Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754018AbXF3Ven (ORCPT ); Sat, 30 Jun 2007 17:34:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752534AbXF3Vef (ORCPT ); Sat, 30 Jun 2007 17:34:35 -0400 Received: from mx34.mail.ru ([194.67.23.200]:31694 "EHLO mx27.mail.ru" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752500AbXF3Vee (ORCPT ); Sat, 30 Jun 2007 17:34:34 -0400 From: Andrey Borzenkov To: "Rafael J. Wysocki" Subject: Re: [possible regression] 2.6.22 reiserfs/libata sporadically hangs on resume from hibernation Date: Sun, 1 Jul 2007 01:34:30 +0400 User-Agent: KMail/1.9.7 Cc: michal.k.k.piotrowski@gmail.com, linux-kernel@vger.kernel.org, Pavel Machek , Andrew Morton References: <200706300859.47133.arvidjaar@mail.ru> <200706302237.50567.rjw@sisk.pl> In-Reply-To: <200706302237.50567.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1287358.RVfVHgsR6X"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200707010134.30843.arvidjaar@mail.ru> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5162 Lines: 160 --nextPart1287358.RVfVHgsR6X Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Sunday 01 July 2007, Rafael J. Wysocki wrote: > On Saturday, 30 June 2007 06:59, Andrey Borzenkov wrote: > > Since 2.6.18 I do not have suspend to RAM; now I am starting to lose > > suspend to disk :) > > > > Environment - vanilla kernel (2.6.22-rc6 currently + squashfs + single > > pata_ali patch to switch off DMA on CD-ROM), single root on reiserfs, > > libata with pata_ali driver. > > > > Until 2.6.22-rc I never had problems with hibernation. With 2.6.22-rc > > system hung at least once in every rcX. Up to rc6 those lockups were > > absolutely silent (black screen without reaction to any key). In rc6 I > > just got something different. After resume I got on screem: > > > > swsusp: Marking nosave pages: 000000000009f000-0000000000100000 > > swsusp: Basic memory bitmaps created > > swsusp: Basic memory bitmaps freed > > > > After that it just sits there doing nothing. Ther was brief sound of HDD > > but I suspect it was related more to power-on. System was responding to > > power-on button press: > > > > ACPI Error (event-0305): No installed handler for fixed event [00000002 > > 20070125] > > > > And SysRq was functioning. > > That probably means that there's a deadlock somewhere in there. > > > Unfortunately I do not have serial console so I > > copy manually stacks from several last screens of output; I have tried = to > > make a photo but right now my kbluetooth is refusing to work at all so I > > cannot transfer them :( (but I suspect quality would be too bad anyway) > > > > laptop_mode D > > io_schedule+0xe/0x20 > > Looks suspicious to me. Can you identify what line of code this points t= o? > If you could explain how to ... (I never understood what those two numbers= =20 mean :) ) Here is disassembled function 4168 .section .sched.text 4169 .p2align 4,,15 4170 .globl io_schedule 4171 .type io_schedule,@function 4172 io_schedule: 4173 0cd0 55 pushl %ebp 4174 0cd1 89E5 movl %esp,%ebp 4175 4176 0cd3 FF05140A incl per_cpu__runqueues+2388 4176 0000 4177 4178 0cd9 E8FCFFFF call schedule 4178 FF 4179 4180 0cde FF0D140A decl per_cpu__runqueues+2388 4180 0000 4181 4182 0ce4 5D popl %ebp 4183 0ce5 C3 ret 4184 .size io_schedule,.-io_schedule > > sync_buffer+0x35/0x40 > > __wait_on_bit+0x45/0x70 > > out_of_line_wait_on_bit+0x6c/0x80 > > __wait_on_buffer+0x27/0x30 > > search_by_key+0x15e/0x1250 [reiserfs] > > reiserfs_read_locked_inode+0x64/0x570 [reiserfs] > > reiserfs_iget+0x7e/0xa0 [reiserfs] > > reiserfs_lookup+0xc7/0x120 [reiserfs] > > do_lookup+0x138/0x180 > > __link_path_walk+0x787/0xce0 > > link_path_walk+0x44/0xc0 > > path_walk+0x18/0x20 > > do_path_lookup_0x88/0x210 > > __path_lookupintent_open+0x4d/0x90 > > path_lookup_open+0x1f/0x30 > > open_exec+0x28/0xb0 > > do_execve+0x36/0x1d0 > > sys_execve+0x2e/0x80 > > sysenter_past_esp+0x5f/0x99 > > > > 90clock D > > __mutex_lock_slow_path+0xa1/0x290 > > mutex_lock+0x21/0x30 > > do_lookup+0xa1/0x180 > > __link_path_walk+0x44/0xc0 > > path_walk+0x18/0x20 > > do_path_lookup+0x78/0x210 > > __user_walk_fd+0x38/0x50 > > vfs_stat_fd+0x21/0x50 > > vfs_stat+0x11/0x20 > > sys_stat64+0x14/0x30 > > sysenter_past_esp+0x5f/0x99 > > > > alsactl D > > io_schedule+0xe/0x20 > > Same here. Hmm. > > > sync_page+0x35/0x40 > > __wait_on_bit_lock+0x3f/0x70 > > __lock_page+0x68/0x70 > > filemap_nopage+0x16c/0x300 > > __handle_mm_faul+0x1d7/0x610 > > do_page_fault+0x1d7/0x610 > > error_code+0x6a/0x70 > > padzero+0x1f/0x30 > > load_elf_binary+0x743/0x1ab0 > > search_binary_handler+0x7b/0x1f0 > > do_execve+0x137/0x1d0 > > sys_execve+0x2e/0x80 > > sysenter_past_esp+0x5f/0x90 > > > > After that I could remount, sync and reboot using SysRq (well, after > > reboot it still insisted on replaying insane number of transactions so > > may be it did *not* remount / ro after all). Before reboot there was > > brief output that resembled lockdep warnings, but it went too fast to be > > readable. > > > > usual stuff follows > > I see you're using CFQ as the default IO scheduler. Can you please switch > to AS and see if that changes anything? > Sure, but given that I have no idea how to reproduce the lockup, we may nev= er=20 know whether it actually helped. --nextPart1287358.RVfVHgsR6X Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) iD8DBQBGhsxmR6LMutpd94wRAj9mAKCwUqJ4k3n39Z4KcctgMg3UZMrwLwCfbyPO yULJLET88zJ51jF3enaRm24= =IYbQ -----END PGP SIGNATURE----- --nextPart1287358.RVfVHgsR6X-- - 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/