Tianyang Zhang
251bfa6997
mm/page_alloc.c: avoid infinite retries caused by cpuset race ...
commit e05741fb10c38d70bbd7ec12b23c197b6355d519 upstream.
__alloc_pages_slowpath has no change detection for ac->nodemask in the
part of retry path, while cpuset can modify it in parallel. For some
processes that set mempolicy as MPOL_BIND, this results ac->nodemask
changes, and then the should_reclaim_retry will judge based on the latest
nodemask and jump to retry, while the get_page_from_freelist only
traverses the zonelist from ac->preferred_zoneref, which selected by a
expired nodemask and may cause infinite retries in some cases
cpu 64:
__alloc_pages_slowpath {
/* ..... */
retry:
/* ac->nodemask = 0x1, ac->preferred->zone->nid = 1 */
if (alloc_flags & ALLOC_KSWAPD)
wake_all_kswapds(order, gfp_mask, ac);
/* cpu 1:
cpuset_write_resmask
update_nodemask
update_nodemasks_hier
update_tasks_nodemask
mpol_rebind_task
mpol_rebind_policy
mpol_rebind_nodemask
// mempolicy->nodes has been modified,
// which ac->nodemask point to
*/
/* ac->nodemask = 0x3, ac->preferred->zone->nid = 1 */
if (should_reclaim_retry(gfp_mask, order, ac, alloc_flags,
did_some_progress > 0, &no_progress_loops))
goto retry;
}
Simultaneously starting multiple cpuset01 from LTP can quickly reproduce
this issue on a multi node server when the maximum memory pressure is
reached and the swap is enabled
Link: https://lkml.kernel.org/r/20250416082405.20988-1-zhangtianyang@loongson.cn
Fixes: c33d6c06f6
2025-06-04 14:32:36 +02:00
panic: Consolidate open-coded panic_on_warn checks
2023-02-06 07:52:50 +01:00
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
2021-12-14 14:49:00 +01:00
mm/cma: use nth_page() in place of direct struct page manipulation
2023-11-28 16:50:19 +00:00
mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations
2024-04-13 12:51:34 +02:00
mm: allow a controlled amount of unfairness in the page lock
2023-08-30 16:27:26 +02:00
v4l2: don't fall back to follow_pfn() if pin_user_pages_fast() fails
2022-12-08 11:23:06 +01:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page
2022-12-19 12:24:15 +01:00
mm/thp: check and bail out if page in deferred queue already
2023-03-11 16:44:05 +01:00
mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page
2022-12-19 12:24:15 +01:00
mm/thp: fix vma_address() if virtual address below file offset
2021-06-30 08:47:52 -04:00
mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING
2020-12-16 10:56:59 +01:00
mm/khugepaged: fix collapse_pte_mapped_thp() to allow anon_vma
2023-01-24 07:18:01 +01:00
Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()"
2022-09-15 12:04:49 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
mm: list_lru: set shrinker map bit when child nr_items is not zero
2020-12-11 13:23:31 +01:00
mm: fix madivse_pageout mishandling on non-LRU page
2022-10-05 10:37:43 +02:00
Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."
2023-02-22 12:50:39 +01:00
memcg: always call cond_resched() after fn()
2025-06-04 14:32:35 +02:00
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-08 19:07:49 +01:00
mm/memory-failure: fix an incorrect use of tail pages
2024-04-13 12:51:31 +02:00
mm: avoid leaving partial pfn mappings around in error case
2024-11-17 14:58:53 +01:00
mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn_range()
2021-09-22 12:26:43 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-04-13 12:51:27 +02:00
mm/migrate: set swap entry values of THP tail pages properly.
2024-04-13 12:51:31 +02:00
mm: Fix TLB flush for not-first PFNMAP mappings in unmap_region()
2022-09-20 12:28:00 +02:00
mm: fix kthread_use_mm() vs TLB invalidate
2020-09-03 11:26:51 +02:00
mm/khugepaged: fix GUP-fast interaction by sending IPI
2022-12-14 11:30:42 +01:00
arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
2022-05-15 19:54:46 +02:00
mm/mremap: hold the rmap lock in write mode when moving page table entries.
2022-08-25 11:17:20 +02:00
memcg: fix soft lockup in the OOM process
2025-03-13 12:43:21 +01:00
mm: avoid overflows in dirty throttling logic
2024-08-19 05:33:42 +02:00
mm/page_alloc.c: avoid infinite retries caused by cpuset race
2025-06-04 14:32:36 +02:00
mm: fix unexpected zeroed page mapping with zram swap
2022-05-12 12:23:48 +02:00
mm/memory_hotplug: drain per-cpu pages again during memory offline
2020-09-23 12:40:47 +02:00
mm/page_owner: change split_page_owner to take a count
2020-10-29 09:57:52 +01:00
mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()
2021-06-30 08:47:55 -04:00
mm: pagewalk: Fix race between unmap and page walker
2022-10-15 07:54:36 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
mm/thp: fix __split_huge_pmd_locked() on shmem migration entry
2021-06-30 08:47:52 -04:00
vfs: fix readahead(2) on block devices
2023-11-20 10:30:08 +01:00
mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse
2022-09-05 10:27:46 +02:00
mm: revert "mm: shmem: fix data-race in shmem_getattr()"
2024-12-14 19:44:19 +01:00
mm/shuffle: don't move pages between zones and don't read garbage memmaps
2020-09-03 11:26:51 +02:00
mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag
2021-11-26 10:47:21 +01:00
mm: krealloc: Fix MTE false alarm in __do_krealloc
2024-11-08 16:20:54 +01:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
mm/sparse: add the missing sparse_buffer_fini() in error branch
2021-05-14 09:44:32 +02:00
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
mm/swap_state: fix a data race in swapin_nr_pages
2020-10-01 13:18:08 +02:00
mm/swapfile: skip HugeTLB pages for unuse_vma
2024-11-08 16:20:47 +01:00
mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()
2021-06-30 08:47:53 -04:00
mm/usercopy: return 1 from hardened_usercopy __setup() handler
2022-04-15 14:18:30 +02:00
userfaultfd: fix mmap_changing checking in mfill_atomic_hugetlb
2024-03-01 13:13:33 +01:00
mm: only enforce minimum stack gap size if it's sensible
2024-11-08 16:20:35 +01:00
mm/vunmap: add cond_resched() in vunmap_pmd_range
2020-09-03 11:26:52 +02:00
mm: add missing release barrier on PGDAT_RECLAIM_LOCKED unlock
2025-05-02 07:39:16 +02:00
arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
2022-05-15 19:54:46 +02:00
mm/z3fold: fix potential memory leak in z3fold_destroy_pool()
2021-07-14 16:53:47 +02:00
zsmalloc: fix races between asynchronous zspage free and page migration
2022-06-06 08:33:50 +02:00
251bfa6997