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mm, hwpoison: use __PageMovable() to detect non-lru movable pages 

It's more recommended to use __PageMovable() to detect non-lru movable
pages. We can avoid bumping page refcnt via isolate_movable_page() for
the isolated lru pages. Also if pages become PageLRU just after they're
checked but before trying to isolate them, isolate_lru_page() will be
called to do the right work.

[linmiaohe@huawei.com: fixes per Naoya Horiguchi]
  Link: https://lkml.kernel.org/r/1f7ee86e-7d28-0d8c-e0de-b7a5a94519e8@huawei.com
Link: https://lkml.kernel.org/r/20220830123604.25763-3-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: 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 20:36:00 +08:00 committed by Andrew Morton
parent 2fe62e2226
commit da29499124
1 changed files with 9 additions and 7 deletions
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16
mm/memory-failure.c
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@ -2407,24 +2407,26 @@ EXPORT_SYMBOL(unpoison_memory);
static bool isolate_page(struct page *page, struct list_head *pagelist)
{
bool isolated = false;
bool lru = PageLRU(page);
if (PageHuge(page)) {
isolated = !isolate_hugetlb(page, pagelist);
} else {
bool lru = !__PageMovable(page);
if (lru)
isolated = !isolate_lru_page(page);
else
isolated = !isolate_movable_page(page, ISOLATE_UNEVICTABLE);
isolated = !isolate_movable_page(page,
ISOLATE_UNEVICTABLE);
if (isolated)
if (isolated) {
list_add(&page->lru, pagelist);
if (lru)
inc_node_page_state(page, NR_ISOLATED_ANON +
page_is_file_lru(page));
}
}
if (isolated && lru)
inc_node_page_state(page, NR_ISOLATED_ANON +
page_is_file_lru(page));
/*
* If we succeed to isolate the page, we grabbed another refcount on
* the page, so we can safely drop the one we got from get_any_pages().