Jan Kara 730633f0b7 mm: Protect operations adding pages to page cache with invalidate_lock ... Currently, serializing operations such as page fault, read, or readahead against hole punching is rather difficult. The basic race scheme is like: fallocate(FALLOC_FL_PUNCH_HOLE) read / fault / .. truncate_inode_pages_range() <create pages in page cache here> <update fs block mapping and free blocks> Now the problem is in this way read / page fault / readahead can instantiate pages in page cache with potentially stale data (if blocks get quickly reused). Avoiding this race is not simple - page locks do not work because we want to make sure there are *no* pages in given range. inode->i_rwsem does not work because page fault happens under mmap_sem which ranks below inode->i_rwsem. Also using it for reads makes the performance for mixed read-write workloads suffer. So create a new rw_semaphore in the address_space - invalidate_lock - that protects adding of pages to page cache for page faults / reads / readahead. Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>		2021-07-13 13:14:27 +02:00
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kasan
kfence
backing-dev.c
balloon_compaction.c
bootmem_info.c
cleancache.c
cma_debug.c
cma_sysfs.c
cma.c
cma.h
compaction.c
debug_page_ref.c
debug_vm_pgtable.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c	mm: Protect operations adding pages to page cache with invalidate_lock	2021-07-13 13:14:27 +02:00
frontswap.c
gup_test.c
gup_test.h
gup.c	mm: introduce memfd_secret system call to create "secret" memory areas	2021-07-08 11:48:21 -07:00
highmem.c
hmm.c
huge_memory.c	mm/rmap: fix comments left over from recent changes	2021-07-11 15:05:15 -07:00
hugetlb_cgroup.c
hugetlb_vmemmap.c
hugetlb_vmemmap.h
hugetlb.c
hwpoison-inject.c
init-mm.c	mm: add setup_initial_init_mm() helper	2021-07-08 11:48:21 -07:00
internal.h	mmap: make mlock_future_check() global	2021-07-08 11:48:20 -07:00
interval_tree.c
io-mapping.c
ioremap.c
Kconfig	mm: introduce memfd_secret system call to create "secret" memory areas	2021-07-08 11:48:21 -07:00
Kconfig.debug
khugepaged.c
kmemleak.c
ksm.c
list_lru.c
maccess.c
madvise.c	mm: Fix comments mentioning i_mutex	2021-07-12 18:31:16 +02:00
Makefile	mm: introduce memfd_secret system call to create "secret" memory areas	2021-07-08 11:48:21 -07:00
mapping_dirty_helpers.c
memblock.c
memcontrol.c
memfd.c
memory_hotplug.c
memory-failure.c	mm: Fix comments mentioning i_mutex	2021-07-12 18:31:16 +02:00
memory.c
mempolicy.c
mempool.c
memremap.c
memtest.c
migrate.c
mincore.c
mlock.c	mm: introduce memfd_secret system call to create "secret" memory areas	2021-07-08 11:48:21 -07:00
mm_init.c
mmap_lock.c
mmap.c	mmap: make mlock_future_check() global	2021-07-08 11:48:20 -07:00
mmu_gather.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c	mm/mremap: allow arch runtime override	2021-07-08 11:48:23 -07:00
msync.c
nommu.c
oom_kill.c
page_alloc.c	mm/page_alloc: Revert pahole zero-sized workaround	2021-07-10 16:09:39 -07:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c
page_owner.c
page_poison.c
page_reporting.c
page_reporting.h
page_vma_mapped.c
page-writeback.c
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c
pgalloc-track.h
pgtable-generic.c
process_vm_access.c
ptdump.c
readahead.c	mm: Protect operations adding pages to page cache with invalidate_lock	2021-07-13 13:14:27 +02:00
rmap.c	mm: Protect operations adding pages to page cache with invalidate_lock	2021-07-13 13:14:27 +02:00
rodata_test.c
secretmem.c	PM: hibernate: disable when there are active secretmem users	2021-07-08 11:48:21 -07:00
shmem.c	mm: Fix comments mentioning i_mutex	2021-07-12 18:31:16 +02:00
shuffle.c
shuffle.h
slab_common.c
slab.c
slab.h
slob.c
slub.c
sparse-vmemmap.c
sparse.c
swap_cgroup.c
swap_slots.c
swap_state.c
swap.c
swapfile.c
truncate.c	mm: Protect operations adding pages to page cache with invalidate_lock	2021-07-13 13:14:27 +02:00
usercopy.c
userfaultfd.c
util.c
vmacache.c
vmalloc.c
vmpressure.c
vmscan.c
vmstat.c
workingset.c
z3fold.c
zbud.c
zpool.c
zsmalloc.c
zswap.c