Johannes Weiner 726d061fbd mm: vmscan: kick flushers when we encounter dirty pages on the LRU ... Memory pressure can put dirty pages at the end of the LRU without anybody running into dirty limits. Don't start writing individual pages from kswapd while the flushers might be asleep. Unlike the old direct reclaim flusher wakeup (removed in the next patch) that flushes the number of pages just scanned, this patch wakes the flushers for all outstanding dirty pages. That seemed to perform better in a synthetic test that pushes dirty pages to the end of the LRU and into reclaim, because we know LRU aging outstrips writeback already, and this way we give younger dirty pages a headstart rather than wait until reclaim runs into them as well. It also means less plugging and risk of exhausting the struct request pool from reclaim. There is a concern that this will cause temporary files that used to get dirtied and truncated before writeback to now get written to disk under memory pressure. If this turns out to be a real problem, we'll have to revisit this and tame the reclaim flusher wakeups. [hannes@cmpxchg.org: mention dirty expiration as a condition] Link: http://lkml.kernel.org/r/20170126174739.GA30636@cmpxchg.org Link: http://lkml.kernel.org/r/20170123181641.23938-3-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-02-24 17:46:54 -08:00
..
kasan	arm64 updates for 4.11:	2017-02-22 10:46:44 -08:00
backing-dev.c	mm/backing-dev.c: use rb_entry()	2017-02-22 16:41:30 -08:00
balloon_compaction.c	mm: balloon: use general non-lru movable page feature	2016-07-26 16:19:19 -07:00
bootmem.c	mm/bootmem.c: cosmetic improvement of code readability	2017-02-22 16:41:29 -08:00
cleancache.c	cleancache: constify cleancache_ops structure	2016-01-27 09:09:57 -05:00
cma_debug.c
cma.c	mm/cma: Cleanup highmem check	2017-01-11 13:56:49 +00:00
cma.h
compaction.c	mm,compaction: serialize waitqueue_active() checks	2017-02-22 16:41:29 -08:00
debug_page_ref.c	mm/page_ref: add tracepoint to track down page reference manipulation	2016-03-17 15:09:34 -07:00
debug.c	mm, debug: print raw struct page data in __dump_page()	2016-12-12 18:55:08 -08:00
dmapool.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
early_ioremap.c
fadvise.c	mm: fadvise: avoid expensive remote LRU cache draining after FADV_DONTNEED	2016-12-20 09:48:46 -08:00
failslab.c	mm: fault-inject take over bootstrap kmem_cache check	2016-03-15 16:55:16 -07:00
filemap.c	mm: fix filemap.c kernel-doc warnings	2017-02-22 16:41:29 -08:00
frame_vector.c	mm: replace get_vaddr_frames() write/force parameters with gup_flags	2016-10-19 08:11:24 -07:00
frontswap.c	mm, frontswap: convert frontswap_enabled to static key	2016-07-26 16:19:19 -07:00
gup.c	userfaultfd: hugetlbfs: gup: support VM_FAULT_RETRY	2017-02-22 16:41:28 -08:00
highmem.c	mm/highmem: make nr_free_highpages() handles all highmem zones by itself	2016-05-19 19:12:14 -07:00
huge_memory.c	mm, thp: add new defer+madvise defrag option	2017-02-22 16:41:30 -08:00
hugetlb_cgroup.c	mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size	2016-05-20 17:58:30 -07:00
hugetlb.c	userfaultfd: hugetlbfs: add UFFDIO_COPY support for shared mappings	2017-02-22 16:41:28 -08:00
hwpoison-inject.c
init-mm.c	mm: Add a user_ns owner to mm_struct and fix ptrace permission checks	2016-11-22 11:49:48 -06:00
internal.h	oom-reaper: use madvise_dontneed() logic to decide if unmap the VMA	2017-02-22 16:41:30 -08:00
interval_tree.c
Kconfig	mm: THP page cache support for ppc64	2016-12-12 18:55:08 -08:00
Kconfig.debug	PM / Hibernate: allow hibernation with PAGE_POISONING_ZERO	2016-09-13 02:35:27 +02:00
khugepaged.c	mm: get rid of __GFP_OTHER_NODE	2017-01-10 18:31:55 -08:00
kmemcheck.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak-test.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak.c	kmemleak: fix reference to Documentation	2016-12-12 18:55:07 -08:00
ksm.c	mm/ksm: improve deduplication of zero pages with colouring	2017-02-24 17:46:53 -08:00
list_lru.c	mm/list_lru.c: avoid error-path NULL pointer deref	2016-10-27 18:43:42 -07:00
maccess.c	x86: remove more uaccess_32.h complexity	2016-05-22 17:21:27 -07:00
madvise.c	userfaultfd: non-cooperative: add madvise() event for MADV_REMOVE request	2017-02-24 17:46:54 -08:00
Makefile	mm/swap: add cache for swap slots allocation	2017-02-22 16:41:30 -08:00
memblock.c	memblock: embed memblock type name within struct memblock_type	2017-02-24 17:46:54 -08:00
memcontrol.c	slab: use memcg_kmem_cache_wq for slab destruction operations	2017-02-22 16:41:27 -08:00
memory_hotplug.c	mm/memory_hotplug.c: unexport __remove_pages()	2017-02-24 17:46:53 -08:00
memory-failure.c	mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked	2016-12-25 11:54:48 -08:00
memory.c	mm: drop unused argument of zap_page_range()	2017-02-22 16:41:30 -08:00
mempolicy.c	mm/mempolicy.c: do not put mempolicy before using its nodemask	2017-01-24 16:26:14 -08:00
mempool.c	Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"	2016-07-28 16:07:41 -07:00
memtest.c
migrate.c	mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked	2016-12-25 11:54:48 -08:00
mincore.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
mlock.c	thp: fix corner case of munlock() of PTE-mapped THPs	2016-11-30 16:32:52 -08:00
mm_init.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mmap.c	powerpc: do not make the entire heap executable	2017-02-22 16:41:29 -08:00
mmu_context.c	mm/mmu_context, sched/core: Fix mmu_context.h assumption	2016-04-28 11:44:19 +02:00
mmu_notifier.c	fix Christoph's email addresses	2016-03-17 15:09:34 -07:00
mmzone.c	mm/mmzone.c: swap likely to unlikely as code logic is different for next_zones_zonelist()	2017-02-22 16:41:29 -08:00
mprotect.c	mm: mprotect: use pmd_trans_unstable instead of taking the pmd_lock	2017-02-22 16:41:29 -08:00
mremap.c	userfaultfd: non-cooperative: optimize mremap_userfaultfd_complete()	2017-02-22 16:41:28 -08:00
msync.c
nobootmem.c	mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping	2016-10-11 15:06:33 -07:00
nommu.c	lib/show_mem.c: teach show_mem to work with the given nodemask	2017-02-22 16:41:30 -08:00
oom_kill.c	mm, oom: header nodemask is NULL when cpusets are disabled	2017-02-24 17:46:53 -08:00
page_alloc.c	mm, page_alloc: warn_alloc nodemask is NULL when cpusets are disabled	2017-02-22 16:41:30 -08:00
page_counter.c
page_ext.c	mm/page_ext: support extra space allocation by page_ext user	2016-10-07 18:46:27 -07:00
page_idle.c	mm, vmscan: move lru_lock to the node	2016-07-28 16:07:41 -07:00
page_io.c	writeback: add wbc_to_write_flags()	2016-11-02 10:24:03 -06:00
page_isolation.c	mm, page_alloc: avoid page_to_pfn() when merging buddies	2017-02-22 16:41:27 -08:00
page_owner.c	mm/page_owner: don't define fields on struct page_ext by hard-coding	2016-10-07 18:46:27 -07:00
page_poison.c	mm: check the return value of lookup_page_ext for all call sites	2016-06-03 15:06:22 -07:00
page-writeback.c	block: Use pointer to backing_dev_info from request_queue	2017-02-02 08:20:48 -07:00
pagewalk.c	thp: rename split_huge_page_pmd() to split_huge_pmd()	2016-01-15 17:56:32 -08:00
percpu-km.c	mm: percpu: use pr_fmt to prefix output	2016-03-17 15:09:34 -07:00
percpu-vm.c
percpu.c	Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2016-12-13 12:34:47 -08:00
pgtable-generic.c	mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range	2016-03-17 15:09:34 -07:00
process_vm_access.c	mm: unexport __get_user_pages_unlocked()	2016-12-14 16:04:09 -08:00
quicklist.c	fix Christoph's email addresses	2016-03-17 15:09:34 -07:00
readahead.c	mm: don't cap request size based on read-ahead setting	2016-12-12 18:55:08 -08:00
rmap.c	mm, rmap: handle anon_vma_prepare() common case inline	2016-12-12 18:55:08 -08:00
shmem.c	userfaultfd: shmem: avoid leaking blocks and used blocks in UFFDIO_COPY	2017-02-22 16:41:29 -08:00
slab_common.c	slab: use memcg_kmem_cache_wq for slab destruction operations	2017-02-22 16:41:27 -08:00
slab.c	slab: introduce __kmemcg_cache_deactivate()	2017-02-22 16:41:27 -08:00
slab.h	slab: remove synchronous synchronize_sched() from memcg cache deactivation path	2017-02-22 16:41:27 -08:00
slob.c	slab: introduce __kmemcg_cache_deactivate()	2017-02-22 16:41:27 -08:00
slub.c	slub: make sysfs directories for memcg sub-caches optional	2017-02-22 16:41:27 -08:00
sparse-vmemmap.c	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
sparse.c	mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next	2017-02-22 16:41:29 -08:00
swap_cgroup.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
swap_slots.c	mm/swap: skip readahead only when swap slot cache is enabled	2017-02-22 16:41:30 -08:00
swap_state.c	mm/swap: skip readahead only when swap slot cache is enabled	2017-02-22 16:41:30 -08:00
swap.c	mm/swap: split swap cache into 64MB trunks	2017-02-22 16:41:30 -08:00
swapfile.c	mm/swap: enable swap slots cache usage	2017-02-22 16:41:30 -08:00
truncate.c	mm: Invalidate DAX radix tree entries only if appropriate	2016-12-26 20:29:24 -08:00
usercopy.c	mm/usercopy: Switch to using lm_alias	2017-01-11 13:56:50 +00:00
userfaultfd.c	userfaultfd: hugetlbfs: add UFFDIO_COPY support for shared mappings	2017-02-22 16:41:28 -08:00
util.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
vmacache.c	mm: unrig VMA cache hit ratio	2016-10-07 18:46:27 -07:00
vmalloc.c	mm, page_alloc: warn_alloc print nodemask	2017-02-22 16:41:30 -08:00
vmpressure.c	mm/vmpressure.c: fix subtree pressure detection	2016-02-03 08:28:43 -08:00
vmscan.c	mm: vmscan: kick flushers when we encounter dirty pages on the LRU	2017-02-24 17:46:54 -08:00
vmstat.c	mm, compaction: add vmstats for kcompactd work	2017-02-22 16:41:29 -08:00
workingset.c	mm, vmscan: cleanup lru size claculations	2017-02-22 16:41:30 -08:00
z3fold.c	mm/z3fold.c: limit first_num to the actual range of possible buddy indexes	2017-02-22 16:41:31 -08:00
zbud.c	mm/zbud.c: use list_last_entry() instead of list_tail_entry()	2016-01-15 11:40:52 -08:00
zpool.c
zsmalloc.c	mm: fix some typos in mm/zsmalloc.c	2017-02-22 16:41:29 -08:00
zswap.c	zswap: disable changing params if init fails	2017-02-03 14:13:19 -08:00