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/20200908075626.11976-5-osalvador@xxxxxxx Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxxxx> Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx> Cc: Oscar Salvador <osalvador@xxxxxxxx> Cc: Qian Cai <cai@xxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> --- mm/madvise.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/mm/madvise.c b/mm/madvise.c index 4ce66bab53dd..4bac8e85497a 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -917,10 +917,6 @@ 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 -- 2.26.2
