Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755930Ab1DDXLF (ORCPT ); Mon, 4 Apr 2011 19:11:05 -0400 Received: from smtp-out.google.com ([74.125.121.67]:34439 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754250Ab1DDXLB convert rfc822-to-8bit (ORCPT ); Mon, 4 Apr 2011 19:11:01 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=google.com; s=beta; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; b=ZTBEnGZGVWJyGYWWAhM5bcsuIcWFnUegZ+/KpDRFT2bDxBu/VwKs4pY+wTGFAiH1jA Et0/L64C7b959HXyIuqA== MIME-Version: 1.0 In-Reply-To: <4D9433DC.5020008@cn.fujitsu.com> References: <20110323030326.789836913@google.com> <4D9433DC.5020008@cn.fujitsu.com> From: Paul Turner Date: Mon, 4 Apr 2011 16:10:11 -0700 Message-ID: Subject: Re: [patch 00/15] CFS Bandwidth Control V5 To: Xiao Guangrong Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Bharata B Rao , Dhaval Giani , Balbir Singh , Vaidyanathan Srinivasan , Srivatsa Vaddagiri , Kamalesh Babulal , Ingo Molnar , Pavel Emelyanov Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1488 Lines: 36 On Thu, Mar 31, 2011 at 12:57 AM, Xiao Guangrong wrote: > On 03/23/2011 11:03 AM, Paul Turner wrote: >> Hi all, >> >> Please find attached the latest version of bandwidth control for the normal >> scheduling class. ?This revision has undergone fairly extensive changes since >> the previous version based largely on the observation that many of the edge >> conditions requiring special casing around update_curr() were a result of >> introducing side-effects into that operation. ?By introducing an interstitial >> state, where we recognize that the runqueue is over bandwidth, but not marking >> it throttled until we can actually remove it from the CPU we avoid the >> previous possible interactions with throttled entities which eliminates some >> head-scratching corner cases. >> > > Hi Paul, > > I have wrote some codes to test this patchset. While run attached test case, > the test program is blocked, it seams the children tasks can not be killed, > after one or two hours, the watchdog is expired and triggers box crashed. > Sorry, I was out last week. I'm taking a look at this now, I believe the interaction lies somewhere within the quota return paths. Thanks for taking the time to test! - Paul -- 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/