From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261947AbVGZUiG (ORCPT ); Tue, 26 Jul 2005 16:38:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261888AbVGZUhe (ORCPT ); Tue, 26 Jul 2005 16:37:34 -0400 Received: from e32.co.us.ibm.com ([32.97.110.130]:52451 "EHLO e32.co.us.ibm.com") by vger.kernel.org with ESMTP id S261912AbVGZUhR (ORCPT ); Tue, 26 Jul 2005 16:37:17 -0400 Subject: Re: Memory pressure handling with iSCSI From: Badari Pulavarty To: Andrew Morton Cc: lkml , linux-mm In-Reply-To: <20050726121250.0ba7d744.akpm@osdl.org> References: <1122399331.6433.29.camel@dyn9047017102.beaverton.ibm.com> <20050726111110.6b9db241.akpm@osdl.org> <1122403152.6433.39.camel@dyn9047017102.beaverton.ibm.com> <20050726114824.136d3dad.akpm@osdl.org> <20050726121250.0ba7d744.akpm@osdl.org> Content-Type: text/plain Date: Tue, 26 Jul 2005 13:36:56 -0700 Message-Id: <1122410216.6433.41.camel@dyn9047017102.beaverton.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 (2.0.4-4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2005-07-26 at 12:12 -0700, Andrew Morton wrote: > Andrew Morton wrote: > > > > Can you please reduce the number of filesystems, see if that reduces the > > dirty levels? > > Also, it's conceivable that ext3 is implicated here, so it might be saner > to perform initial investigation on ext2. > > (when kjournald writes back a page via its buffers, the page remains > "dirty" as far as the VFS is concerned. Later, someone tries to do a > writepage() on it and we'll discover the buffers' cleanness and the page > will be cleaned without any I/O being performed. All the throttling > _should_ work OK in this case. But ext2 is more straightforward.) I will try ext2 next. - Badari