From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933064AbWFWMMP (ORCPT ); Fri, 23 Jun 2006 08:12:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933080AbWFWMMP (ORCPT ); Fri, 23 Jun 2006 08:12:15 -0400 Received: from ug-out-1314.google.com ([66.249.92.169]:20683 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S933064AbWFWMMO (ORCPT ); Fri, 23 Jun 2006 08:12:14 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:date:from:to:cc:subject:message-id:references:mime-version:content-type:content-disposition:in-reply-to:user-agent:sender; b=lTWnrozfRQ10H3rqAwoNtp8lC0aY4Rtbv+RwEbnkkEtXXdMZREDoJrPQRpCEngS3gEGB8txNJK6gbCboPlIgajuyhCEnViIqLPTk3zq9AE4zPrAmjql6tBkd2ZaLcDT3JeXT1xXP+ecXvRsRr5j2RzfURhrWFFtMnrdwhYlVdWA= Date: Fri, 23 Jun 2006 14:12:11 +0200 From: Frederik Deweerdt To: Pavel Machek Cc: Andrew Morton , greg@kroah.com, linux-kernel@vger.kernel.org, linux-pm@osdl.org, stern@rowland.harvard.edu Subject: Re: [linux-pm] swsusp regression [Was: 2.6.17-mm1] Message-ID: <20060623121210.GB2234@slug> References: <20060621034857.35cfe36f.akpm@osdl.org> <4499BE99.6010508@gmail.com> <20060621221445.GB3798@inferi.kami.home> <20060622061905.GD15834@kroah.com> <20060622004648.f1912e34.akpm@osdl.org> <20060622160403.GB2539@slug> <20060622092506.da2a8bf4.akpm@osdl.org> <20060623090206.GA2234@slug> <20060623091016.GE4940@elf.ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060623091016.GE4940@elf.ucw.cz> User-Agent: mutt-ng/devel-r804 (Linux) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 23, 2006 at 11:10:21AM +0200, Pavel Machek wrote: > Hi! > > > > Frederik Deweerdt wrote: > > > > > > > Thu, Jun 22, 2006 at 12:46:48AM -0700, Andrew Morton wrote: > > > > > I can bisect it if we're stuck, but that'll require beer or something. > > > > > > > > FWIW, my laptop (Dell D610) gave the following results: > > > > 2.6.17-mm1: suspend_device(): usb_generic_suspend+0x0/0x135 [usbcore]() returns -16 > > > > 2.6.17+origin.patch: suspend_device(): usb_generic_suspend+0x0/0x135 [usbcore]() returns -16 > > > > > > So it's in mainline already - hence it's some recently-written thing which > > > was not tested in rc6-mm2. > > > > > > > 2.6.17: oops > > > > 2.6.17.1: oops > > > > > > 2.6.17 wasn't supposed to oops. Do you have details on this? > > > > > For some reason, unknown to me, the oops won't display on the serial > > link :(. > > Serial console is currently broken by suspend, resume. _But_ I have a > patch I'd like you to try.... pretty please? > Sure :)... I applied it but the output went to the laptop's screen anyway... > That is not an oops, rather a kernel BUG(). Can you just remove > might_sleep line and see what happens? > > Unfortunately, backtrace does not tell me which notifier chain did > that :-(. Are you using audit or something like that? > > /* > * lock for reading > */ > static inline void down_read(struct rw_semaphore *sem) > { > might_sleep(); > ~~~~~~~~~~~~~~~~~~~~~~ > rwsemtrace(sem,"Entering down_read"); > __down_read(sem); > rwsemtrace(sem,"Leaving down_read"); > } > Here's the (hand copied) dump when the might_sleep is removed: esi: 00000003 edit: 00000000 ebp: f6cb9eb8 esp: f6cb9ea4 ds: 007b es: 007b ss: 0068 Process bash (pid: 9402, threadinfo=f6cb8000 task=f7a5c570) Stack: c0229b71 00000046 00000000 00000286 c0383ca7 f6cb9ecc c013b242 00000003 00000000 00000003 f6cb9ee0 c013b2e8 00000003 c0436890 f6c9a003 f6cb9f08 c013b481 00000003 00000003 00000246 c1788b00 00000003 c04368a0 c043692c Call Trace: show_stack_log_lvl+0x92/0xb7 show_registers+0x1a3/0x21b die+0x117/0x230 do_page_fault+0x39c/0x72a error_code+0x4f/0x54 suspend_enter+0x2f/0x52 enter_state+0x4b/0x8d state_store+0xa0/0xa2 subsys_attr_store+0x37/0x41 flush_write_buffer+0x3c/0x46 sysfs_write_file+0x67/0x8b vfs_write+0x1b9/0x1be sys_write+0x4b/0x75 sysenter_past_esp+0x54/0x75 Code: 05 c4 42 43 c0 31 43 43 c0 c3 8b 2d 68 6e 54 c0 8b 1d 60 6e 54 c0 8b 35 6c 6e 54 c0 8b 3d 70 6d 54 c0 ff 35 74 6e 54 c0 9d c3 90 6d 38 ea ff e8 a2 ff ff ff 6a 03 e8 ec b6 de ff 83 c4 04 c3 EIP: [c043431c>] do_suspend_lowlevel+0x0/0x15 SS:ESP 0068:f6cb6ea4 Regards, Frederik