Vlastimil Babka 95e7a450b8 Revert "mm/compaction: fix set skip in fast_find_migrateblock" ... This reverts commit 7efc3b7261. We have got openSUSE reports (Link 1) for 6.1 kernel with khugepaged stalling CPU for long periods of time. Investigation of tracepoint data shows that compaction is stuck in repeating fast_find_migrateblock() based migrate page isolation, and then fails to migrate all isolated pages. Commit 7efc3b7261 ("mm/compaction: fix set skip in fast_find_migrateblock") was suspected as it was merged in 6.1 and in theory can indeed remove a termination condition for fast_find_migrateblock() under certain conditions, as it removes a place that always marks a scanned pageblock from being re-scanned. There are other such places, but those can be skipped under certain conditions, which seems to match the tracepoint data. Testing of revert also appears to have resolved the issue, thus revert the commit until a more robust solution for the original problem is developed. It's also likely this will fix qemu stalls with 6.1 kernel reported in Link 2, but that is not yet confirmed. Link: https://bugzilla.suse.com/show_bug.cgi?id=1206848 Link: https://lore.kernel.org/kvm/b8017e09-f336-3035-8344-c549086c2340@kernel.org/ Link: https://lore.kernel.org/lkml/20230125134434.18017-1-mgorman@techsingularity.net/ Fixes: 7efc3b7261 ("mm/compaction: fix set skip in fast_find_migrateblock") Cc: <stable@vger.kernel.org> Tested-by: Pedro Falcato <pedro.falcato@gmail.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2023-01-29 10:38:43 -08:00
..
damon	mm/damon: use kstrtobool() instead of strtobool()	2022-11-30 15:58:45 -08:00
kasan	kasan: mark kasan_kunit_executing as static	2023-01-11 16:14:21 -08:00
kfence	hardening updates for v6.2-rc1	2022-12-14 12:20:00 -08:00
kmsan	kmsan: export kmsan_handle_urb	2022-12-21 14:31:52 -08:00
Kconfig	New Feature:	2022-12-17 14:06:53 -06:00
Kconfig.debug	mm, slub: add CONFIG_SLUB_TINY	2022-11-27 23:38:02 +01:00
Makefile	…
backing-dev.c	mm: add /sys/class/bdi/<bdi>/min_ratio_fine knob	2022-11-30 15:59:06 -08:00
balloon_compaction.c	…
bootmem_info.c	…
cma.c	…
cma.h	…
cma_debug.c	…
cma_sysfs.c	…
compaction.c	Revert "mm/compaction: fix set skip in fast_find_migrateblock"	2023-01-29 10:38:43 -08:00
debug.c	mm,thp,rmap: simplify compound page mapcount handling	2022-11-30 15:58:46 -08:00
debug_page_ref.c	…
debug_vm_pgtable.c	mm: remove unused savedwrite infrastructure	2022-11-30 15:58:49 -08:00
dmapool.c	…
early_ioremap.c	…
fadvise.c	mm/fadvise: use LLONG_MAX instead of -1 for eof	2022-12-11 18:12:11 -08:00
failslab.c	mm: fix unexpected changes to {failslab|fail_page_alloc}.attr	2022-11-22 18:50:44 -08:00
filemap.c	filemap: convert replace_page_cache_page() to replace_page_cache_folio()	2022-12-11 18:12:12 -08:00
folio-compat.c	folio-compat: remove lru_cache_add()	2022-12-11 18:12:13 -08:00
frontswap.c	…
gup.c	New Feature:	2022-12-17 14:06:53 -06:00
gup_test.c	mm/gup_test: free memory allocated via kvcalloc() using kvfree()	2022-12-15 16:37:48 -08:00
gup_test.h	mm/gup_test: start/stop/read functionality for PIN LONGTERM test	2022-11-08 17:37:15 -08:00
highmem.c	highmem: fix kmap_to_page() for kmap_local_page() addresses	2022-10-12 18:51:51 -07:00
hmm.c	mm: Remove pointless barrier() after pmdp_get_lockless()	2022-12-15 10:37:27 -08:00
huge_memory.c	ARM64:	2022-12-15 11:12:21 -08:00
hugetlb.c	mm: update mmap_sem comments to refer to mmap_lock	2023-01-11 16:14:22 -08:00
hugetlb_cgroup.c	mm/hugeltb_cgroup: convert hugetlb_cgroup_commit_charge*() to folios	2022-11-30 15:58:43 -08:00
hugetlb_vmemmap.c	mm/hugetlb_vmemmap: remap head page to newly allocated page	2022-11-30 15:58:47 -08:00
hugetlb_vmemmap.h	…
hwpoison-inject.c	…
init-mm.c	…
internal.h	mm/hwpoison: introduce per-memory_block hwpoison counter	2022-11-08 17:37:22 -08:00
interval_tree.c	…
io-mapping.c	…
ioremap.c	…
khugepaged.c	mm/MADV_COLLAPSE: don't expand collapse when vm_end is past requested end	2023-01-11 16:14:20 -08:00
kmemleak.c	mm/kmemleak: use %pK to display kernel pointers in backtrace	2022-12-15 16:37:49 -08:00
ksm.c	mm/ksm: convert break_ksm() to use walk_page_range_vma()	2022-12-11 18:12:09 -08:00
list_lru.c	…
maccess.c	maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault()	2022-11-11 11:44:46 -08:00
madvise.c	mm: update mmap_sem comments to refer to mmap_lock	2023-01-11 16:14:22 -08:00
mapping_dirty_helpers.c	mm: Rename pmd_read_atomic()	2022-12-15 10:37:27 -08:00
memblock.c	mm: Always release pages to the buddy allocator in memblock_free_late().	2023-01-08 18:49:33 +02:00
memcontrol.c	mm: memcg: fix swapcached stat accounting	2022-12-11 18:12:20 -08:00
memfd.c	…
memory-failure.c	mm/memory-failure.c: cleanup in unpoison_memory	2022-11-30 15:59:08 -08:00
memory-tiers.c	mm/demotion: fix NULL vs IS_ERR checking in memory_tier_init	2022-11-30 15:58:54 -08:00
memory.c	mm: remove VM_FAULT_WRITE	2022-12-11 18:12:08 -08:00
memory_hotplug.c	…
mempolicy.c	mm/mempolicy: fix memory leak in set_mempolicy_home_node system call	2022-12-21 14:31:51 -08:00
mempool.c	mempool: do not use ksize() for poisoning	2022-11-30 15:58:41 -08:00
memremap.c	mm/memremap.c: map FS_DAX device memory as decrypted	2022-11-08 15:57:23 -08:00
memtest.c	…
migrate.c	MM patches for 6.2-rc1.	2022-12-13 19:29:45 -08:00
migrate_device.c	mm/migrate_device: return number of migrating pages in args->cpages	2022-11-22 18:50:43 -08:00
mincore.c	mm: convert find_get_incore_page() to filemap_get_incore_folio()	2022-11-08 17:37:18 -08:00
mlock.c	…
mm_init.c	memory: move hotplug memory notifier priority to same file for easy sorting	2022-11-08 17:37:17 -08:00
mm_slot.h	…
mmap.c	mm: update mmap_sem comments to refer to mmap_lock	2023-01-11 16:14:22 -08:00
mmap_lock.c	…
mmu_gather.c	mm: mmu_gather: allow more than one batch of delayed rmaps	2022-12-11 18:12:21 -08:00
mmu_notifier.c	…
mmzone.c	…
mprotect.c	New Feature:	2022-12-17 14:06:53 -06:00
mremap.c	mm, mremap: fix mremap() expanding vma with addr inside vma	2022-12-21 14:31:51 -08:00
msync.c	…
nommu.c	nommu: fix split_vma() map_count error	2023-01-11 16:14:23 -08:00
oom_kill.c	…
page-writeback.c	mm: add bdi_set_min_ratio_no_scale() function	2022-11-30 15:59:06 -08:00
page_alloc.c	mm/page_alloc: update comments in __free_pages_ok()	2022-12-11 18:12:17 -08:00
page_counter.c	…
page_ext.c	Merge branch 'mm-hotfixes-stable' into mm-stable	2022-11-30 14:58:42 -08:00
page_idle.c	…
page_io.c	use less confusing names for iov_iter direction initializers	2022-11-25 13:01:55 -05:00
page_isolation.c	mm/page_isolation: fix clang deadcode warning	2022-10-28 13:37:22 -07:00
page_owner.c	…
page_poison.c	…
page_reporting.c	mm/page_reporting: Add checks for page_reporting_order param	2022-11-28 16:48:19 +00:00
page_reporting.h	…
page_table_check.c	mm: use kstrtobool() instead of strtobool()	2022-11-30 15:58:45 -08:00
page_vma_mapped.c	…
pagewalk.c	mm/pagewalk: add walk_page_range_vma()	2022-12-11 18:12:08 -08:00
percpu-internal.h	…
percpu-km.c	…
percpu-stats.c	…
percpu-vm.c	…
percpu.c	mm/percpu.c: remove the lcm code since block size is fixed at page size	2022-11-07 22:59:18 -08:00
pgalloc-track.h	…
pgtable-generic.c	…
process_vm_access.c	use less confusing names for iov_iter direction initializers	2022-11-25 13:01:55 -05:00
ptdump.c	…
readahead.c	…
rmap.c	mm,thp,rmap: fix races between updates of subpages_mapcount	2022-12-11 18:12:20 -08:00
rodata_test.c	…
secretmem.c	…
shmem.c	mm/shmem: restore SHMEM_HUGE_DENY precedence over MADV_COLLAPSE	2023-01-11 16:14:20 -08:00
shrinker_debug.c	…
shuffle.c	…
shuffle.h	…
slab.c	mm, slab: periodically resched in drain_freelist()	2023-01-02 09:31:05 +01:00
slab.h	Merge branch 'slub-tiny-v1r6' into slab/for-next	2022-12-01 00:14:00 +01:00
slab_common.c	hardening updates for v6.2-rc1	2022-12-14 12:20:00 -08:00
slob.c	…
slub.c	MM patches for 6.2-rc1.	2022-12-13 19:29:45 -08:00
sparse-vmemmap.c	mm/sparse-vmemmap: generalise vmemmap_populate_hugepages()	2022-12-11 18:12:12 -08:00
sparse.c	mm/hwpoison: introduce per-memory_block hwpoison counter	2022-11-08 17:37:22 -08:00
swap.c	mm: teach release_pages() to take an array of encoded page pointers too	2022-11-30 15:58:50 -08:00
swap.h	mm: convert find_get_incore_page() to filemap_get_incore_folio()	2022-11-08 17:37:18 -08:00
swap_cgroup.c	…
swap_slots.c	…
swap_state.c	mm: mmu_gather: prepare to gather encoded page pointers with flags	2022-11-30 15:58:50 -08:00
swapfile.c	MM patches for 6.2-rc1.	2022-12-13 19:29:45 -08:00
truncate.c	folio-compat: remove lru_cache_add()	2022-12-11 18:12:13 -08:00
usercopy.c	mm: use kstrtobool() instead of strtobool()	2022-11-30 15:58:45 -08:00
userfaultfd.c	New Feature:	2022-12-17 14:06:53 -06:00
util.c	mm,thp,rmap: simplify compound page mapcount handling	2022-11-30 15:58:46 -08:00
vmalloc.c	mm: vmalloc: use trace_free_vmap_area_noflush event	2022-11-08 17:37:17 -08:00
vmpressure.c	…
vmscan.c	New Feature:	2022-12-17 14:06:53 -06:00
vmstat.c	mm: vmscan: split khugepaged stats from direct reclaim stats	2022-11-30 15:58:41 -08:00
workingset.c	folio-compat: remove lru_cache_add()	2022-12-11 18:12:13 -08:00
z3fold.c	zpool: clean out dead code	2022-12-11 18:12:10 -08:00
zbud.c	zpool: clean out dead code	2022-12-11 18:12:10 -08:00
zpool.c	zpool: clean out dead code	2022-12-11 18:12:10 -08:00
zsmalloc.c	zsmalloc: implement writeback mechanism for zsmalloc	2022-12-11 18:12:10 -08:00
zswap.c	zswap: fix writeback lock ordering for zsmalloc	2022-12-11 18:12:09 -08:00