From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id BA4F86B0078 for ; Wed, 27 Jan 2010 18:46:22 -0500 (EST) Received: from wpaz29.hot.corp.google.com (wpaz29.hot.corp.google.com [172.24.198.93]) by smtp-out.google.com with ESMTP id o0RNkJUh020156 for ; Wed, 27 Jan 2010 23:46:19 GMT Received: from pxi36 (pxi36.prod.google.com [10.243.27.36]) by wpaz29.hot.corp.google.com with ESMTP id o0RNk2s8004267 for ; Wed, 27 Jan 2010 15:46:17 -0800 Received: by pxi36 with SMTP id 36so77468pxi.26 for ; Wed, 27 Jan 2010 15:46:17 -0800 (PST) Date: Wed, 27 Jan 2010 15:46:15 -0800 (PST) From: David Rientjes Subject: Re: [PATCH v3] oom-kill: add lowmem usage aware oom kill handling In-Reply-To: <20100127085355.f5306e78.kamezawa.hiroyu@jp.fujitsu.com> Message-ID: References: <20100121145905.84a362bb.kamezawa.hiroyu@jp.fujitsu.com> <20100122152332.750f50d9.kamezawa.hiroyu@jp.fujitsu.com> <20100125151503.49060e74.kamezawa.hiroyu@jp.fujitsu.com> <20100126151202.75bd9347.akpm@linux-foundation.org> <20100127085355.f5306e78.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: KAMEZAWA Hiroyuki Cc: Andrew Morton , Balbir Singh , minchan.kim@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Wed, 27 Jan 2010, KAMEZAWA Hiroyuki wrote: > Yes, I think you're right. But "breaking current behaviro of our servers!" > arguments kills all proposal to this area and this oom-killer or vmscan is > a feature should be tested by real users. Nobody has said we should discount lowmem rss when dealing with a GFP_DMA allocation, it simply wasn't possible until the lowmem rss counters were introduced in -mm. It would prevent the needless killing of innocent tasks which would not allow the page allocation to succeed, so it's a good feature to have. It doesn't need to be configurable at all, we just need to find a way to introduce it into the heuristic without mangling oom_adj. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org