The patch titled
Subject: mm,hwpoison: drop unneeded pcplist draining
has been added to the -mm tree. Its filename is
mmhwpoison-drop-unneeded-pcplist-draining.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mmhwpoison-drop-unneeded-pcplist-draining.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mmhwpoison-drop-unneeded-pcplist-draining.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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
_
Patches currently in -mm which might be from osalvador@xxxxxxx are
mmhwpoison-drain-pcplists-before-bailing-out-for-non-buddy-zero-refcount-page.patch
mmhwpoison-take-free-pages-off-the-buddy-freelists.patch
mmhwpoison-take-free-pages-off-the-buddy-freelists-for-hugetlb.patch
mmhwpoison-drop-unneeded-pcplist-draining.patch
