linux-kernel - [PATCH v6 0/4] HWPOISON: soft offlining for non-lru movable page

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Date:   Fri, 3 Feb 2017 15:59:26 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <akpm@...ux-foundation.org>
CC:     <mhocko@...nel.org>, <minchan@...nel.org>, <ak@...ux.intel.com>,
        <guohanjun@...wei.com>, <hannes@...xchg.org>,
        <iamjoonsoo.kim@....com>, <mgorman@...hsingularity.net>,
        <n-horiguchi@...jp.nec.com>, <arbab@...ux.vnet.ibm.com>,
        <izumi.taku@...fujitsu.com>, <vkuznets@...hat.com>,
        <vbabka@...e.cz>, <qiuxishi@...wei.com>
Subject: [PATCH v6 0/4] HWPOISON: soft offlining for non-lru movable page

Hi Michal, Minchan and all,
Could you please help to review it?

Any suggestion is more than welcome. And Thanks for all of you.

After Minchan's commit bda807d44454 ("mm: migrate: support non-lru movable
page migration"), some type of non-lru page like zsmalloc and
virtio-balloon page also support migration.

Therefore, we can:

1) soft offlining no-lru movable pages, which means when memory
   corrected errors occur on a non-lru movable page, we can stop to use it
   by migrating data onto another page and disable the original (maybe
   half-broken) one.

2) enable memory hotplug for non-lru movable pages, i.e.  we may
   offline blocks, which include such pages, by using non-lru page
   migration.

This patchset is heavily dependent on non-lru movable page migration.
--------
v6:
 * just return -EBUSY for isolate_movable_page when it failed to isolate
   a non-lru movable page, which suggested by Minchan.

v5:
 * change the return type of isolate_movable_page() from bool to int as
   Michal's suggestion.
 * add "enable memory hotplug for non-lru movable pages" to this patchset,
   which also make some change as Michal's suggestion here.

v4:
 * make isolate_movable_page always defined to avoid compile error with
   CONFIG_MIGRATION = n
 * return -EBUSY when isolate_movable_page return false which means failed
   to isolate movable page.

v3:
  * delete some unneed limitation and use !__PageMovable instead of PageLRU
    after isolate page to avoid isolated count mismatch, as Minchan Kim's suggestion.

v2:
 * delete function soft_offline_movable_page() and hanle non-lru movable
   page in __soft_offline_page() as Michal Hocko suggested.

Yisheng Xie (4):
  mm/migration: make isolate_movable_page() return int type
  mm/migration: make isolate_movable_page always defined
  HWPOISON: soft offlining for non-lru movable page
  mm/hotplug: enable memory hotplug for non-lru movable pages

 include/linux/migrate.h |  4 +++-
 mm/compaction.c         |  2 +-
 mm/memory-failure.c     | 26 ++++++++++++++++----------
 mm/memory_hotplug.c     | 28 +++++++++++++++++-----------
 mm/migrate.c            |  6 +++---
 mm/page_alloc.c         |  8 ++++++--
 6 files changed, 46 insertions(+), 28 deletions(-)

-- 
1.7.12.4