diff mbox series

[140/200] mm,hwpoison: drop unneeded pcplist draining

Message ID 20201215031135.QyeIOFtPU%akpm@linux-foundation.org (mailing list archive)
State New, archived
Headers show
Series [001/200] kthread: add kthread_work tracepoints | expand

Commit Message

Andrew Morton Dec. 15, 2020, 3:11 a.m. UTC
From: Oscar Salvador <osalvador@suse.de>
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@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>
---

 mm/madvise.c |    5 -----
 1 file changed, 5 deletions(-)
diff mbox series

Patch

--- 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