Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754789Ab3DKUAR (ORCPT ); Thu, 11 Apr 2013 16:00:17 -0400 Received: from mail-qe0-f51.google.com ([209.85.128.51]:37113 "EHLO mail-qe0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753538Ab3DKUAL (ORCPT ); Thu, 11 Apr 2013 16:00:11 -0400 Date: Thu, 11 Apr 2013 13:00:05 -0700 From: Tejun Heo To: Mikulas Patocka Cc: Vivek Goyal , Jens Axboe , Mike Snitzer , Milan Broz , dm-devel@redhat.com, Andi Kleen , dm-crypt@saout.de, linux-kernel@vger.kernel.org, Christoph Hellwig , Christian Schmidt , "Alasdair G. Kergon" Subject: Re: [PATCH v2] make dm and dm-crypt forward cgroup context (was: dm-crypt parallelization patches) Message-ID: <20130411200005.GB11956@mtj.dyndns.org> References: <20130409195259.GL6186@mtj.dyndns.org> <20130409210735.GR6320@redhat.com> <20130410192427.GA14911@redhat.com> <20130410235009.GI17641@mtj.dyndns.org> <20130411195203.GA11956@mtj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130411195203.GA11956@mtj.dyndns.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 736 Lines: 17 On Thu, Apr 11, 2013 at 12:52:03PM -0700, Tejun Heo wrote: > If this becomes an actual bottleneck, the right thing to do is making > css ref per-cpu. Please stop messing around with refcounting. If you think this kind of hackery is acceptable, you really need to re-evaluate your priorities in making engineering decisions. In tightly coupled code, maybe, but you're trying to introduce utterly broken error-prone thing as a generic block layer API. I mean, are you for real? -- tejun -- 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/