From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 4 Aug 2007 09:07:37 +0200 From: Ingo Molnar Subject: Re: [PATCH 00/23] per device dirty throttling -v8 Message-ID: <20070804070737.GA940@elte.hu> References: <20070803123712.987126000@chello.nl> <20070804063217.GA25069@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070804063217.GA25069@elte.hu> Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds Cc: Peter Zijlstra , linux-mm@kvack.org, linux-kernel@vger.kernel.org, miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com, richard@rsk.demon.co.uk List-ID: * Ingo Molnar wrote: > There are positive reports in the never-ending "my system crawls like > an XT when copying large files" bugzilla entry: > > http://bugzilla.kernel.org/show_bug.cgi?id=7372 i forgot this entry: " We recently upgraded our office to gigabit Ethernet and got some big AMD64 / 3ware boxes for file and vmware servers... only to find them almost useless under any kind of real load. I've built some patched 2.6.21.6 kernels (using the bdi throttling patch you mentioned) to see if our various Debian Etch boxes run better. So far my testing shows a *great* improvement over the stock Debian 2.6.18 kernel on our configurations. " and bdi has been in -mm in the past i think, so we also know (to a certain degree) that it does not hurt those workloads that are fine either. [ my personal interest in this is the following regression: every time i start a large kernel build with DEBUG_INFO on a quad-core 4GB RAM box, i get up to 30 seconds complete pauses in Vim (and most other tasks), during plain editing of the source code. (which happens when Vim tries to write() to its swap/undo-file.) ] Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org