Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933397Ab1CXAHL (ORCPT ); Wed, 23 Mar 2011 20:07:11 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:36411 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932887Ab1CXAHJ convert rfc822-to-8bit (ORCPT ); Wed, 23 Mar 2011 20:07:09 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: "Luis Claudio R. Goncalves" Subject: Re: [PATCH 2/5] Revert "oom: give the dying task a higher priority" Cc: kosaki.motohiro@jp.fujitsu.com, KAMEZAWA Hiroyuki , linux-kernel@vger.kernel.org, Andrew Morton , David Rientjes , Linus Torvalds , Rik van Riel , Oleg Nesterov , linux-mm , Andrey Vagin , Hugh Dickins In-Reply-To: <20110323134037.GP5212@uudg.org> References: <20110323164229.6b647004.kamezawa.hiroyu@jp.fujitsu.com> <20110323134037.GP5212@uudg.org> Message-Id: <20110324090635.1AEC.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8BIT X-Mailer: Becky! ver. 2.56.05 [ja] Date: Thu, 24 Mar 2011 09:06:44 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1581 Lines: 39 > On Wed, Mar 23, 2011 at 04:42:29PM +0900, KAMEZAWA Hiroyuki wrote: > | On Tue, 22 Mar 2011 20:06:48 +0900 (JST) > | KOSAKI Motohiro wrote: > | > | > This reverts commit 93b43fa55088fe977503a156d1097cc2055449a2. > | > > | > The commit dramatically improve oom killer logic when fork-bomb > | > occur. But, I've found it has nasty corner case. Now cpu cgroup > | > has strange default RT runtime. It's 0! That said, if a process > | > under cpu cgroup promote RT scheduling class, the process never > | > run at all. > | > > | > Eventually, kernel may hang up when oom kill occur. > | > > | > The author need to resubmit it as adding knob and disabled > | > by default if he really need this feature. > | > > | > Cc: Luis Claudio R. Goncalves > | > Signed-off-by: KOSAKI Motohiro > | > | Acked-by: KAMEZAWA Hiroyuki > > The original patch was written to fix an issue observed in 2.6.24.7-rt. > As the logic sounded useful, I ported it to upstream. Anyway,I am trying > a few ideas to rework that patch. In the meantime, I'm pretty fine with > reverting the commit. > > Acked-by: Luis Claudio R. Gon?alves Ok, and then, I'll drop [patch 3/5] too. I hope to focus to discuss your idea. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/