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| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-08-30 20:36:02 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:04 -0700 |
| commit | 36537a67d3561bfe2b3654161d6c9008fff84d43 (patch) | |
| tree | e934fba765591216b9d95fbde6f99f2d9e728488 /mm/memory-failure.c | |
| parent | 21c9e90ab9a4c991d21dd15cc5163c99a885d4a8 (diff) | |
| download | linux-stable-36537a67d3561bfe2b3654161d6c9008fff84d43.tar.gz linux-stable-36537a67d3561bfe2b3654161d6c9008fff84d43.tar.bz2 linux-stable-36537a67d3561bfe2b3654161d6c9008fff84d43.zip | |
mm, hwpoison: avoid unneeded page_mapped_in_vma() overhead in collect_procs_anon()
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>
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 01ce87f5706a..cca8264dda1b 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -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); |