linux-kernel - Re: [PATCH] mm, page_alloc: Do not wake kswapd with zone lock held

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Date:   Fri, 4 Jan 2019 09:46:08 +0000
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, Qian Cai <cai@....pw>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        syzbot <syzbot+93d94a001cfbce9e60e1@...kaller.appspotmail.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>, linux@...inikbrodowski.net,
        Michal Hocko <mhocko@...e.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: [PATCH] mm, page_alloc: Do not wake kswapd with zone lock held

On Fri, Jan 04, 2019 at 09:18:38AM +0100, Vlastimil Babka wrote:
> On 1/3/19 11:57 PM, Mel Gorman wrote:
> > While zone->flag could have continued to be unused, there is potential
> > for moving some existing fields into the flags field instead. Particularly
> > read-mostly ones like zone->initialized and zone->contiguous.
> > 
> > Reported-by: syzbot+93d94a001cfbce9e60e1@...kaller.appspotmail.com
> > Tested-by: Qian Cai <cai@....pw>
> > Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>
> 
> Fixes: 1c30844d2dfe ("mm: reclaim small amounts of memory when an
> external fragmentation event occurs")
> Acked-by: Vlastimil Babka <vbabka@...e.cz>
> 

Thanks

-- 
Mel Gorman
SUSE Labs