linux-kernel - Re: [PATCH 0/3] OOM detection rework v4

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Message-ID: <20160304173916.GA24204@dhcp22.suse.cz>
Date:	Fri, 4 Mar 2016 18:39:16 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Mel Gorman <mgorman@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	Hillf Danton <hillf.zj@...baba-inc.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [PATCH 0/3] OOM detection rework v4

On Fri 04-03-16 16:15:58, Michal Hocko wrote:
> On Fri 04-03-16 14:23:27, Joonsoo Kim wrote:
[...]
> > Unconditional 16 looping and then OOM kill really doesn't make any
> > sense, because it doesn't mean that we already do our best.
> 
> 16 is not really that important. We can change that if that doesn't
> sounds sufficient. But please note that each reclaim round means
> that we have scanned all eligible LRUs to find and reclaim something

this should read "scanned potentially all eligible LRUs..."

> and asked direct compaction to prepare a high order page.
> This sounds like "do our best" to me.


-- 
Michal Hocko
SUSE Labs