Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756930AbZIRLvM (ORCPT ); Fri, 18 Sep 2009 07:51:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756807AbZIRLvL (ORCPT ); Fri, 18 Sep 2009 07:51:11 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:49033 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756615AbZIRLvK (ORCPT ); Fri, 18 Sep 2009 07:51:10 -0400 Date: Fri, 18 Sep 2009 13:50:53 +0200 From: Ingo Molnar To: Roland Dreier Cc: Peter Zijlstra , linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Mackerras , Anton Blanchard , general@lists.openfabrics.org, akpm@linux-foundation.org, torvalds@linux-foundation.org Subject: Re: [ofa-general] Re: [GIT PULL] please pull ummunotify Message-ID: <20090918115053.GK9930@elte.hu> References: <1253187028.8439.2.camel@twins> <1253198976.14935.27.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 892 Lines: 23 * Roland Dreier wrote: > > But yeah, I currently don't see a very nice match to perf counters. > > OK. It would be nice to tie into something more general, but I think > I agree -- perf counters are missing the filtering and the "no lost > events" that ummunotify does have. And I'm not sure it's worth > messing up the perf counters design just to jam one more not totally > related thing in. The filtering can be done and has been done - see Li Zefan's patchset that uses filter expressions to do per event in-kernel filtering. The OOM DoS is a bug in your patches i think, which perfcounters solves ;-) Ingo -- 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/