From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [ofa-general] Re: [GIT PULL] please pull ummunotify Date: Fri, 18 Sep 2009 13:50:53 +0200 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 Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Roland Dreier Cc: Peter Zijlstra , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Paul Mackerras , Anton Blanchard , general-ZwoEplunGu1OwGhvXhtEPSCwEArCW2h5@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org List-Id: linux-rdma@vger.kernel.org * 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-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html