From: Vlastimil Babka <vbabka@suse.cz>
To: Hugh Dickins <hughd@google.com>, Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: mmotm woes, mainly compaction
Date: Tue, 12 Apr 2016 10:03:47 +0200 [thread overview]
Message-ID: <570CABE3.4070404@suse.cz> (raw)
In-Reply-To: <alpine.LSU.2.11.1604120005350.1832@eggly.anvils>
On 04/12/2016 09:18 AM, Hugh Dickins wrote:
> 2. Fix crash in get_pfnblock_flags_mask() from suitable_migration_target()
> from isolate_freepages(): there's a case when that "block_start_pfn -=
> pageblock_nr_pages" loop can pass through 0 and end up trying to access
> a pageblock before the start of the mem_map[]. (I have not worked out
> why this never hit me before 4.6-rc2-mm1, it looks much older.)
This is actually my fresh mmotm bug, thanks for catching that!
Fix for:
mm-compaction-wrap-calculating-first-and-last-pfn-of-pageblock.patch
----8<----
next prev parent reply other threads:[~2016-04-12 8:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-12 7:18 Hugh Dickins
2016-04-12 8:03 ` Vlastimil Babka [this message]
2016-04-12 9:03 ` Vlastimil Babka
2016-04-12 9:14 ` Vlastimil Babka
2016-04-12 9:31 ` Vlastimil Babka
2016-04-12 9:38 ` Vlastimil Babka
2016-04-12 12:10 ` Michal Hocko
2016-04-12 14:51 ` Michal Hocko
2016-04-14 20:15 ` Hugh Dickins
2016-04-14 23:24 ` Vlastimil Babka
2016-04-15 1:00 ` Hugh Dickins
2016-04-18 19:14 ` Vlastimil Babka
2016-04-15 8:42 ` Michal Hocko
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