
@ -43,7 +43,7 @@ struct notifier_block; /* in notifier.h */
|
||||
|
||||
/*
|
||||
* Maximum alignment for ioremap() regions.
|
||||
* Can be overriden by arch-specific value.
|
||||
* Can be overridden by arch-specific value.
|
||||
*/
|
||||
#ifndef IOREMAP_MAX_ORDER
|
||||
#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
|
||||
|
||||
@ -58,7 +58,7 @@ EXPORT_SYMBOL_GPL(balloon_page_list_enqueue);
|
||||
/**
|
||||
* balloon_page_list_dequeue() - removes pages from balloon's page list and
|
||||
* returns a list of the pages.
|
||||
* @b_dev_info: balloon device decriptor where we will grab a page from.
|
||||
* @b_dev_info: balloon device descriptor where we will grab a page from.
|
||||
* @pages: pointer to the list of pages that would be returned to the caller.
|
||||
* @n_req_pages: number of requested pages.
|
||||
*
|
||||
@ -157,7 +157,7 @@ EXPORT_SYMBOL_GPL(balloon_page_enqueue);
|
||||
/*
|
||||
* balloon_page_dequeue - removes a page from balloon's page list and returns
|
||||
* its address to allow the driver to release the page.
|
||||
* @b_dev_info: balloon device decriptor where we will grab a page from.
|
||||
* @b_dev_info: balloon device descriptor where we will grab a page from.
|
||||
*
|
||||
* Driver must call this function to properly dequeue a previously enqueued page
|
||||
* before definitively releasing it back to the guest system.
|
||||
|
||||
@ -2012,8 +2012,8 @@ static unsigned int fragmentation_score_wmark(pg_data_t *pgdat, bool low)
|
||||
unsigned int wmark_low;
|
||||
|
||||
/*
|
||||
* Cap the low watermak to avoid excessive compaction
|
||||
* activity in case a user sets the proactivess tunable
|
||||
* Cap the low watermark to avoid excessive compaction
|
||||
* activity in case a user sets the proactiveness tunable
|
||||
* close to 100 (maximum).
|
||||
*/
|
||||
wmark_low = max(100U - sysctl_compaction_proactiveness, 5U);
|
||||
|
||||
@ -2755,7 +2755,7 @@ unsigned int seek_page_size(struct xa_state *xas, struct page *page)
|
||||
* entirely memory-based such as tmpfs, and filesystems which support
|
||||
* unwritten extents.
|
||||
*
|
||||
* Return: The requested offset on successs, or -ENXIO if @whence specifies
|
||||
* Return: The requested offset on success, or -ENXIO if @whence specifies
|
||||
* SEEK_DATA and there is no data after @start. There is an implicit hole
|
||||
* after @end - 1, so SEEK_HOLE returns @end if all the bytes between @start
|
||||
* and @end contain data.
|
||||
|
||||
2
mm/gup.c
2
mm/gup.c
@ -1575,7 +1575,7 @@ finish_or_fault:
|
||||
* Returns NULL on any kind of failure - a hole must then be inserted into
|
||||
* the corefile, to preserve alignment with its headers; and also returns
|
||||
* NULL wherever the ZERO_PAGE, or an anonymous pte_none, has been found -
|
||||
* allowing a hole to be left in the corefile to save diskspace.
|
||||
* allowing a hole to be left in the corefile to save disk space.
|
||||
*
|
||||
* Called without mmap_lock (takes and releases the mmap_lock by itself).
|
||||
*/
|
||||
|
||||
@ -519,7 +519,7 @@ void *__kmap_local_pfn_prot(unsigned long pfn, pgprot_t prot)
|
||||
|
||||
/*
|
||||
* Disable migration so resulting virtual address is stable
|
||||
* accross preemption.
|
||||
* across preemption.
|
||||
*/
|
||||
migrate_disable();
|
||||
preempt_disable();
|
||||
|
||||
@ -1792,8 +1792,8 @@ bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr,
|
||||
/*
|
||||
* Returns
|
||||
* - 0 if PMD could not be locked
|
||||
* - 1 if PMD was locked but protections unchange and TLB flush unnecessary
|
||||
* - HPAGE_PMD_NR is protections changed and TLB flush necessary
|
||||
* - 1 if PMD was locked but protections unchanged and TLB flush unnecessary
|
||||
* - HPAGE_PMD_NR if protections changed and TLB flush necessary
|
||||
*/
|
||||
int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
|
||||
unsigned long addr, pgprot_t newprot, unsigned long cp_flags)
|
||||
@ -2469,7 +2469,7 @@ static void __split_huge_page(struct page *page, struct list_head *list,
|
||||
xa_lock(&swap_cache->i_pages);
|
||||
}
|
||||
|
||||
/* lock lru list/PageCompound, ref freezed by page_ref_freeze */
|
||||
/* lock lru list/PageCompound, ref frozen by page_ref_freeze */
|
||||
lruvec = lock_page_lruvec(head);
|
||||
|
||||
for (i = nr - 1; i >= 1; i--) {
|
||||
|
||||
@ -466,7 +466,7 @@ static int allocate_file_region_entries(struct resv_map *resv,
|
||||
resv->region_cache_count;
|
||||
|
||||
/* At this point, we should have enough entries in the cache
|
||||
* for all the existings adds_in_progress. We should only be
|
||||
* for all the existing adds_in_progress. We should only be
|
||||
* needing to allocate for regions_needed.
|
||||
*/
|
||||
VM_BUG_ON(resv->region_cache_count < resv->adds_in_progress);
|
||||
@ -5536,8 +5536,8 @@ void adjust_range_if_pmd_sharing_possible(struct vm_area_struct *vma,
|
||||
v_end = ALIGN_DOWN(vma->vm_end, PUD_SIZE);
|
||||
|
||||
/*
|
||||
* vma need span at least one aligned PUD size and the start,end range
|
||||
* must at least partialy within it.
|
||||
* vma needs to span at least one aligned PUD size, and the range
|
||||
* must be at least partially within in.
|
||||
*/
|
||||
if (!(vma->vm_flags & VM_MAYSHARE) || !(v_end > v_start) ||
|
||||
(*end <= v_start) || (*start >= v_end))
|
||||
|
||||
@ -334,7 +334,7 @@ static inline bool is_exec_mapping(vm_flags_t flags)
|
||||
}
|
||||
|
||||
/*
|
||||
* Stack area - atomatically grows in one direction
|
||||
* Stack area - automatically grows in one direction
|
||||
*
|
||||
* VM_GROWSUP / VM_GROWSDOWN VMAs are always private anonymous:
|
||||
* do_mmap() forbids all other combinations.
|
||||
|
||||
@ -55,9 +55,9 @@ extern bool kasan_flag_async __ro_after_init;
|
||||
#define KASAN_TAG_MAX 0xFD /* maximum value for random tags */
|
||||
|
||||
#ifdef CONFIG_KASAN_HW_TAGS
|
||||
#define KASAN_TAG_MIN 0xF0 /* mimimum value for random tags */
|
||||
#define KASAN_TAG_MIN 0xF0 /* minimum value for random tags */
|
||||
#else
|
||||
#define KASAN_TAG_MIN 0x00 /* mimimum value for random tags */
|
||||
#define KASAN_TAG_MIN 0x00 /* minimum value for random tags */
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_KASAN_GENERIC
|
||||
@ -403,7 +403,7 @@ static inline bool kasan_byte_accessible(const void *addr)
|
||||
#else /* CONFIG_KASAN_HW_TAGS */
|
||||
|
||||
/**
|
||||
* kasan_poison - mark the memory range as unaccessible
|
||||
* kasan_poison - mark the memory range as inaccessible
|
||||
* @addr - range start address, must be aligned to KASAN_GRANULE_SIZE
|
||||
* @size - range size, must be aligned to KASAN_GRANULE_SIZE
|
||||
* @value - value that's written to metadata for the range
|
||||
@ -434,7 +434,7 @@ bool kasan_byte_accessible(const void *addr);
|
||||
|
||||
/**
|
||||
* kasan_poison_last_granule - mark the last granule of the memory range as
|
||||
* unaccessible
|
||||
* inaccessible
|
||||
* @addr - range start address, must be aligned to KASAN_GRANULE_SIZE
|
||||
* @size - range size
|
||||
*
|
||||
|
||||
@ -27,7 +27,7 @@
|
||||
/* Data structure and operations for quarantine queues. */
|
||||
|
||||
/*
|
||||
* Each queue is a signle-linked list, which also stores the total size of
|
||||
* Each queue is a single-linked list, which also stores the total size of
|
||||
* objects inside of it.
|
||||
*/
|
||||
struct qlist_head {
|
||||
@ -138,7 +138,7 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache)
|
||||
local_irq_save(flags);
|
||||
|
||||
/*
|
||||
* As the object now gets freed from the quaratine, assume that its
|
||||
* As the object now gets freed from the quarantine, assume that its
|
||||
* free track is no longer valid.
|
||||
*/
|
||||
*(u8 *)kasan_mem_to_shadow(object) = KASAN_KMALLOC_FREE;
|
||||
|
||||
@ -316,7 +316,7 @@ int kasan_populate_vmalloc(unsigned long addr, unsigned long size)
|
||||
* // rest of vmalloc process <data dependency>
|
||||
* STORE p, a LOAD shadow(x+99)
|
||||
*
|
||||
* If there is no barrier between the end of unpoisioning the shadow
|
||||
* If there is no barrier between the end of unpoisoning the shadow
|
||||
* and the store of the result to p, the stores could be committed
|
||||
* in a different order by CPU#0, and CPU#1 could erroneously observe
|
||||
* poison in the shadow.
|
||||
@ -384,7 +384,7 @@ static int kasan_depopulate_vmalloc_pte(pte_t *ptep, unsigned long addr,
|
||||
* How does this work?
|
||||
* -------------------
|
||||
*
|
||||
* We have a region that is page aligned, labelled as A.
|
||||
* We have a region that is page aligned, labeled as A.
|
||||
* That might not map onto the shadow in a way that is page-aligned:
|
||||
*
|
||||
* start end
|
||||
|
||||
@ -263,6 +263,6 @@ void kfence_report_error(unsigned long address, bool is_write, struct pt_regs *r
|
||||
if (panic_on_warn)
|
||||
panic("panic_on_warn set ...\n");
|
||||
|
||||
/* We encountered a memory unsafety error, taint the kernel! */
|
||||
/* We encountered a memory safety error, taint the kernel! */
|
||||
add_taint(TAINT_BAD_PAGE, LOCKDEP_STILL_OK);
|
||||
}
|
||||
|
||||
@ -667,7 +667,7 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
|
||||
*
|
||||
* The page table that maps the page has been already unlinked
|
||||
* from the page table tree and this process cannot get
|
||||
* an additinal pin on the page.
|
||||
* an additional pin on the page.
|
||||
*
|
||||
* New pins can come later if the page is shared across fork,
|
||||
* but not from this process. The other process cannot write to
|
||||
|
||||
4
mm/ksm.c
4
mm/ksm.c
@ -1065,7 +1065,7 @@ static int write_protect_page(struct vm_area_struct *vma, struct page *page,
|
||||
/*
|
||||
* Ok this is tricky, when get_user_pages_fast() run it doesn't
|
||||
* take any lock, therefore the check that we are going to make
|
||||
* with the pagecount against the mapcount is racey and
|
||||
* with the pagecount against the mapcount is racy and
|
||||
* O_DIRECT can happen right after the check.
|
||||
* So we clear the pte and flush the tlb before the check
|
||||
* this assure us that no O_DIRECT can happen after the check
|
||||
@ -1435,7 +1435,7 @@ static struct page *stable_node_dup(struct stable_node **_stable_node_dup,
|
||||
*/
|
||||
*_stable_node = found;
|
||||
/*
|
||||
* Just for robustneess as stable_node is
|
||||
* Just for robustness, as stable_node is
|
||||
* otherwise left as a stable pointer, the
|
||||
* compiler shall optimize it away at build
|
||||
* time.
|
||||
|
||||
@ -799,7 +799,7 @@ static long madvise_dontneed_free(struct vm_area_struct *vma,
|
||||
if (end > vma->vm_end) {
|
||||
/*
|
||||
* Don't fail if end > vma->vm_end. If the old
|
||||
* vma was splitted while the mmap_lock was
|
||||
* vma was split while the mmap_lock was
|
||||
* released the effect of the concurrent
|
||||
* operation may not cause madvise() to
|
||||
* have an undefined result. There may be an
|
||||
@ -1039,7 +1039,7 @@ process_madvise_behavior_valid(int behavior)
|
||||
* MADV_DODUMP - cancel MADV_DONTDUMP: no longer exclude from core dump.
|
||||
* MADV_COLD - the application is not expected to use this memory soon,
|
||||
* deactivate pages in this range so that they can be reclaimed
|
||||
* easily if memory pressure hanppens.
|
||||
* easily if memory pressure happens.
|
||||
* MADV_PAGEOUT - the application is not expected to use this memory soon,
|
||||
* page out the pages in this range immediately.
|
||||
*
|
||||
|
||||
@ -215,7 +215,7 @@ enum res_type {
|
||||
#define MEMFILE_PRIVATE(x, val) ((x) << 16 | (val))
|
||||
#define MEMFILE_TYPE(val) ((val) >> 16 & 0xffff)
|
||||
#define MEMFILE_ATTR(val) ((val) & 0xffff)
|
||||
/* Used for OOM nofiier */
|
||||
/* Used for OOM notifier */
|
||||
#define OOM_CONTROL (0)
|
||||
|
||||
/*
|
||||
@ -786,7 +786,7 @@ void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val)
|
||||
* __count_memcg_events - account VM events in a cgroup
|
||||
* @memcg: the memory cgroup
|
||||
* @idx: the event item
|
||||
* @count: the number of events that occured
|
||||
* @count: the number of events that occurred
|
||||
*/
|
||||
void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx,
|
||||
unsigned long count)
|
||||
@ -904,7 +904,7 @@ struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm)
|
||||
rcu_read_lock();
|
||||
do {
|
||||
/*
|
||||
* Page cache insertions can happen withou an
|
||||
* Page cache insertions can happen without an
|
||||
* actual mm context, e.g. during disk probing
|
||||
* on boot, loopback IO, acct() writes etc.
|
||||
*/
|
||||
@ -1712,7 +1712,7 @@ static void mem_cgroup_unmark_under_oom(struct mem_cgroup *memcg)
|
||||
struct mem_cgroup *iter;
|
||||
|
||||
/*
|
||||
* Be careful about under_oom underflows becase a child memcg
|
||||
* Be careful about under_oom underflows because a child memcg
|
||||
* could have been added after mem_cgroup_mark_under_oom.
|
||||
*/
|
||||
spin_lock(&memcg_oom_lock);
|
||||
@ -1884,7 +1884,7 @@ bool mem_cgroup_oom_synchronize(bool handle)
|
||||
/*
|
||||
* There is no guarantee that an OOM-lock contender
|
||||
* sees the wakeups triggered by the OOM kill
|
||||
* uncharges. Wake any sleepers explicitely.
|
||||
* uncharges. Wake any sleepers explicitly.
|
||||
*/
|
||||
memcg_oom_recover(memcg);
|
||||
}
|
||||
@ -4364,7 +4364,7 @@ void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
|
||||
* Foreign dirty flushing
|
||||
*
|
||||
* There's an inherent mismatch between memcg and writeback. The former
|
||||
* trackes ownership per-page while the latter per-inode. This was a
|
||||
* tracks ownership per-page while the latter per-inode. This was a
|
||||
* deliberate design decision because honoring per-page ownership in the
|
||||
* writeback path is complicated, may lead to higher CPU and IO overheads
|
||||
* and deemed unnecessary given that write-sharing an inode across
|
||||
@ -4379,9 +4379,9 @@ void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
|
||||
* triggering background writeback. A will be slowed down without a way to
|
||||
* make writeback of the dirty pages happen.
|
||||
*
|
||||
* Conditions like the above can lead to a cgroup getting repatedly and
|
||||
* Conditions like the above can lead to a cgroup getting repeatedly and
|
||||
* severely throttled after making some progress after each
|
||||
* dirty_expire_interval while the underyling IO device is almost
|
||||
* dirty_expire_interval while the underlying IO device is almost
|
||||
* completely idle.
|
||||
*
|
||||
* Solving this problem completely requires matching the ownership tracking
|
||||
@ -5774,7 +5774,7 @@ static int mem_cgroup_can_attach(struct cgroup_taskset *tset)
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* We are now commited to this value whatever it is. Changes in this
|
||||
* We are now committed to this value whatever it is. Changes in this
|
||||
* tunable will only affect upcoming migrations, not the current one.
|
||||
* So we need to save it, and keep it going.
|
||||
*/
|
||||
|
||||
@ -75,7 +75,7 @@ static bool page_handle_poison(struct page *page, bool hugepage_or_freepage, boo
|
||||
if (dissolve_free_huge_page(page) || !take_page_off_buddy(page))
|
||||
/*
|
||||
* We could fail to take off the target page from buddy
|
||||
* for example due to racy page allocaiton, but that's
|
||||
* for example due to racy page allocation, but that's
|
||||
* acceptable because soft-offlined page is not broken
|
||||
* and if someone really want to use it, they should
|
||||
* take it.
|
||||
|
||||
10
mm/memory.c
10
mm/memory.c
@ -3727,7 +3727,7 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* Archs like ppc64 need additonal space to store information
|
||||
* Archs like ppc64 need additional space to store information
|
||||
* related to pte entry. Use the preallocated table for that.
|
||||
*/
|
||||
if (arch_needs_pgtable_deposit() && !vmf->prealloc_pte) {
|
||||
@ -4503,7 +4503,7 @@ retry_pud:
|
||||
}
|
||||
|
||||
/**
|
||||
* mm_account_fault - Do page fault accountings
|
||||
* mm_account_fault - Do page fault accounting
|
||||
*
|
||||
* @regs: the pt_regs struct pointer. When set to NULL, will skip accounting
|
||||
* of perf event counters, but we'll still do the per-task accounting to
|
||||
@ -4512,9 +4512,9 @@ retry_pud:
|
||||
* @flags: the fault flags.
|
||||
* @ret: the fault retcode.
|
||||
*
|
||||
* This will take care of most of the page fault accountings. Meanwhile, it
|
||||
* This will take care of most of the page fault accounting. Meanwhile, it
|
||||
* will also include the PERF_COUNT_SW_PAGE_FAULTS_[MAJ|MIN] perf counter
|
||||
* updates. However note that the handling of PERF_COUNT_SW_PAGE_FAULTS should
|
||||
* updates. However, note that the handling of PERF_COUNT_SW_PAGE_FAULTS should
|
||||
* still be in per-arch page fault handlers at the entry of page fault.
|
||||
*/
|
||||
static inline void mm_account_fault(struct pt_regs *regs,
|
||||
@ -4848,7 +4848,7 @@ out:
|
||||
/**
|
||||
* generic_access_phys - generic implementation for iomem mmap access
|
||||
* @vma: the vma to access
|
||||
* @addr: userspace addres, not relative offset within @vma
|
||||
* @addr: userspace address, not relative offset within @vma
|
||||
* @buf: buffer to read/write
|
||||
* @len: length of transfer
|
||||
* @write: set to FOLL_WRITE when writing, otherwise reading
|
||||
|
||||
@ -1867,7 +1867,7 @@ static int apply_policy_zone(struct mempolicy *policy, enum zone_type zone)
|
||||
* we apply policy when gfp_zone(gfp) = ZONE_MOVABLE only.
|
||||
*
|
||||
* policy->v.nodes is intersect with node_states[N_MEMORY].
|
||||
* so if the following test faile, it implies
|
||||
* so if the following test fails, it implies
|
||||
* policy->v.nodes has movable memory only.
|
||||
*/
|
||||
if (!nodes_intersects(policy->v.nodes, node_states[N_HIGH_MEMORY]))
|
||||
@ -2098,7 +2098,7 @@ bool init_nodemask_of_mempolicy(nodemask_t *mask)
|
||||
*
|
||||
* If tsk's mempolicy is "default" [NULL], return 'true' to indicate default
|
||||
* policy. Otherwise, check for intersection between mask and the policy
|
||||
* nodemask for 'bind' or 'interleave' policy. For 'perferred' or 'local'
|
||||
* nodemask for 'bind' or 'interleave' policy. For 'preferred' or 'local'
|
||||
* policy, always return true since it may allocate elsewhere on fallback.
|
||||
*
|
||||
* Takes task_lock(tsk) to prevent freeing of its mempolicy.
|
||||
|
||||
@ -2779,11 +2779,11 @@ restore:
|
||||
*
|
||||
* For empty entries inside CPU page table (pte_none() or pmd_none() is true) we
|
||||
* do set MIGRATE_PFN_MIGRATE flag inside the corresponding source array thus
|
||||
* allowing the caller to allocate device memory for those unback virtual
|
||||
* address. For this the caller simply has to allocate device memory and
|
||||
* allowing the caller to allocate device memory for those unbacked virtual
|
||||
* addresses. For this the caller simply has to allocate device memory and
|
||||
* properly set the destination entry like for regular migration. Note that
|
||||
* this can still fails and thus inside the device driver must check if the
|
||||
* migration was successful for those entries after calling migrate_vma_pages()
|
||||
* this can still fail, and thus inside the device driver you must check if the
|
||||
* migration was successful for those entries after calling migrate_vma_pages(),
|
||||
* just like for regular migration.
|
||||
*
|
||||
* After that, the callers must call migrate_vma_pages() to go over each entry
|
||||
|
||||
@ -612,7 +612,7 @@ static unsigned long count_vma_pages_range(struct mm_struct *mm,
|
||||
unsigned long nr_pages = 0;
|
||||
struct vm_area_struct *vma;
|
||||
|
||||
/* Find first overlaping mapping */
|
||||
/* Find first overlapping mapping */
|
||||
vma = find_vma_intersection(mm, addr, end);
|
||||
if (!vma)
|
||||
return 0;
|
||||
@ -2875,7 +2875,7 @@ int __do_munmap(struct mm_struct *mm, unsigned long start, size_t len,
|
||||
if (unlikely(uf)) {
|
||||
/*
|
||||
* If userfaultfd_unmap_prep returns an error the vmas
|
||||
* will remain splitted, but userland will get a
|
||||
* will remain split, but userland will get a
|
||||
* highly unexpected error anyway. This is no
|
||||
* different than the case where the first of the two
|
||||
* __split_vma fails, but we don't undo the first
|
||||
|
||||
@ -699,7 +699,7 @@ SYSCALL_DEFINE1(pkey_free, int, pkey)
|
||||
mmap_write_unlock(current->mm);
|
||||
|
||||
/*
|
||||
* We could provie warnings or errors if any VMA still
|
||||
* We could provide warnings or errors if any VMA still
|
||||
* has the pkey set here.
|
||||
*/
|
||||
return ret;
|
||||
|
||||
@ -730,7 +730,7 @@ static unsigned long mremap_to(unsigned long addr, unsigned long old_len,
|
||||
* So, to avoid such scenario we can pre-compute if the whole
|
||||
* operation has high chances to success map-wise.
|
||||
* Worst-scenario case is when both vma's (new_addr and old_addr) get
|
||||
* split in 3 before unmaping it.
|
||||
* split in 3 before unmapping it.
|
||||
* That means 2 more maps (1 for each) to the ones we already hold.
|
||||
* Check whether current map count plus 2 still leads us to 4 maps below
|
||||
* the threshold, otherwise return -ENOMEM here to be more safe.
|
||||
|
||||
@ -74,7 +74,7 @@ static inline bool is_memcg_oom(struct oom_control *oc)
|
||||
|
||||
#ifdef CONFIG_NUMA
|
||||
/**
|
||||
* oom_cpuset_eligible() - check task eligiblity for kill
|
||||
* oom_cpuset_eligible() - check task eligibility for kill
|
||||
* @start: task struct of which task to consider
|
||||
* @oc: pointer to struct oom_control
|
||||
*
|
||||
|
||||
@ -1806,7 +1806,7 @@ pause:
|
||||
break;
|
||||
|
||||
/*
|
||||
* In the case of an unresponding NFS server and the NFS dirty
|
||||
* In the case of an unresponsive NFS server and the NFS dirty
|
||||
* pages exceeds dirty_thresh, give the other good wb's a pipe
|
||||
* to go through, so that tasks on them still remain responsive.
|
||||
*
|
||||
@ -2216,7 +2216,7 @@ int write_cache_pages(struct address_space *mapping,
|
||||
* Page truncated or invalidated. We can freely skip it
|
||||
* then, even for data integrity operations: the page
|
||||
* has disappeared concurrently, so there could be no
|
||||
* real expectation of this data interity operation
|
||||
* real expectation of this data integrity operation
|
||||
* even if there is now a new, dirty page at the same
|
||||
* pagecache address.
|
||||
*/
|
||||
|
||||
@ -893,7 +893,7 @@ compaction_capture(struct capture_control *capc, struct page *page,
|
||||
return false;
|
||||
|
||||
/*
|
||||
* Do not let lower order allocations polluate a movable pageblock.
|
||||
* Do not let lower order allocations pollute a movable pageblock.
|
||||
* This might let an unmovable request use a reclaimable pageblock
|
||||
* and vice-versa but no more than normal fallback logic which can
|
||||
* have trouble finding a high-order free page.
|
||||
@ -2776,7 +2776,7 @@ static bool unreserve_highatomic_pageblock(const struct alloc_context *ac,
|
||||
/*
|
||||
* In page freeing path, migratetype change is racy so
|
||||
* we can counter several free pages in a pageblock
|
||||
* in this loop althoug we changed the pageblock type
|
||||
* in this loop although we changed the pageblock type
|
||||
* from highatomic to ac->migratetype. So we should
|
||||
* adjust the count once.
|
||||
*/
|
||||
@ -3080,7 +3080,7 @@ static void drain_local_pages_wq(struct work_struct *work)
|
||||
* drain_all_pages doesn't use proper cpu hotplug protection so
|
||||
* we can race with cpu offline when the WQ can move this from
|
||||
* a cpu pinned worker to an unbound one. We can operate on a different
|
||||
* cpu which is allright but we also have to make sure to not move to
|
||||
* cpu which is alright but we also have to make sure to not move to
|
||||
* a different one.
|
||||
*/
|
||||
preempt_disable();
|
||||
@ -5929,7 +5929,7 @@ static int build_zonerefs_node(pg_data_t *pgdat, struct zoneref *zonerefs)
|
||||
static int __parse_numa_zonelist_order(char *s)
|
||||
{
|
||||
/*
|
||||
* We used to support different zonlists modes but they turned
|
||||
* We used to support different zonelists modes but they turned
|
||||
* out to be just not useful. Let's keep the warning in place
|
||||
* if somebody still use the cmd line parameter so that we do
|
||||
* not fail it silently
|
||||
@ -7670,7 +7670,7 @@ static void check_for_memory(pg_data_t *pgdat, int nid)
|
||||
}
|
||||
|
||||
/*
|
||||
* Some architecturs, e.g. ARC may have ZONE_HIGHMEM below ZONE_NORMAL. For
|
||||
* Some architectures, e.g. ARC may have ZONE_HIGHMEM below ZONE_NORMAL. For
|
||||
* such cases we allow max_zone_pfn sorted in the descending order
|
||||
*/
|
||||
bool __weak arch_has_descending_max_zone_pfns(void)
|
||||
@ -8728,7 +8728,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
|
||||
* alloc_contig_range() -- tries to allocate given range of pages
|
||||
* @start: start PFN to allocate
|
||||
* @end: one-past-the-last PFN to allocate
|
||||
* @migratetype: migratetype of the underlaying pageblocks (either
|
||||
* @migratetype: migratetype of the underlying pageblocks (either
|
||||
* #MIGRATE_MOVABLE or #MIGRATE_CMA). All pageblocks
|
||||
* in range must have the same migratetype and it must
|
||||
* be either of the two.
|
||||
@ -8988,7 +8988,7 @@ EXPORT_SYMBOL(free_contig_range);
|
||||
|
||||
/*
|
||||
* The zone indicated has a new number of managed_pages; batch sizes and percpu
|
||||
* page high values need to be recalulated.
|
||||
* page high values need to be recalculated.
|
||||
*/
|
||||
void __meminit zone_pcp_update(struct zone *zone)
|
||||
{
|
||||
|
||||
@ -233,7 +233,7 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage)
|
||||
/*
|
||||
* We don't clear the bit on the oldpage as it's going to be freed
|
||||
* after migration. Until then, the info can be useful in case of
|
||||
* a bug, and the overal stats will be off a bit only temporarily.
|
||||
* a bug, and the overall stats will be off a bit only temporarily.
|
||||
* Also, migrate_misplaced_transhuge_page() can still fail the
|
||||
* migration and then we want the oldpage to retain the info. But
|
||||
* in that case we also don't need to explicitly clear the info from
|
||||
|
||||
@ -170,7 +170,7 @@ struct percpu_stats {
|
||||
u64 nr_max_alloc; /* max # of live allocations */
|
||||
u32 nr_chunks; /* current # of live chunks */
|
||||
u32 nr_max_chunks; /* max # of live chunks */
|
||||
size_t min_alloc_size; /* min allocaiton size */
|
||||
size_t min_alloc_size; /* min allocation size */
|
||||
size_t max_alloc_size; /* max allocation size */
|
||||
};
|
||||
|
||||
|
||||
@ -1862,7 +1862,7 @@ fail:
|
||||
pr_info("limit reached, disable warning\n");
|
||||
}
|
||||
if (is_atomic) {
|
||||
/* see the flag handling in pcpu_blance_workfn() */
|
||||
/* see the flag handling in pcpu_balance_workfn() */
|
||||
pcpu_atomic_alloc_failed = true;
|
||||
pcpu_schedule_balance_work();
|
||||
} else {
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef _LINUX_PGALLLC_TRACK_H
|
||||
#define _LINUX_PGALLLC_TRACK_H
|
||||
#ifndef _LINUX_PGALLOC_TRACK_H
|
||||
#define _LINUX_PGALLOC_TRACK_H
|
||||
|
||||
#if defined(CONFIG_MMU)
|
||||
static inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd,
|
||||
@ -48,4 +48,4 @@ static inline pmd_t *pmd_alloc_track(struct mm_struct *mm, pud_t *pud,
|
||||
(__pte_alloc_kernel(pmd) || ({*(mask)|=PGTBL_PMD_MODIFIED;0;})))?\
|
||||
NULL: pte_offset_kernel(pmd, address))
|
||||
|
||||
#endif /* _LINUX_PGALLLC_TRACK_H */
|
||||
#endif /* _LINUX_PGALLOC_TRACK_H */
|
||||
|
||||
@ -259,7 +259,7 @@ static void kmem_cache_node_init(struct kmem_cache_node *parent)
|
||||
|
||||
#define BATCHREFILL_LIMIT 16
|
||||
/*
|
||||
* Optimization question: fewer reaps means less probability for unnessary
|
||||
* Optimization question: fewer reaps means less probability for unnecessary
|
||||
* cpucache drain/refill cycles.
|
||||
*
|
||||
* OTOH the cpuarrays can contain lots of objects,
|
||||
@ -2381,8 +2381,8 @@ union freelist_init_state {
|
||||
};
|
||||
|
||||
/*
|
||||
* Initialize the state based on the randomization methode available.
|
||||
* return true if the pre-computed list is available, false otherwize.
|
||||
* Initialize the state based on the randomization method available.
|
||||
* return true if the pre-computed list is available, false otherwise.
|
||||
*/
|
||||
static bool freelist_state_initialize(union freelist_init_state *state,
|
||||
struct kmem_cache *cachep,
|
||||
|
||||
@ -3391,7 +3391,7 @@ EXPORT_SYMBOL(kmem_cache_alloc_bulk);
|
||||
*/
|
||||
|
||||
/*
|
||||
* Mininum / Maximum order of slab pages. This influences locking overhead
|
||||
* Minimum / Maximum order of slab pages. This influences locking overhead
|
||||
* and slab fragmentation. A higher order reduces the number of partial slabs
|
||||
* and increases the number of allocations possible without having to
|
||||
* take the list_lock.
|
||||
|
||||
@ -16,7 +16,7 @@
|
||||
* to local caches without needing to acquire swap_info
|
||||
* lock. We do not reuse the returned slots directly but
|
||||
* move them back to the global pool in a batch. This
|
||||
* allows the slots to coaellesce and reduce fragmentation.
|
||||
* allows the slots to coalesce and reduce fragmentation.
|
||||
*
|
||||
* The swap entry allocated is marked with SWAP_HAS_CACHE
|
||||
* flag in map_count that prevents it from being allocated
|
||||
|
||||
@ -1583,7 +1583,7 @@ static unsigned long lazy_max_pages(void)
|
||||
static atomic_long_t vmap_lazy_nr = ATOMIC_LONG_INIT(0);
|
||||
|
||||
/*
|
||||
* Serialize vmap purging. There is no actual criticial section protected
|
||||
* Serialize vmap purging. There is no actual critical section protected
|
||||
* by this look, but we want to avoid concurrent calls for performance
|
||||
* reasons and to make the pcpu_get_vm_areas more deterministic.
|
||||
*/
|
||||
@ -2628,7 +2628,7 @@ static void __vfree(const void *addr)
|
||||
* May sleep if called *not* from interrupt context.
|
||||
* Must not be called in NMI context (strictly speaking, it could be
|
||||
* if we have CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG, but making the calling
|
||||
* conventions for vfree() arch-depenedent would be a really bad idea).
|
||||
* conventions for vfree() arch-dependent would be a really bad idea).
|
||||
*/
|
||||
void vfree(const void *addr)
|
||||
{
|
||||
@ -3141,7 +3141,7 @@ static int aligned_vread(char *buf, char *addr, unsigned long count)
|
||||
/*
|
||||
* To do safe access to this _mapped_ area, we need
|
||||
* lock. But adding lock here means that we need to add
|
||||
* overhead of vmalloc()/vfree() calles for this _debug_
|
||||
* overhead of vmalloc()/vfree() calls for this _debug_
|
||||
* interface, rarely used. Instead of that, we'll use
|
||||
* kmap() and get small overhead in this access function.
|
||||
*/
|
||||
|
||||
@ -934,7 +934,7 @@ void cpu_vm_stats_fold(int cpu)
|
||||
|
||||
/*
|
||||
* this is only called if !populated_zone(zone), which implies no other users of
|
||||
* pset->vm_stat_diff[] exsist.
|
||||
* pset->vm_stat_diff[] exist.
|
||||
*/
|
||||
void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset)
|
||||
{
|
||||
|
||||
@ -336,7 +336,7 @@ int zpool_shrink(struct zpool *zpool, unsigned int pages,
|
||||
* This may hold locks, disable interrupts, and/or preemption,
|
||||
* and the zpool_unmap_handle() must be called to undo those
|
||||
* actions. The code that uses the mapped handle should complete
|
||||
* its operatons on the mapped handle memory quickly and unmap
|
||||
* its operations on the mapped handle memory quickly and unmap
|
||||
* as soon as possible. As the implementation may use per-cpu
|
||||
* data, multiple handles should not be mapped concurrently on
|
||||
* any cpu.
|
||||
|
||||
@ -1227,7 +1227,7 @@ EXPORT_SYMBOL_GPL(zs_get_total_pages);
|
||||
* zs_map_object - get address of allocated object from handle.
|
||||
* @pool: pool from which the object was allocated
|
||||
* @handle: handle returned from zs_malloc
|
||||
* @mm: maping mode to use
|
||||
* @mm: mapping mode to use
|
||||
*
|
||||
* Before using an object allocated from zs_malloc, it must be mapped using
|
||||
* this function. When done with the object, it must be unmapped using
|
||||
|
||||
Loading…
Reference in New Issue
Block a user