Hugh Dickins 1572edd03a tmpfs: undo fallocation on failure ... In the previous episode, we left the already-fallocated pages attached to the file when shmem_fallocate() fails part way through. Now try to do better, by extending the earlier optimization of !Uptodate pages (then always under page lock) to !Uptodate pages (outside of page lock), representing fallocated pages. And don't waste time clearing them at the time of fallocate(), leave that until later if necessary. Adapt shmem_truncate_range() to shmem_undo_range(), so that a failing fallocate can recognize and remove precisely those !Uptodate allocations which it added (and were not independently allocated by racing tasks). But unless we start playing with swapfile.c and memcontrol.c too, once one of our fallocated pages reaches shmem_writepage(), we do then have to instantiate it as an ordinarily allocated page, before swapping out. This is unsatisfactory, but improved in the next episode. Change-Id: I6220082ed23caded4c1d022ad53f387270ee4ec8 Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Cong Wang <amwang@redhat.com> Cc: Kay Sievers <kay@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-12-07 21:01:08 +03:00
..
backing-dev.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
bootmem.c	mm: sparse: fix usemap allocation above node descriptor section	2016-10-29 23:12:12 +08:00
bounce.c
cleancache.c
compaction.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
debug-pagealloc.c
dmapool.c	mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls	2012-12-17 10:37:44 -08:00
fadvise.c	mm/fadvise.c: drain all pagevecs if POSIX_FADV_DONTNEED fails to discard all pages	2013-02-28 06:59:01 -08:00
failslab.c
filemap.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
filemap_xip.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
fremap.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
highmem.c	mm: highmem: don't treat PKMAP_ADDR(LAST_PKMAP) as a highmem address	2014-06-11 12:04:22 -07:00
huge_memory.c	mm, thp: fix collapsing of hugepages on madvise	2015-02-02 17:05:07 +08:00
hugetlb.c	Fix incomplete backport of commit 0f792cf949a0	2016-10-26 23:15:44 +08:00
hwpoison-inject.c
init-mm.c
internal.h	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
Kconfig	BACKPORT: mm/zsmalloc: add statistics support	2018-01-01 21:27:09 +03:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	mm: kmemleak: allow safe memory scanning during kmemleak disabling	2015-10-22 09:20:06 +08:00
ksm.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
maccess.c
madvise.c	mm/fs: route MADV_REMOVE to FALLOC_FL_PUNCH_HOLE	2020-12-07 21:00:58 +03:00
Makefile	BACKPORT: mm/zpool: implement common zpool api to zbud/zsmalloc	2018-01-01 21:27:00 +03:00
memblock.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
memcontrol.c	shmem: replace page if mapping excludes its zone	2020-12-07 20:57:06 +03:00
memory-failure.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
memory.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
memory_hotplug.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
mempolicy.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
mempool.c
migrate.c	BACKPORT: Sanitize 'move_pages()' permission checks	2018-01-13 17:13:40 +03:00
mincore.c	swap: make each swap partition have one address_space	2018-01-01 22:02:05 +03:00
mlock.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
mm_init.c
mmap.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
mmu_context.c
mmu_notifier.c	mm: mmu_notifier: re-fix freed page still mapped in secondary MMU	2013-06-07 12:49:25 -07:00
mmzone.c
mprotect.c	mm: add a field to store names for private anonymous memory	2013-10-11 10:02:06 -07:00
mremap.c
msync.c
nobootmem.c	memblock: free allocated memblock_reserved_regions later	2012-07-16 09:04:45 -07:00
nommu.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
oom_kill.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
page-writeback.c	mm: fix calculation of dirtyable memory	2016-10-29 23:12:16 +08:00
page_alloc.c	mm/page_alloc.c: use '__paginginit' instead of '__init'	2017-12-27 17:13:39 +03:00
page_cgroup.c	cgroup/kmemleak: add kmemleak_free() for cgroup deallocations.	2015-02-02 17:05:07 +08:00
page_io.c
page_isolation.c	mm: page_isolation: MIGRATE_CMA isolation functions added	2013-02-27 18:14:02 -08:00
pagewalk.c	mm/pagewalk.c: walk_page_range should avoid VM_PFNMAP areas	2013-06-07 12:49:28 -07:00
percpu-km.c
percpu-vm.c	percpu: perform tlb flush after pcpu_map_pages() failure	2014-12-01 18:02:23 +08:00
percpu.c	Revert "percpu: free percpu allocation info for uniprocessor system"	2015-02-02 17:04:38 +08:00
pgtable-generic.c
prio_tree.c
process_vm_access.c	Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys	2013-03-14 11:29:51 -07:00
quicklist.c
readahead.c	mm: change initial readahead window size calculation	2016-10-29 23:12:18 +08:00
rmap.c	mm: fix anon_vma->degree underflow in anon_vma endless growing prevention	2015-04-14 17:34:04 +08:00
shmem.c	tmpfs: undo fallocation on failure	2020-12-07 21:01:08 +03:00
slab.c	cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags	2014-12-01 18:02:38 +08:00
slob.c
slub.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
sparse-vmemmap.c
sparse.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
swap.c	swap: make each swap partition have one address_space	2018-01-01 22:02:05 +03:00
swap_state.c	swap: make each swap partition have one address_space	2018-01-01 22:02:05 +03:00
swapfile.c	vfs: make path_openat take a struct filename pointer	2018-12-07 22:28:48 +04:00
thrash.c
truncate.c	mm/fs: remove truncate_range	2020-12-07 20:57:30 +03:00
util.c	swap: make each swap partition have one address_space	2018-01-01 22:02:05 +03:00
vmalloc.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
vmscan.c	mm: new shrinker API	2020-11-29 16:11:30 +03:00
vmstat.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
zpool.c	BACKPORT: mm/zpool: add name argument to create zpool	2018-01-01 21:27:09 +03:00
zsmalloc.c	UPSTREAM: zsmalloc: fix a null pointer dereference in destroy_handle_cache()	2018-01-01 21:27:14 +03:00