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Reply-To: "Hillf Danton" <hillf.zj@alibaba-inc.com>
From: "Hillf Danton" <hillf.zj@alibaba-inc.com>
To: "'Michal Hocko'" <mhocko@kernel.org>
Cc: "'Sergey Senozhatsky'" <sergey.senozhatsky.work@gmail.com>,
        "'Hugh Dickins'" <hughd@google.com>,
        "'Andrew Morton'" <akpm@linux-foundation.org>,
        "'Linus Torvalds'" <torvalds@linux-foundation.org>,
        "'Johannes Weiner'" <hannes@cmpxchg.org>,
        "'Mel Gorman'" <mgorman@suse.de>,
        "'David Rientjes'" <rientjes@google.com>,
        "'Tetsuo Handa'" <penguin-kernel@i-love.sakura.ne.jp>,
        "'KAMEZAWA Hiroyuki'" <kamezawa.hiroyu@jp.fujitsu.com>,
        <linux-mm@kvack.org>, "'LKML'" <linux-kernel@vger.kernel.org>,
        "'Sergey Senozhatsky'" <sergey.senozhatsky@gmail.com>
References: <1450203586-10959-1-git-send-email-mhocko@kernel.org> <20160203132718.GI6757@dhcp22.suse.cz> <alpine.LSU.2.11.1602241832160.15564@eggly.anvils> <20160225064845.GA505@swordfish> <000001d16fad$63fff840$2bffe8c0$@alibaba-inc.com> <20160225092739.GE17573@dhcp22.suse.cz>
In-Reply-To: <20160225092739.GE17573@dhcp22.suse.cz>
Subject: Re: [PATCH 0/3] OOM detection rework v4
Date: Thu, 25 Feb 2016 17:48:26 +0800
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> >
> > Can you please schedule a run for the diff attached, in which
> > non-expensive allocators are allowed to burn more CPU cycles.
> 
> I do not think your patch will help. As you can see, both OOMs were for
> order-2 and there simply are no order-2+ free blocks usable for the
> allocation request so the watermark check will fail for all eligible
> zones and no_progress_loops is simply ignored. This is what I've tried
> to address by patch I have just posted as a reply to Hugh's email
> http://lkml.kernel.org/r/20160225092315.GD17573@dhcp22.suse.cz
> 
Hm, Mr. Swap can tell us more.

Hillf