Commit 32409cba authored by Oscar Salvador's avatar Oscar Salvador Committed by Linus Torvalds
Browse files

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: default avatarOscar Salvador <osalvador@suse.de>
Acked-by: default avatarNaoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a8b2c2ce

mm/madvise.c

+0 −5
Original line number Diff line number Diff line
@@ -877,7 +877,6 @@ static long madvise_remove(struct vm_area_struct *vma, 
static int madvise_inject_error(int behavior,

		unsigned long start, unsigned long end)

{

	struct zone *zone;

	unsigned long size;



	if (!capable(CAP_SYS_ADMIN))
@@ -922,10 +921,6 @@ static int madvise_inject_error(int behavior, 
			return ret;

	}



	/* Ensure that all poisoned pages are removed from per-cpu lists */

	for_each_populated_zone(zone)

		drain_all_pages(zone);



	return 0;

}

#endif