From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Zhang, Yanmin" Subject: Re: [Bug #13726] fio sync read 4k block size 35% regression Date: Tue, 07 Jul 2009 14:06:42 +0800 Message-ID: <1246946802.2560.532.camel@ymzhang> References: <35kKlbXMqWN.A.RXD.D0oUKB@chimera> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="iso-8859-1" To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , Kernel Testers List , Wu Fengguang On Tue, 2009-07-07 at 02:01 +0200, Rafael J. Wysocki wrote: > This message has been generated automatically as a part of a report > of recent regressions. >=20 > The following bug entry is on the current list of known regressions > from 2.6.30. Please verify if it still should be listed and let me k= now > (either way). >=20 >=20 > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=3D13726 > Subject : fio sync read 4k block size 35% regression > Submitter : Zhang, Yanmin > Date : 2009-07-01 11:25 (6 days old) > First-Bad-Commit: http://git.kernel.org/?p=3Dlinux/kernel/git/torvald= s/linux-2.6.git;a=3Dcommit;h=3D51daa88ebd8e0d437289f589af29d4b39379ea76 > References : http://lkml.org/lkml/2009/6/30/679 > Handled-By : Wu Fengguang =46engguang, I'm still working on it now. The new testing against 2.6.31-rc2 is ongo= ing. fio sync/mmap read has new behavior. I did collect some data. But sudde= nly with new created data, the fio_sync_read_4k regression disappeared, whi= le fio_mmap_read is still there. Originally, the testing and bisect were s= table. Let me check what happens firstly. Just update. =EF=BB=BF How did you test your new readahead patches before sending to LKML? Yanmin