From: Miaohe Lin <linmiaohe@huawei.com>
To: <akpm@linux-foundation.org>
Cc: <naoya.horiguchi@nec.com>, <mhocko@suse.com>,
<minchan@kernel.org>, <cgoldswo@codeaurora.org>,
<linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
<linmiaohe@huawei.com>
Subject: [PATCH 2/3] mm/memory_hotplug: fix potential permanent lru cache disable
Date: Sat, 21 Aug 2021 17:42:45 +0800 [thread overview]
Message-ID: <20210821094246.10149-3-linmiaohe@huawei.com> (raw)
In-Reply-To: <20210821094246.10149-1-linmiaohe@huawei.com>
If offline_pages failed after lru_cache_disable(), it forgot to do
lru_cache_enable() in error path. So we would have lru cache disabled
permanently in this case.
Fixes: d479960e44f2 ("mm: disable LRU pagevec during the migration temporarily")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/memory_hotplug.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index d986d3791986..9fd0be32a281 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -2033,6 +2033,7 @@ int __ref offline_pages(unsigned long start_pfn, unsigned long nr_pages,
undo_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE);
memory_notify(MEM_CANCEL_OFFLINE, &arg);
failed_removal_pcplists_disabled:
+ lru_cache_enable();
zone_pcp_enable(zone);
failed_removal:
pr_debug("memory offlining [mem %#010llx-%#010llx] failed due to %s\n",
--
2.23.0
next prev parent reply other threads:[~2021-08-21 9:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-21 9:42 [PATCH 0/3] Cleanup and fixups for memory hotplug Miaohe Lin
2021-08-21 9:42 ` [PATCH 1/3] mm/memory_hotplug: use helper zone_is_zone_device() to simplify the code Miaohe Lin
2021-08-23 8:20 ` HORIGUCHI NAOYA(堀口 直也)
2021-08-23 9:11 ` Oscar Salvador
2021-08-23 12:14 ` David Hildenbrand
2021-08-21 9:42 ` Miaohe Lin [this message]
2021-08-23 8:21 ` [PATCH 2/3] mm/memory_hotplug: fix potential permanent lru cache disable HORIGUCHI NAOYA(堀口 直也)
2021-08-23 9:15 ` Oscar Salvador
2021-08-23 11:13 ` Miaohe Lin
2021-08-23 12:15 ` David Hildenbrand
2021-08-21 9:42 ` [PATCH 3/3] mm/memory_hotplug: make HWPoisoned dirty swapcache pages unmovable Miaohe Lin
2021-08-23 8:26 ` HORIGUCHI NAOYA(堀口 直也)
2021-08-23 9:14 ` Miaohe Lin
2021-11-04 22:07 ` Andrew Morton
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