From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 17 Jun 2005 14:13:31 -0700 From: Andrew Morton Subject: Re: 2.6.12-rc6-mm1 & 2K lun testing Message-Id: <20050617141331.078e5f8f.akpm@osdl.org> In-Reply-To: <42B2E7D2.9080705@us.ibm.com> References: <1118856977.4301.406.camel@dyn9047017072.beaverton.ibm.com> <20050616002451.01f7e9ed.akpm@osdl.org> <1118951458.4301.478.camel@dyn9047017072.beaverton.ibm.com> <20050616133730.1924fca3.akpm@osdl.org> <1118965381.4301.488.camel@dyn9047017072.beaverton.ibm.com> <20050616175130.22572451.akpm@osdl.org> <42B2E7D2.9080705@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Badari Pulavarty Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: Badari Pulavarty wrote: > > > It shouldn't be necessary to do both. Either the patch or the tuning > > should fix it. Please confirm. > > > > Also please determine whether the deep CFQ queue depth is a problem when > > the VFS tuning/patching is in place. > > > > IOW: let's work out which of these three areas needs to be addressed. > > > > Andrew, > > Sorry for not getting back earlier. I am running into weird problems. > When running "dd" write tests to 2048 ext3 filesystems, just with your > patch (no dirty ratio or CFS queue depth tuning), I see "buff" > increasing instead of "cache" and I see "bi" instead of "bo". > Whats going on here ? Beats me. Are you sure you're not running a broken vmstat? `buff' would increase if you were accidentally writing to /dev/sda1 rather than /dev/sda1/some-filename, but I don't know why vmstat would be getting confused over the direction of the I/O. > > procs -----------memory---------- ---swap-- -----io---- --system-- > ----cpu---- > r b swpd free buff cache si so bi bo in cs us > sy id wa > .. > 2 0 4 6339920 42712 24884 0 0 0 19 413 1237 46 > 6 48 0 You're wordwrapping... -- 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: aart@kvack.org