[PATCH 4/4] mm,hwpoison: Drop unneeded pcplist draining
From: Oscar Salvador
Date: Wed Sep 02 2020 - 05:45:31 EST
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.
Signed-off-by: Oscar Salvador <osalvador@xxxxxxx>
---
mm/madvise.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/mm/madvise.c b/mm/madvise.c
index e92e06890b08..e7cdfabd8aca 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -930,10 +930,6 @@ 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