The patch titled
Subject: mm, hwpoison: avoid unneeded page_mapped_in_vma() overhead in collect_procs_anon()
has been added to the -mm mm-unstable branch. Its filename is
mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm, hwpoison: avoid unneeded page_mapped_in_vma() overhead in collect_procs_anon()
Date: Tue, 30 Aug 2022 20:36:02 +0800
If vma->vm_mm != t->mm, there's no need to call page_mapped_in_vma() as
add_to_kill() won't be called in this case. Move up the mm check to avoid
possible unneeded calling to page_mapped_in_vma().
Link: https://lkml.kernel.org/r/20220830123604.25763-5-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/memory-failure.c~mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon
+++ a/mm/memory-failure.c
@@ -521,11 +521,11 @@ static void collect_procs_anon(struct pa
anon_vma_interval_tree_foreach(vmac, &av->rb_root,
pgoff, pgoff) {
vma = vmac->vma;
+ if (vma->vm_mm != t->mm)
+ continue;
if (!page_mapped_in_vma(page, vma))
continue;
- if (vma->vm_mm == t->mm)
- add_to_kill(t, page, FSDAX_INVALID_PGOFF, vma,
- to_kill);
+ add_to_kill(t, page, FSDAX_INVALID_PGOFF, vma, to_kill);
}
}
read_unlock(&tasklist_lock);
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-page_alloc-minor-clean-up-for-memmap_init_compound.patch
hugetlb_cgroup-remove-unneeded-nr_pages-0-check.patch
hugetlb_cgroup-hugetlbfs-use-helper-macro-sz_1kmg.patch
hugetlb_cgroup-remove-unneeded-return-value.patch
hugetlb_cgroup-use-helper-macro-numa_no_node.patch
hugetlb_cgroup-use-helper-for_each_hstate-and-hstate_index.patch
mm-hugetlb-fix-incorrect-update-of-max_huge_pages.patch
mm-hugetlb-fix-warn_onkobj-in-sysfs_create_group.patch
mm-hugetlb-fix-missing-call-to-restore_reserve_on_error.patch
mm-hugetlb-fix-missing-call-to-restore_reserve_on_error-v2.patch
mm-hugetlb_vmemmap-add-missing-smp_wmb-before-set_pte_at.patch
mm-hugetlb-fix-sysfs-group-leak-in-hugetlb_unregister_node.patch
mm-hugetlb-make-detecting-shared-pte-more-reliable.patch
mm-hwpoison-fix-page-refcnt-leaking-in-try_memory_failure_hugetlb.patch
mm-hwpoison-fix-page-refcnt-leaking-in-unpoison_memory.patch
mm-hwpoison-fix-extra-put_page-in-soft_offline_page.patch
mm-hwpoison-fix-possible-use-after-free-in-mf_dax_kill_procs-v2.patch
mm-hwpoison-kill-procs-if-unmap-fails.patch
mm-hwpoison-kill-procs-if-unmap-fails-v2.patch
mm-hwpoison-avoid-trying-to-unpoison-reserved-page.patch
mm-hwpoison-use-clearpagehwpoison-in-memory_failure.patch
mm-hwpoison-use-__pagemovable-to-detect-non-lru-movable-pages.patch
mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
mm-hwpoison-check-pagetable-explicitly-in-hwpoison_user_mappings.patch
mm-hwpoison-cleanup-some-obsolete-comments.patch
