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mm, hwpoison: avoid unneeded page_mapped_in_vma() overhead in collect_procs_anon()

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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@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-08-30 20:36:02 +08:00 committed by Andrew Morton
parent 21c9e90ab9
commit 36537a67d3
1 changed files with 3 additions and 3 deletions
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6
mm/memory-failure.c
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@ -521,11 +521,11 @@ static void collect_procs_anon(struct page *page, struct list_head *to_kill,
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);