Linus Torvalds 06274364ed mm: get rid of vmacache_flush_all() entirely ... commit 7a9cdebdcc upstream. Jann Horn points out that the vmacache_flush_all() function is not only potentially expensive, it's buggy too. It also happens to be entirely unnecessary, because the sequence number overflow case can be avoided by simply making the sequence number be 64-bit. That doesn't even grow the data structures in question, because the other adjacent fields are already 64-bit. So simplify the whole thing by just making the sequence number overflow case go away entirely, which gets rid of all the complications and makes the code faster too. Win-win. [ Oleg Nesterov points out that the VMACACHE_FULL_FLUSHES statistics also just goes away entirely with this ] Reported-by: Jann Horn <jannh@google.com> Suggested-by: Will Deacon <will.deacon@arm.com> Acked-by: Davidlohr Bueso <dave@stgolabs.net> Cc: Oleg Nesterov <oleg@redhat.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-19 22:43:48 +02:00
..
kasan	kasan: fix shadow_size calculation error in kasan_module_alloc	2018-08-24 13:09:12 +02:00
Kconfig	mm: don't allow deferred pages with NEED_PER_CPU_KM	2018-05-22 18:53:58 +02:00
Kconfig.debug	kmemcheck: rip it out	2018-02-22 15:42:24 +01:00
Makefile	kmemcheck: rip it out	2018-02-22 15:42:24 +01:00
backing-dev.c	bdi: Fix another oops in wb_workfn()	2018-07-22 14:28:49 +02:00
balloon_compaction.c	mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY	2017-09-08 18:26:46 -07:00
bootmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cleancache.c	fs: switch ->s_uuid to uuid_t	2017-06-05 16:59:12 +02:00
cma.c	mm/cma.c: take __GFP_NOWARN into account in cma_alloc()	2017-10-13 16:18:32 -07:00
cma.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
cma_debug.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compaction.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
debug.c	mm: get rid of vmacache_flush_all() entirely	2018-09-19 22:43:48 +02:00
debug_page_ref.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dmapool.c	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
early_ioremap.c	mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep	2018-02-25 11:08:03 +01:00
fadvise.c	mm/fadvise.c: fix signed overflow UBSAN complaint	2018-09-15 09:45:28 +02:00
failslab.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
filemap.c	mm/filemap.c: fix NULL pointer in page_cache_tree_insert()	2018-04-24 09:36:39 +02:00
frame_vector.c	mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'	2018-03-03 10:24:21 +01:00
frontswap.c	mm, frontswap: convert frontswap_enabled to static key	2016-07-26 16:19:19 -07:00
gup.c	mm: do not bug_on on incorrect length in __mm_populate()	2018-07-17 11:39:29 +02:00
highmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hmm.c	mm/hmm: hmm_pfns_bad() was accessing wrong struct	2018-04-24 09:36:22 +02:00
huge_memory.c	mm/huge_memory.c: fix data loss when splitting a file pmd	2018-07-25 11:25:08 +02:00
hugetlb.c	mm: hugetlb: yield when prepping struct pages	2018-07-11 16:29:13 +02:00
hugetlb_cgroup.c	mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size	2016-05-20 17:58:30 -07:00
hwpoison-inject.c	mm: hwpoison: call shake_page() unconditionally	2017-05-03 15:52:12 -07:00
init-mm.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
internal.h	mm, oom: do not rely on TIF_MEMDIE for memory reserves access	2017-09-06 17:27:30 -07:00
interval_tree.c	lib/interval_tree: fast overlap detection	2017-09-08 18:26:49 -07:00
khugepaged.c	mm, thp: do not cause memcg oom for thp	2018-05-30 07:52:19 +02:00
kmemleak-test.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak.c	mm/kmemleak.c: wait for scan completion before disabling free	2018-05-30 07:52:21 +02:00
ksm.c	mm/ksm.c: ignore STABLE_FLAG of rmap_item->address in rmap_walk_ksm()	2018-07-03 11:25:03 +02:00
list_lru.c	mm: memcontrol: use vmalloc fallback for large kmem memcg arrays	2017-10-03 17:54:25 -07:00
maccess.c	x86: remove more uaccess_32.h complexity	2016-05-22 17:21:27 -07:00
madvise.c	mm/madvise.c: fix madvise() infinite loop under special circumstances	2017-12-05 11:26:29 +01:00
memblock.c	Revert "mm: page_alloc: skip over regions of invalid pfns where possible"	2018-03-28 18:24:39 +02:00
memcontrol.c	memcg: remove memcg_cgroup::id from IDR on mem_cgroup_css_alloc() failure	2018-09-05 09:26:32 +02:00
memory-failure.c	mm: hwpoison: disable memory error handling on 1GB hugepage	2018-07-11 16:29:20 +02:00
memory.c	mm/tlb: Remove tlb_remove_table() non-concurrent condition	2018-09-09 19:55:59 +02:00
memory_hotplug.c	mm/memory_hotplug: define find_{smallest|biggest}_section_pfn as unsigned long	2017-10-03 17:54:26 -07:00
mempolicy.c	mm/mempolicy.c: avoid use uninitialized preferred_node	2018-05-30 07:52:19 +02:00
mempool.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
memtest.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
migrate.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mincore.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mlock.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mm_init.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mmap.c	mm: do not bug_on on incorrect length in __mm_populate()	2018-07-17 11:39:29 +02:00
mmu_context.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
mmu_notifier.c	mm/mmu_notifier: kill invalidate_page	2017-08-31 16:13:00 -07:00
mmzone.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mprotect.c	x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings	2018-08-15 18:12:51 +02:00
mremap.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
msync.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nobootmem.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nommu.c	Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-09-14 18:13:32 -07:00
oom_kill.c	mm, oom: fix concurrent munlock and oom reaper unmap, v3	2018-05-16 10:10:27 +02:00
page-writeback.c	writeback: safer lock nesting	2018-04-24 09:36:39 +02:00
page_alloc.c	mm, page_alloc: do not break __GFP_THISNODE by zonelist reset	2018-06-26 08:06:33 +08:00
page_counter.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_ext.c	mm/page_ext.c: check if page_ext is not prepared	2017-11-24 08:37:05 +01:00
page_idle.c	mm: thp: fix potential clearing to referenced flag in page_idle_clear_pte_refs_one()	2018-05-30 07:52:24 +02:00
page_io.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_isolation.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_owner.c	mm/page_owner: fix recursion bug after changing skip entries	2018-05-30 07:52:21 +02:00
page_poison.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
page_vma_mapped.c	mm, page_vma_mapped: Drop faulty pointer arithmetics in check_pte()	2018-01-23 19:58:21 +01:00
pagewalk.c	mm/pagewalk.c: report holes in hugetlb ranges	2017-11-24 08:37:04 +01:00
percpu-internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
percpu-km.c	percpu: add __GFP_NORETRY semantics to the percpu balancing path	2018-04-08 14:26:29 +02:00
percpu-stats.c	percpu: fix starting offset for chunk statistics traversal	2017-09-27 14:45:57 -07:00
percpu-vm.c	percpu: add __GFP_NORETRY semantics to the percpu balancing path	2018-04-08 14:26:29 +02:00
percpu.c	percpu: include linux/sched.h for cond_resched()	2018-05-09 09:51:48 +02:00
pgtable-generic.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
process_vm_access.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
quicklist.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
readahead.c	readahead: stricter check for bdi io_pages	2018-09-09 19:55:53 +02:00
rmap.c	mm: do not drop unused pages when userfaultd is running	2018-07-17 11:39:29 +02:00
rodata_test.c	mm: fix RODATA_TEST failure "rodata_test: test data was not read only"	2017-10-03 17:54:24 -07:00
shmem.c	mm/shmem: do not wait for lock_page() in shmem_unused_huge_shrink()	2018-03-28 18:24:39 +02:00
slab.c	mm, slab: memcg_link the SLAB's kmem_cache	2018-05-30 07:52:21 +02:00
slab.h	kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK	2018-02-22 15:42:23 +01:00
slab_common.c	slub: fix failure when we delete and create a slab cache	2018-07-03 11:25:04 +02:00
slob.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
slub.c	mm/slub.c: add __printf verification to slab_err()	2018-08-03 07:50:23 +02:00
sparse-vmemmap.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sparse.c	mm: sections are not offlined during memory hotremove	2018-05-16 10:10:27 +02:00
swap.c	mm: avoid marking swap cached page as lazyfree	2017-10-03 17:54:24 -07:00
swap_cgroup.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
swap_slots.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
swap_state.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
swapfile.c	x86/speculation/l1tf: Limit swap file size to MAX_PA/2	2018-08-15 18:12:51 +02:00
truncate.c	mm/truncate.c: fix THP handling in invalidate_mapping_pages()	2017-07-10 16:32:32 -07:00
usercopy.c	mm/usercopy: Drop extra is_vmalloc_or_module() check	2017-04-05 12:30:18 -07:00
userfaultfd.c	userfaultfd: shmem: wire up shmem_mfill_zeropage_pte	2017-09-06 17:27:28 -07:00
util.c	mm: rename global_page_state to global_zone_page_state	2017-09-06 17:27:29 -07:00
vmacache.c	mm: get rid of vmacache_flush_all() entirely	2018-09-19 22:43:48 +02:00
vmalloc.c	mm: vmalloc: avoid racy handling of debugobjects in vunmap	2018-08-03 07:50:23 +02:00
vmpressure.c	mm, vmpressure: pass-through notification support	2017-07-10 16:32:31 -07:00
vmscan.c	mm: fix the NULL mapping case in __isolate_lru_page()	2018-06-05 11:41:54 +02:00
vmstat.c	Revert mm/vmstat.c: fix vmstat_update() preemption BUG	2018-07-11 16:29:24 +02:00
workingset.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
z3fold.c	z3fold: fix memory leak	2018-05-30 07:52:23 +02:00
zbud.c	mm/zbud.c: use list_last_entry() instead of list_tail_entry()	2016-01-15 11:40:52 -08:00
zpool.c	mm: zsmalloc: constify struct zs_pool name	2015-11-06 17:50:42 -08:00
zsmalloc.c	zsmalloc: calling zs_map_object() from irq is a bug	2017-12-14 09:53:10 +01:00
zswap.c	zswap: re-check zswap_is_full() after do zswap_shrink()	2018-09-05 09:26:30 +02:00