From: Oscar Salvador <osalvador@xxxxxxx> Subject: 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@xxxxxxx Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/madvise.c | 5 ----- 1 file changed, 5 deletions(-) --- a/mm/madvise.c~mmhwpoison-drop-unneeded-pcplist-draining +++ a/mm/madvise.c @@ -877,7 +877,6 @@ static long madvise_remove(struct vm_are 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 beha 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 _
