Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757874AbXHBNjb (ORCPT ); Thu, 2 Aug 2007 09:39:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753064AbXHBNjX (ORCPT ); Thu, 2 Aug 2007 09:39:23 -0400 Received: from pat.uio.no ([129.240.10.15]:48521 "EHLO pat.uio.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751249AbXHBNjW (ORCPT ); Thu, 2 Aug 2007 09:39:22 -0400 Subject: Re: SD still better than CFS for 3d ?(was Re: 2.6.23-rc1) From: Trond Myklebust To: Ingo Molnar Cc: Lee Revell , Peter Zijlstra , Kasper Sandberg , Linus Torvalds , Linux Kernel Mailing List , ck@vds.kolivas.org In-Reply-To: <20070802114557.GC4067@elte.hu> References: <1185536610.502.8.camel@localhost> <20070729170641.GA26220@elte.hu> <1185839164.27166.7.camel@localhost> <1185863461.3092.4.camel@twins> <20070731085713.GA15136@elte.hu> <75b66ecd0708011935x600fc547j8edbe1ed3092d560@mail.gmail.com> <20070802114557.GC4067@elte.hu> Content-Type: text/plain Date: Thu, 02 Aug 2007 09:39:08 -0400 Message-Id: <1186061948.7702.9.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit X-UiO-Resend: resent X-UiO-Spam-info: not spam, SpamAssassin (score=-0.1, required=12.0, autolearn=disabled, AWL=-0.073) X-UiO-Scanned: 7AF809BA8FAD72FD794576F86E6C378187BD072A X-UiO-SPAM-Test: remote_host: 129.240.10.9 spam_score: 0 maxlevel 200 minaction 2 bait 0 mail/h: 606 total 3064672 max/h 8345 blacklist 0 greylist 0 ratelimit 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1061 Lines: 28 On Thu, 2007-08-02 at 13:45 +0200, Ingo Molnar wrote: > * Lee Revell wrote: > > > On 7/31/07, Ingo Molnar wrote: > > > Almost all of the Reiser3 > > > code runs under the BKL, and the only other major kernel infrastructure > > > that has BKL dependencies is the TTY code. > > > > Also NFS: > > > > $ grep -rIi lock_kernel kernel-source/linux-2.6.17/fs/nfs/ | wc -l > > 94 > > yeah - but i never saw NFS cause really big BKL latencies. IIRC it uses > the BKL mostly for archaic reasons, most of the NFS code is SMP-safe. > Almost all of the reiser3 code runs under the BKL on the other hand. We're still working on fixing the NFS case, but as everyone knows, finding those last few obscure code sections which still depend on BKL protection can be tedious work... Trond - 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/