From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx131.postini.com [74.125.245.131]) by kanga.kvack.org (Postfix) with SMTP id E19B36B0036 for ; Tue, 16 Apr 2013 03:57:08 -0400 (EDT) Received: by mail-da0-f53.google.com with SMTP id n34so130281dal.40 for ; Tue, 16 Apr 2013 00:57:08 -0700 (PDT) Message-ID: <516D044B.3040300@gmail.com> Date: Tue, 16 Apr 2013 15:56:59 +0800 From: Simon Jeons MIME-Version: 1.0 Subject: Re: [BUG][s390x] mm: system crashed References: <156480624.266924.1365995933797.JavaMail.root@redhat.com> <2068164110.268217.1365996520440.JavaMail.root@redhat.com> <20130415055627.GB4207@osiris> <516B9B57.6050308@redhat.com> <20130416075047.GA4184@osiris> In-Reply-To: <20130416075047.GA4184@osiris> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Heiko Carstens Cc: Zhouping Liu , linux-mm@kvack.org, LKML , caiqian , Caspar Zhang , Martin Schwidefsky Hi Heiko, On 04/16/2013 03:50 PM, Heiko Carstens wrote: > On Mon, Apr 15, 2013 at 02:16:55PM +0800, Zhouping Liu wrote: >> On 04/15/2013 01:56 PM, Heiko Carstens wrote: >>> On Sun, Apr 14, 2013 at 11:28:40PM -0400, Zhouping Liu wrote: >>>> i? 1/2 16109.346170A? Call Trace: >>>> i? 1/2 16109.346179A? (i? 1/2 <0000000000100920>A? show_trace+0x128/0x12c) >>>> i? 1/2 16109.346195A? i? 1/2 <00000000001cd320>A? rcu_check_callbacks+0x458/0xccc >>>> i? 1/2 16109.346209A? i? 1/2 <0000000000140f2e>A? update_process_times+0x4a/0x74 >>>> i? 1/2 16109.346222A? i? 1/2 <0000000000199452>A? tick_sched_handle.isra.12+0x5e/0x70 >>>> i? 1/2 16109.346235A? i? 1/2 <00000000001995aa>A? tick_sched_timer+0x6a/0x98 >>>> i? 1/2 16109.346247A? i? 1/2 <000000000015c1ea>A? __run_hrtimer+0x8e/0x200 >>>> i? 1/2 16109.346381A? i? 1/2 <000000000015d1b2>A? hrtimer_interrupt+0x212/0x2b0 >>>> i? 1/2 16109.346385A? i? 1/2 <00000000001040f6>A? clock_comparator_work+0x4a/0x54 >>>> i? 1/2 16109.346390A? i? 1/2 <000000000010d658>A? do_extint+0x158/0x15c >>>> i? 1/2 16109.346396A? i? 1/2 <000000000062aa24>A? ext_skip+0x38/0x3c >>>> i? 1/2 16109.346404A? i? 1/2 <00000000001153c8>A? smp_yield_cpu+0x44/0x48 >>>> i? 1/2 16109.346412A? (i? 1/2 <000003d10051aec0>A? 0x3d10051aec0) >>>> i? 1/2 16109.346457A? i? 1/2 <000000000024206a>A? __page_check_address+0x16a/0x170 >>>> i? 1/2 16109.346466A? i? 1/2 <00000000002423a2>A? page_referenced_one+0x3e/0xa0 >>>> i? 1/2 16109.346501A? i? 1/2 <000000000024427c>A? page_referenced+0x32c/0x41c >>>> i? 1/2 16109.346510A? i? 1/2 <000000000021b1dc>A? shrink_page_list+0x380/0xb9c >>>> i? 1/2 16109.346521A? i? 1/2 <000000000021c0a6>A? shrink_inactive_list+0x1c6/0x56c >>>> i? 1/2 16109.346532A? i? 1/2 <000000000021c69e>A? shrink_lruvec+0x252/0x56c >>>> i? 1/2 16109.346542A? i? 1/2 <000000000021ca44>A? shrink_zone+0x8c/0x1bc >>>> i? 1/2 16109.346553A? i? 1/2 <000000000021d080>A? balance_pgdat+0x50c/0x658 >>>> i? 1/2 16109.346564A? i? 1/2 <000000000021d318>A? kswapd+0x14c/0x470 >>>> i? 1/2 16109.346576A? i? 1/2 <0000000000158292>A? kthread+0xda/0xe4 >>>> i? 1/2 16109.346656A? i? 1/2 <000000000062a5de>A? kernel_thread_starter+0x6/0xc >>>> i? 1/2 16109.346682A? i? 1/2 <000000000062a5d8>A? kernel_thread_starter+0x0/0xc >>>> [-- MARK -- Fri Apr 12 06:15:00 2013] >>>> i? 1/2 16289.386061A? INFO: rcu_sched self-detected stall on CPU { 0} (t=42010 jiffies >>>> g=89766 c=89765 q=10627) >>> Did the system really crash or did you just see the rcu related warning(s)? >> I just check it again, actually at first the system didn't really >> crash, but the system is very slow in response. >> and the reproducer process can't be killed, after I did some common >> actions such as 'ls' 'vim' etc, the system >> seemed to be really crashed, no any response. >> >> also in the previous testing, I can remember that the system would >> be no any response for a long time, just only >> repeatedly print out the such above 'Call Trace' into console. > Ok, thanks. > Just a couple of more questions: did you see this also on other archs, or just > s390 (if you tried other platforms at all). > > If you have some time, could you please repeat your test with the kernel > command line option " user_mode=home "? What's the meaning of this command line? I can't find it in Documentation/kernel-parameters.txt/ > > As far as I can tell there was only one s390 patch merged that was > mmap related: 486c0a0bc80d370471b21662bf03f04fbb37cdc6 "s390/mm: Fix crst > upgrade of mmap with MAP_FIXED". > Even though I don't think it explains the bug you've seen it might be worth > to try to revert it. > > And at last, can you share your kernel config? > > Thanks, > Heiko > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: email@kvack.org -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org