Stephen Brennan 2fdd1a8221 mm, vmstat: drop zone->lock in /proc/pagetypeinfo ... Commit 93b3a67448 upstream Commit 93b3a67448 ("mm,vmstat: reduce zone->lock holding time by /proc/pagetypeinfo") upstream caps the number of iterations over each free_list at 100,000, and also drops the zone->lock in between each migrate type. Capping the iteration count alters the file contents in some cases, which means this approach may not be suitable for stable backports. However, dropping zone->lock in between migrate types (and, as a result, page orders) will not change the /proc/pagetypeinfo file contents. It can significantly reduce the length of time spent with IRQs disabled, which can prevent missed interrupts or soft lockups which we have observed on systems with particularly large memory. Thus, this commit is a modified version of the upstream one which only drops the lock in between migrate types. Fixes: 467c996c1e ("Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo") Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com> Reviewed-by: Aruna Ramakrishna <aruna.ramakrishna@oracle.com> Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-06-03 08:36:10 +02:00
..
kasan
backing-dev.c	memcg: fix a crash in wb_workfn when a device disappears	2021-02-23 14:00:30 +01:00
balloon_compaction.c
bootmem.c
cleancache.c
cma.c	mm/cma.c: fail if fixed declaration can't be honored	2019-08-06 19:05:23 +02:00
cma.h
cma_debug.c	mm/cma_debug.c: fix the break condition in cma_maxchunk_get()	2019-06-15 11:54:51 +02:00
compaction.c	mm/compaction.c: clear total_{migrate,free}_scanned before scanning a new zone	2019-10-05 12:48:13 +02:00
debug.c
debug_page_ref.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c	mm/filemap.c: clear page error before actual read	2020-10-01 13:12:40 +02:00
frame_vector.c
frontswap.c
gup.c	gup: document and work around "COW can break either way" issue	2021-04-28 12:08:42 +02:00
highmem.c
hmm.c	mm, hmm: mark hmm_devmem_{add, add_resource} EXPORT_SYMBOL_GPL	2019-01-13 10:01:02 +01:00
huge_memory.c	gup: document and work around "COW can break either way" issue	2021-04-28 12:08:42 +02:00
hugetlb.c	mm/hugeltb: handle the error case in hugetlb_fix_reserve_counts()	2021-05-22 10:57:39 +02:00
hugetlb_cgroup.c	mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()	2019-11-20 17:59:33 +01:00
hwpoison-inject.c
init-mm.c
internal.h	vmscan: return NODE_RECLAIM_NOSCAN in node_reclaim() when CONFIG_NUMA is n	2019-12-05 15:37:51 +01:00
interval_tree.c
Kconfig	mm/hmm: select mmu notifier when selecting HMM	2019-06-15 11:54:51 +02:00
Kconfig.debug
khugepaged.c	khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate()	2021-05-22 10:57:39 +02:00
kmemleak-test.c
kmemleak.c	mm/kmemleak.c: use address-of operator on section symbols	2020-10-01 13:12:40 +02:00
ksm.c	ksm: fix potential missing rmap_item for stable_node	2021-05-22 10:57:39 +02:00
list_lru.c	mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node	2019-06-19 08:20:54 +02:00
maccess.c	uaccess: Add non-pagefault user-space write function	2020-09-09 19:03:11 +02:00
madvise.c
Makefile
memblock.c	memblock: do not start bottom-up allocations with kernel_end	2021-02-23 14:00:32 +01:00
memcontrol.c	mm: writeback: use exact memcg dirty counts	2021-04-07 12:47:03 +02:00
memory-failure.c	mm: hwpoison: fix thp split handing in soft_offline_in_use_page()	2019-03-23 14:35:24 +01:00
memory.c	mm: fix race by making init_zero_pfn() early_initcall	2021-04-07 12:47:02 +02:00
memory_hotplug.c	mm/memory_hotplug: don't access uninitialized memmaps in shrink_zone_span()	2019-12-01 09:14:18 +01:00
mempolicy.c	mm: mempolicy: fix potential pte_unmap_unlock pte error	2020-11-18 18:27:52 +01:00
mempool.c
memtest.c
migrate.c	mm/migrate.c: add missing flush_dcache_page for non-mapped page migrate	2019-04-03 06:25:20 +02:00
mincore.c	mm/mincore.c: make mincore() more conservative	2019-05-21 18:50:16 +02:00
mlock.c	mm/mlock.c: change count_mm_mlocked_page_nr return type	2019-07-10 09:54:36 +02:00
mm_init.c
mmap.c	mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area	2020-10-01 13:12:41 +02:00
mmu_context.c
mmu_notifier.c	mm/mmu_notifier: use hlist_add_head_rcu()	2019-07-31 07:28:56 +02:00
mmzone.c
mprotect.c	mm, numa: fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa	2020-03-11 18:03:02 +01:00
mremap.c	mm: Fix mremap not considering huge pmd devmap	2020-06-11 09:22:57 +02:00
msync.c
nobootmem.c
nommu.c	x86/mm: split vmalloc_sync_all()	2020-04-02 16:34:20 +02:00
oom_kill.c	mm: fix oom_kill event handling	2021-04-07 12:47:03 +02:00
page-writeback.c	mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio()	2020-01-23 08:20:32 +01:00
page_alloc.c	mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged	2020-10-14 09:51:14 +02:00
page_counter.c
page_ext.c	mm/page_ext.c: fix an imbalance with kmemleak	2019-04-05 22:31:27 +02:00
page_idle.c	mm/page_idle.c: fix oops because end_pfn is larger than max_pfn	2019-07-03 13:15:59 +02:00
page_io.c	swap: fix swapfile read/write offset	2021-03-07 11:27:46 +01:00
page_isolation.c
page_owner.c	mm/page_owner.c: remove drain_all_pages from init_early_allocated_pages	2020-07-31 16:44:45 +02:00
page_poison.c	page_poison: play nicely with KASAN	2019-04-05 22:31:28 +02:00
page_vma_mapped.c	mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly	2018-11-13 11:15:08 -08:00
pagewalk.c	mm: pagewalk: fix termination condition in walk_pte_range()	2020-10-01 13:12:32 +02:00
percpu-internal.h
percpu-km.c	percpu: convert spin_lock_irq to spin_lock_irqsave.	2019-02-12 19:46:05 +01:00
percpu-stats.c
percpu-vm.c
percpu.c	percpu: fix first chunk size calculation for populated bitmap	2020-09-23 10:46:36 +02:00
pgtable-generic.c
process_vm_access.c
quicklist.c
readahead.c
rmap.c
rodata_test.c
shmem.c	userfaultfd: release page in error path to avoid BUG_ON	2021-05-22 10:57:39 +02:00
slab.c	mm/slab.c: fix an infinite loop in leaks_show()	2019-06-15 11:54:51 +02:00
slab.h
slab_common.c	mm/slab: use memzero_explicit() in kzfree()	2020-06-30 15:38:08 -04:00
slob.c
slub.c	Revert "mm, slub: consider rest of partial list if acquire_slab() fails"	2021-03-17 16:34:28 +01:00
sparse-vmemmap.c
sparse.c
swap.c
swap_cgroup.c
swap_slots.c
swap_state.c	mm/swap_state: fix a data race in swapin_nr_pages	2020-10-01 13:12:46 +02:00
swapfile.c	swap: fix swapfile read/write offset	2021-03-07 11:27:46 +01:00
truncate.c	mm: cleancache: fix corruption on missed inode invalidation	2018-12-08 13:03:40 +01:00
usercopy.c	usercopy: Avoid HIGHMEM pfn warning	2019-10-11 18:18:34 +02:00
userfaultfd.c	hugetlb: use same fault hash key for shared and private mappings	2019-05-31 06:47:12 -07:00
util.c	mm: add kvfree_sensitive() for freeing sensitive data objects	2020-06-20 10:24:59 +02:00
vmacache.c
vmalloc.c	mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap()	2020-06-03 08:18:11 +02:00
vmpressure.c
vmscan.c	mm: memcg: make sure memory.events is uptodate when waking pollers	2021-04-07 12:47:03 +02:00
vmstat.c	mm, vmstat: drop zone->lock in /proc/pagetypeinfo	2021-06-03 08:36:10 +02:00
workingset.c
z3fold.c	z3fold: fix possible reclaim races	2018-12-01 09:42:54 +01:00
zbud.c
zpool.c
zsmalloc.c	zsmalloc: account the number of compacted pages correctly	2021-03-07 11:27:46 +01:00
zswap.c