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mm,hwpoison: drop unneeded pcplist draining 

memory_failure and soft_offline_path paths now drain pcplists by calling
get_hwpoison_page.

memory_failure flags the page as HWPoison before, so that page cannot
longer go into a pcplist, and soft_offline_page only flags a page as
HWPoison if 1) we took the page off a buddy freelist 2) the page was
in-use and we migrated it 3) was a clean pagecache.

Because of that, a page cannot longer be poisoned and be in a pcplist.

Link: https://lkml.kernel.org/r/20201013144447.6706-5-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oscar Salvador 2020-12-14 19:11:35 -08:00 committed by Linus Torvalds
parent a8b2c2ce89
commit 32409cba3f
1 changed files with 0 additions and 5 deletions
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5
mm/madvise.c
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@ -877,7 +877,6 @@ static long madvise_remove(struct vm_area_struct *vma,
static int madvise_inject_error(int behavior, static int madvise_inject_error(int behavior,
unsigned long start, unsigned long end) unsigned long start, unsigned long end)
{ {
struct zone *zone;
unsigned long size; unsigned long size;
if (!capable(CAP_SYS_ADMIN)) if (!capable(CAP_SYS_ADMIN))
@ -922,10 +921,6 @@ static int madvise_inject_error(int behavior,
return ret; return ret;
} }
/* Ensure that all poisoned pages are removed from per-cpu lists */
for_each_populated_zone(zone)
drain_all_pages(zone);
return 0; return 0;
} }
#endif #endif