linux-kernel - Re: [PATCH -next] mm/compaction: no stuck in __reset_isolation

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Message-ID: <20190206085158.GM9565@techsingularity.net>
Date:   Wed, 6 Feb 2019 08:51:58 +0000
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Qian Cai <cai@....pw>
Cc:     akpm@...ux-foundation.org, vbabka@...e.cz, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] mm/compaction: no stuck in __reset_isolation_pfn()

On Tue, Feb 05, 2019 at 10:47:32PM -0500, Qian Cai wrote:
> The commit c68d77911c23 ("mm, compaction: be selective about what
> pageblocks to clear skip hints") introduced an infinite loop if a pfn is
> invalid, it will loop again without increasing page counters. It can be
> reproduced by running LTP tests on an arm64 server.
> 

That was careless of me but the patch looks
correct. Andrew, this is a fix to the mmotm patch
mm-compaction-be-selective-about-what-pageblocks-to-clear-skip-hints.patch

Acked-by: Mel Gorman <mgorman@...hsingularity.net>

Thanks Qian!

-- 
Mel Gorman
SUSE Labs