Hugh Dickins f00cdc6df7 shmem: fix faulting into a hole while it's punched ... Trinity finds that mmap access to a hole while it's punched from shmem can prevent the madvise(MADV_REMOVE) or fallocate(FALLOC_FL_PUNCH_HOLE) from completing, until the reader chooses to stop; with the puncher's hold on i_mutex locking out all other writers until it can complete. It appears that the tmpfs fault path is too light in comparison with its hole-punching path, lacking an i_data_sem to obstruct it; but we don't want to slow down the common case. Extend shmem_fallocate()'s existing range notification mechanism, so shmem_fault() can refrain from faulting pages into the hole while it's punched, waiting instead on i_mutex (when safe to sleep; or repeatedly faulting when not). [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Hugh Dickins <hughd@google.com> Reported-by: Sasha Levin <sasha.levin@oracle.com> Tested-by: Sasha Levin <sasha.levin@oracle.com> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-06-23 16:47:44 -07:00
..
backing-dev.c	arch: Mass conversion of smp_mb__*()	2014-04-18 14:20:48 +02:00
balloon_compaction.c	mm: print more details for bad_page()	2014-01-23 16:36:50 -08:00
bootmem.c	mm/bootmem.c: remove unused local `map'	2013-11-13 12:09:09 +09:00
cleancache.c	mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE	2014-01-23 16:36:50 -08:00
compaction.c	mm, compaction: properly signal and act upon lock and need_sched() contention	2014-06-04 16:54:11 -07:00
debug-pagealloc.c
dmapool.c	mm/dmapool.c: reuse devres_release() to free resources	2014-06-04 16:54:08 -07:00
early_ioremap.c	mm: create generic early_ioremap() support	2014-04-07 16:36:15 -07:00
fadvise.c
failslab.c
filemap_xip.c	seqcount: Add lockdep functionality to seqcount/seqlock structures	2013-11-06 12:40:26 +01:00
filemap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-06-12 10:30:18 -07:00
fremap.c	mm: mark remap_file_pages() syscall as deprecated	2014-06-06 16:08:17 -07:00
frontswap.c	swap: change swap_list_head to plist, add swap_avail_head	2014-06-04 16:54:07 -07:00
gup.c	mm: cleanup __get_user_pages()	2014-06-04 16:54:05 -07:00
highmem.c
huge_memory.c	mm: let mm_find_pmd fix buggy race with THP fault	2014-06-23 16:47:44 -07:00
hugetlb_cgroup.c	cgroup: remove css_parent()	2014-05-16 13:22:48 -04:00
hugetlb.c	hugetlb: fix copy_hugetlb_page_range() to handle migration/hwpoisoned entry	2014-06-23 16:47:43 -07:00
hwpoison-inject.c	mm/hwpoison: add '#' to hwpoison_inject	2014-01-21 16:19:48 -08:00
init-mm.c
internal.h	mm, compaction: properly signal and act upon lock and need_sched() contention	2014-06-04 16:54:11 -07:00
interval_tree.c
iov_iter.c	bio_vec-backed iov_iter	2014-05-06 17:39:45 -04:00
Kconfig	mm/zsmalloc: make zsmalloc module-buildable	2014-06-04 16:54:14 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c	mm/kmemleak-test.c: use pr_fmt for logging	2014-06-06 16:08:18 -07:00
kmemleak.c	mm: introduce kmemleak_update_trace()	2014-06-06 16:08:17 -07:00
ksm.c	mm: let mm_find_pmd fix buggy race with THP fault	2014-06-23 16:47:44 -07:00
list_lru.c	mm: keep page cache radix tree nodes in check	2014-04-03 16:21:01 -07:00
maccess.c
madvise.c	mm: madvise: fix MADV_WILLNEED on shmem swapouts	2014-05-23 09:37:29 -07:00
Makefile	mm: move get_user_pages()-related code to separate file	2014-06-04 16:54:04 -07:00
memblock.c	mm/memblock.c: call kmemleak directly from memblock_(alloc|free)	2014-06-06 16:08:17 -07:00
memcontrol.c	Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-06-09 15:03:33 -07:00
memory_hotplug.c	mm, migration: add destination page freeing callback	2014-06-04 16:54:06 -07:00
memory-failure.c	mm/memory-failure.c: support use of a dedicated thread to handle SIGBUS(BUS_MCEERR_AO)	2014-06-04 16:54:13 -07:00
memory.c	mm: document do_fault_around() feature	2014-06-04 16:54:12 -07:00
mempolicy.c	Merge branch 'next' (accumulated 3.16 merge window patches) into master	2014-06-08 11:31:16 -07:00
mempool.c	mm/mempool.c: update the kmemleak stack trace for mempool allocations	2014-06-06 16:08:17 -07:00
migrate.c	mm: let mm_find_pmd fix buggy race with THP fault	2014-06-23 16:47:44 -07:00
mincore.c	mm + fs: prepare for non-page entries in page cache radix trees	2014-04-03 16:21:00 -07:00
mlock.c	mm: try_to_unmap_cluster() should lock_page() before mlocking	2014-04-07 16:35:57 -07:00
mm_init.c	mm: bring back /sys/kernel/mm	2014-01-27 21:02:39 -08:00
mmap.c	mm: convert some level-less printks to pr_*	2014-06-06 16:08:18 -07:00
mmu_context.c	sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm	2014-02-21 08:50:17 +01:00
mmu_notifier.c	mm: audit/fix non-modular users of module_init in core code	2014-01-23 16:36:52 -08:00
mmzone.c
mprotect.c	mm: move mmu notifier call from change_protection to change_pmd_range	2014-04-07 16:35:50 -07:00
mremap.c	mm, thp: close race between mremap() and split_huge_page()	2014-05-11 17:55:48 +09:00
msync.c	mm/msync.c: sync only the requested range in msync()	2014-06-04 16:54:11 -07:00
nobootmem.c	mm/memblock.c: call kmemleak directly from memblock_(alloc|free)	2014-06-06 16:08:17 -07:00
nommu.c	mm: nommu: per-thread vma cache fix	2014-06-23 16:47:43 -07:00
oom_kill.c	mm, oom: base root bonus on current usage	2014-01-30 16:56:56 -08:00
page_alloc.c	mm, pcp: allow restoring percpu_pagelist_fraction default	2014-06-23 16:47:43 -07:00
page_cgroup.c	mm/page_cgroup.c: mark functions as static	2014-04-03 16:21:02 -07:00
page_io.c	fix __swap_writepage() compile failure on old gcc versions	2014-06-14 19:30:48 -05:00
page_isolation.c
page-writeback.c	Clean ups and miscellaneous bug fixes, in particular for the new	2014-06-08 13:03:35 -07:00
pagewalk.c	mm/pagewalk.c: fix walk_page_range() access of wrong PTEs	2013-10-30 14:27:03 -07:00
percpu-km.c
percpu-vm.c
percpu.c	percpu: make pcpu_alloc_chunk() use pcpu_mem_free() instead of kfree()	2014-04-14 16:18:06 -04:00
pgtable-generic.c	mm: fix TLB flush race between migration, and change_protection_range	2013-12-18 19:04:51 -08:00
process_vm_access.c	start adding the tag to iov_iter	2014-05-06 17:32:49 -04:00
quicklist.c
readahead.c	mm/readahead.c: inline ra_submit	2014-04-07 16:35:58 -07:00
rmap.c	mm: let mm_find_pmd fix buggy race with THP fault	2014-06-23 16:47:44 -07:00
shmem.c	shmem: fix faulting into a hole while it's punched	2014-06-23 16:47:44 -07:00
slab_common.c	slab: delete cache from list after __kmem_cache_shutdown succeeds	2014-06-04 16:54:08 -07:00
slab.c	memcg, slab: merge memcg_{bind,release}_pages to memcg_{un}charge_slab	2014-06-04 16:54:01 -07:00
slab.h	memcg, slab: merge memcg_{bind,release}_pages to memcg_{un}charge_slab	2014-06-04 16:54:01 -07:00
slob.c	slab: get_online_mems for kmem_cache_{create,destroy,shrink}	2014-06-04 16:53:59 -07:00
slub.c	slub: search partial list on numa_mem_id(), instead of numa_node_id()	2014-06-06 16:08:06 -07:00
sparse-vmemmap.c	mm/sparse: use memblock apis for early memory allocations	2014-01-21 16:19:47 -08:00
sparse.c	mm: use macros from compiler.h instead of __attribute__((...))	2014-04-07 16:35:54 -07:00
swap_state.c	mm: page_alloc: convert hot/cold parameter and immediate callers to bool	2014-06-04 16:54:09 -07:00
swap.c	mm: non-atomically mark page accessed during page cache allocation where possible	2014-06-04 16:54:10 -07:00
swapfile.c	mm/swapfile.c: delete the "last_in_cluster < scan_base" loop in the body of scan_swap_map()	2014-06-04 16:54:12 -07:00
truncate.c	mm: filemap: update find_get_pages_tag() to deal with shadow entries	2014-05-06 13:04:59 -07:00
util.c	nick kvfree() from apparmor	2014-05-06 14:02:53 -04:00
vmacache.c	mm,vmacache: optimize overflow system-wide flushing	2014-06-04 16:53:57 -07:00
vmalloc.c	mm/vmalloc.c: export unmap_kernel_range()	2014-06-04 16:54:14 -07:00
vmpressure.c	arm, pm, vmpressure: add missing slab.h includes	2014-02-03 13:24:01 -05:00
vmscan.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-06-12 10:30:18 -07:00
vmstat.c	mm: use the light version __mod_zone_page_state in mlocked_vma_newpage()	2014-06-04 16:54:07 -07:00
workingset.c	mm: keep page cache radix tree nodes in check	2014-04-03 16:21:01 -07:00
zbud.c	mm/zbud.c: make size unsigned like unique callsite	2014-06-04 16:54:13 -07:00
zsmalloc.c	zsmalloc: fixup trivial zs size classes value in comments	2014-06-04 16:54:13 -07:00
zswap.c	mm/zswap: NUMA aware allocation for zswap_dstmem	2014-06-04 16:54:14 -07:00