From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Riffard Subject: Re: 2.6.24-rc3-mm1: I/O error, system hangs Date: Fri, 23 Nov 2007 18:52:28 +0100 Message-ID: <4747135C.60205@free.fr> References: <20071120204525.ff27ac98.akpm@linux-foundation.org> <4744A6F2.4030302@free.fr> <20071121144116.c932727b.akpm@linux-foundation.org> <4746814F.80502@free.fr> <4746866B.5070207@suse.de> <4746BB9D.2030508@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from smtp8-g19.free.fr ([212.27.42.65]:41981 "EHLO smtp8-g19.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752890AbXKWRwb (ORCPT ); Fri, 23 Nov 2007 12:52:31 -0500 In-Reply-To: <4746BB9D.2030508@suse.de> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Hannes Reinecke Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, James Bottomley , linux-scsi@vger.kernel.org Le 23.11.2007 12:38, Hannes Reinecke a =E9crit : > Hannes Reinecke wrote: >> Laurent Riffard wrote: >>> Le 21.11.2007 23:41, Andrew Morton a =E9crit : >>>> On Wed, 21 Nov 2007 22:45:22 +0100 >>>> Laurent Riffard wrote: >>>> >>>>> Le 21.11.2007 05:45, Andrew Morton a =E9crit : >>>>>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.= 6.24-rc3/2.6.24-rc3-mm1/ >>>>> Hello,=20 >>>>> >>>>> My system hangs shortly after I logged in Gnome desktop. SysRq-W = shows >>>>> that a bunch of task are blocked in "D" state, they seem to wait = for >>>>> some I/O completion. I can try to hand-copy some data if requeste= d. >>>>> >>>>> I found these messages in dmesg: >>>>> >>>>> ~$ grep -C2 end_request dmesg-2.6.24-rc3-mm1=20 >>>>> EXT3-fs: mounted filesystem with ordered data mode. >>>>> sd 0:0:0:0: [sda] Result: hostbyte=3DDID_NO_CONNECT driverbyte=3D= DRIVER_OK,SUGGEST_OK >>>>> end_request: I/O error, dev sda, sector 16460 >>>>> ReiserFS: sda7: found reiserfs format "3.6" with standard journal >>>>> ReiserFS: sda7: using ordered data mode >>>>> -- >>>>> ReiserFS: sda7: Using r5 hash to sort names >>>>> sd 0:0:1:0: [sdb] Result: hostbyte=3DDID_NO_CONNECT driverbyte=3D= DRIVER_OK,SUGGEST_OK >>>>> end_request: I/O error, dev sdb, sector 19632 >>>>> sd 0:0:1:0: [sdb] Result: hostbyte=3DDID_NO_CONNECT driverbyte=3D= DRIVER_OK,SUGGEST_OK >>>>> end_request: I/O error, dev sdb, sector 40037363 >>>>> Adding 1048568k swap on /dev/mapper/vglinux1-lvswap. Priority:-1= extents:1 across:1048568k >>>>> lp0: using parport0 (interrupt-driven). >>>>> >>>>> These errors occur *only* with 2.6.24-rc3-mm1, they are 100% repr= oducible. >>>>> 2.6.24-rc3 and 2.6.24-rc2-mm1 are fine. >>>>> >>>>> Maybe something is broken in pata_via driver ? >>>>> >>>> Could be - libata-reimplement-ata_acpi_cbl_80wire-using-ata_acpi_g= tm_xfermask.patch >>>> and pata_amd-pata_via-de-couple-programming-of-pio-mwdma-and-udma-= timings.patch >>>> touch pata_via.c. >>> None of the above... >>> >>> I did a bisection, it spotted git-scsi-misc.patch.=20 >>> I just run 2.6.24-rc3-mm1 + revert-git-scsi-misc.patch, and it work= s fine. >>> >>> I guess commit 8655a546c83fc43f0a73416bbd126d02de7ad6c0 "[SCSI] Do = not=20 >>> requeue requests if REQ_FAILFAST is set" is the real culprit. The o= ther=20 >>> commits are touching documentation or drivers I don't use. I'll try= =20 >>> to revert only this one this evening. I can confirm : reverting commit 8655a546c83fc43f0a73416bbd126d02de7ad6= c0=20 does fix the problem. >> Hmm. Weird. I'll have a look into it. Apparently I'll be returning a= n error where >> I shouldn't. Checking ... >> > Ok, found it. We are blocking even special commands (ie requests with= PREEMPT not set) > when FAILFAST is set. Which is clearly wrong. The attached patch fixe= s this. Sorry, it's not enough. 2.6.24-rc3-mm1 + your patch still hangs with I/= O errors. --=20 laurent