Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263117AbUCSQuR (ORCPT ); Fri, 19 Mar 2004 11:50:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263123AbUCSQuR (ORCPT ); Fri, 19 Mar 2004 11:50:17 -0500 Received: from fw.osdl.org ([65.172.181.6]:695 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S263117AbUCSQty (ORCPT ); Fri, 19 Mar 2004 11:49:54 -0500 Subject: 2.6.5-rc2-mm2 and direct_read_under From: Daniel McNeil To: Chris Mason Cc: Andrew Morton , Linux Kernel Mailing List , "linux-aio@kvack.org" In-Reply-To: <1079637004.6930.42.camel@ibm-c.pdx.osdl.net> References: <20040314172809.31bd72f7.akpm@osdl.org> <1079461971.23783.5.camel@ibm-c.pdx.osdl.net> <1079474312.4186.927.camel@watt.suse.com> <20040316152106.22053934.akpm@osdl.org> <20040316152843.667a623d.akpm@osdl.org> <20040316153900.1e845ba2.akpm@osdl.org> <1079485055.4181.1115.camel@watt.suse.com> <1079487710.3100.22.camel@ibm-c.pdx.osdl.net> <20040316180043.441e8150.akpm@osdl.org> <1079554288.4183.1938.camel@watt.suse.com> <20040317123324.46411197.akpm@osdl.org> <1079563568.4185.1947.camel@watt.suse.com> <20040317150909.7fd121bd.akpm@osdl.org> <1079566076.4186.1959.camel@watt.suse.com> <20040317155111.49d09a87.akpm@osdl.org> <1079568387.4186.1964.camel@watt.suse.com> <20040317161338.28b21c35.akpm@osdl.org> <1079569870.4186.1967.camel@watt.suse.com> <20040317163332.0385d665.akpm@osdl.org> <1079572511.6930.5.camel@ibm-c.pdx.osdl.net> <1079632431.6930.30.camel@ibm-c.pdx.osdl.net> <1079635678.4185.2100.camel@watt.suse.com> <1079637004.6930.42.camel@ibm-c.pdx.osdl.net> Content-Type: text/plain Organization: Message-Id: <1079714990.6930.49.camel@ibm-c.pdx.osdl.net> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-5) Date: 19 Mar 2004 08:49:50 -0800 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2437 Lines: 70 I re-ran direct_read_under test (6 copies) on 2.6.4-rc2-mm2: ext3 failed within 2 hours. ext2 ran overnight without errors. Daniel On Thu, 2004-03-18 at 11:10, Daniel McNeil wrote: > On Thu, 2004-03-18 at 10:47, Chris Mason wrote: > > On Thu, 2004-03-18 at 12:53, Daniel McNeil wrote: > > > I'm ran 2.6.4-mm2 plus the 2 wait_on_page_range() patches, > > > the test_set_page_writeback() patch and clear_page_dirty_for_io patch > > > overnight. > > > > > > 6 copies of direct_read_under test on 8-cpu system on 1 > > > ext3 file system in 1 directory on a scsi disk. > > > (http://developer.osdl.org/daniel/AIO/TESTS/direct_read_under.c) > > > > > > 5 of the 6 tests saw uninitialized data within 2 hours. > > > The sixth test ran overnight. > > > > Do you still have the errors generated? I wondering how big the range > > of uninitialized data was. When I was bug hunting yesterday, I saw > > ranges from 64k to 32mb in size, which was why I decided writes weren't > > getting to the disk at all. > > > > It might be interesting to try with data=writeback, or on ext2. Things > > might be easier to track if we're not worried about ll_rw_block. > > > > It might also be interesting to significantly lower the size of the > > reads and writes done by direct_read_under, or anything else you can > > think of to get the reproduce time down to something smaller than 2 > > hours... > > > > It's probably a good idea to upgrade to 2.6.5-rc1-mm2, just so we're all > > staring at the same code. > > > > -chris > > > > Chris, > > Still have the data: > 63 pages (258048 bytes) > 90 pages (368640 bytes) > 139 pages (569344 bytes) > 30 pages (122880 bytes) > 87 pages (356352 bytes) > > > I'm rebooting to 2.6.5-rc1-mm2 and will re-run. I have do have > versions of direct_read_under that do smaller i/o and also > 1 that does forks off and does 'sync' calls every few seconds. > > I'll give ext2 and try as well. > > Daniel > > -- > To unsubscribe, send a message with 'unsubscribe linux-aio' in > the body to majordomo@kvack.org. For more info on Linux AIO, > see: http://www.kvack.org/aio/ > Don't email: aart@kvack.org - 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/