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Message-ID: <46433309.7010507@goop.org>
Date: Thu, 10 May 2007 07:58:17 -0700
From: Jeremy Fitzhardinge <jeremy@...p.org>
To: Michal Piotrowski <michal.k.k.piotrowski@...il.com>
CC: Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, Andi Kleen <ak@...e.de>,
Ingo Molnar <mingo@...e.hu>
Subject: Re: [BUG] Re: mm snapshot broken-out-2007-05-10-03-06.tar.gz uploaded
Michal Piotrowski wrote:
> Hi Jeremy,
>
> akpm@...ux-foundation.org napisał(a):
>
>> The mm snapshot broken-out-2007-05-10-03-06.tar.gz has been uploaded to
>>
>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/mm/broken-out-2007-05-10-03-06.tar.gz
>>
>>
>
> Bug reported here http://lkml.org/lkml/2007/4/25/400 is back.
>
Yes, we never worked out what was going wrong. It seems to be a strange
interaction between lock API testing and Andi's sched_clock() changes,
which is triggered by my softlockup changes. But given that lock API
testing has no explicit interaction with either sched_clock() or the
softlockup watchdog, its completely mysterious that it should be
affected in this way.
We ended up with an appeal to Ingo, but he's ignored it so far.
J
> [ 0.000000] ------------------------
> [ 0.000000] | Locking API testsuite:
> [ 0.000000] ----------------------------------------------------------------------------
> [ 0.000000] | spin |wlock |rlock |mutex | wsem | rsem |
> [ 0.000000] --------------------------------------------------------------------------
> [ 0.000000] A-A deadlock: ok | ok | ok | ok | ok | ok |
> [ 0.000000] A-B-B-A deadlock: ok | ok | ok | ok | ok | ok |
> [ 0.000001] A-B-B-C-C-A deadlock: ok | ok | ok | ok | ok | ok |
> [ 0.000001] A-B-C-A-B-C deadlock: ok | ok | ok | ok | ok | ok |
> [ 0.000002] A-B-B-C-C-D-D-A deadlock: ok | ok | ok | ok | ok | ok |
> [ 0.000003] A-B-C-D-B-D-D-A deadlock: ok | ok | ok | ok | ok | ok |
> [ 0.000004] A-B-C-D-B-C-D-A deadlock: ok | ok | ok | ok | ok | ok |
> [ 0.000006] double unlock: ok | ok | ok | ok | ok | ok |
> [ 0.000006] initialize held: ok | ok | ok | ok | ok | ok |
> [ 0.000006] bad unlock order: ok | ok | ok | ok | ok | ok |
> [ 0.000007] --------------------------------------------------------------------------
> [ 0.000007] recursive read-lock: | ok | | ok |
> [ 0.000007] recursive read-lock #2: | ok | | ok |
> [ 0.000007] mixed read-write-lock: | ok | | ok |
> [ 0.000007] mixed write-read-lock: | ok | | ok |
> [ 0.000007] --------------------------------------------------------------------------
> [ 0.000007] hard-irqs-on + irq-safe-A/12: ok | ok | ok |
> [ 0.000007] soft-irqs-on + irq-safe-A/12: ok | ok | ok |
> [ 0.000007] hard-irqs-on + irq-safe-A/21: ok | ok | ok |
> [ 0.000007] soft-irqs-on + irq-safe-A/21: ok | ok | ok |
> [ 0.000007] sirq-safe-A => hirqs-on/12: ok | ok |irq event stamp: 472
> [ 0.000008] hardirqs last enabled at (472): [<c020e4d6>] irqsafe2A_rlock_12+0xb6/0xc7
> [ 0.000008] hardirqs last disabled at (471): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (468): [<c020e4c1>] irqsafe2A_rlock_12+0xa1/0xc7
> [ 0.000008] softirqs last disabled at (464): [<c020e42c>] irqsafe2A_rlock_12+0xc/0xc7
> [ 0.000008] FAILED| [<c0105276>] dump_trace+0x63/0x1eb
> [ 0.000008] [<c0105418>] show_trace_log_lvl+0x1a/0x30
> [ 0.000008] [<c010605a>] show_trace+0x12/0x14
> [ 0.000008] [<c01060f7>] dump_stack+0x16/0x18
> [ 0.000008] [<c020c0eb>] dotest+0x8d/0x3f4
> [ 0.000008] [<c0216879>] locking_selftest+0x915/0x1a58
> [ 0.000008] [<c04fa8f3>] start_kernel+0x27d/0x34f
> [ 0.000008] =======================
> [ 0.000008]
> [ 0.000008] sirq-safe-A => hirqs-on/21:irq event stamp: 476
> [ 0.000008] hardirqs last enabled at (476): [<c020e1e7>] irqsafe2A_spin_21+0x1c/0xc7
> [ 0.000008] hardirqs last disabled at (475): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (468): [<c020e4c1>] irqsafe2A_rlock_12+0xa1/0xc7
> [ 0.000008] softirqs last disabled at (464): [<c020e42c>] irqsafe2A_rlock_12+0xc/0xc7
> [ 0.000008] ok |irq event stamp: 480
> [ 0.000008] hardirqs last enabled at (480): [<c020e375>] irqsafe2A_wlock_21+0x1c/0xc7
> [ 0.000008] hardirqs last disabled at (479): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (468): [<c020e4c1>] irqsafe2A_rlock_12+0xa1/0xc7
> [ 0.000008] softirqs last disabled at (464): [<c020e42c>] irqsafe2A_rlock_12+0xc/0xc7
> [ 0.000008] ok |irq event stamp: 484
> [ 0.000008] hardirqs last enabled at (484): [<c020e503>] irqsafe2A_rlock_21+0x1c/0xc7
> [ 0.000008] hardirqs last disabled at (483): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (468): [<c020e4c1>] irqsafe2A_rlock_12+0xa1/0xc7
> [ 0.000008] softirqs last disabled at (464): [<c020e42c>] irqsafe2A_rlock_12+0xc/0xc7
> [ 0.000008] FAILED| [<c0105276>] dump_trace+0x63/0x1eb
> [ 0.000008] [<c0105418>] show_trace_log_lvl+0x1a/0x30
> [ 0.000008] [<c010605a>] show_trace+0x12/0x14
> [ 0.000008] [<c01060f7>] dump_stack+0x16/0x18
> [ 0.000008] [<c020c0eb>] dotest+0x8d/0x3f4
> [ 0.000008] [<c02168cf>] locking_selftest+0x96b/0x1a58
> [ 0.000008] [<c04fa8f3>] start_kernel+0x27d/0x34f
> [ 0.000008] =======================
> [ 0.000008]
> [ 0.000008] hard-safe-A + irqs-on/12: ok | ok |irq event stamp: 500
> [ 0.000008] hardirqs last enabled at (500): [<c0212873>] irqsafe2B_hard_rlock_12+0xaf/0xc0
> [ 0.000008] hardirqs last disabled at (499): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (468): [<c020e4c1>] irqsafe2A_rlock_12+0xa1/0xc7
> [ 0.000008] softirqs last disabled at (464): [<c020e42c>] irqsafe2A_rlock_12+0xc/0xc7
> [ 0.000008] FAILED| [<c0105276>] dump_trace+0x63/0x1eb
> [ 0.000008] [<c0105418>] show_trace_log_lvl+0x1a/0x30
> [ 0.000008] [<c010605a>] show_trace+0x12/0x14
> [ 0.000008] [<c01060f7>] dump_stack+0x16/0x18
> [ 0.000008] [<c020c0eb>] dotest+0x8d/0x3f4
> [ 0.000008] [<c0216925>] locking_selftest+0x9c1/0x1a58
> [ 0.000008] [<c04fa8f3>] start_kernel+0x27d/0x34f
> [ 0.000008] =======================
> [ 0.000008]
> [ 0.000008] soft-safe-A + irqs-on/12: ok | ok |irq event stamp: 534
> [ 0.000008] hardirqs last enabled at (534): [<c0129748>] local_bh_enable+0x1b9/0x1e5
> [ 0.000008] hardirqs last disabled at (533): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (532): [<c020e7ed>] irqsafe2B_soft_rlock_12+0xb5/0xc5
> [ 0.000008] softirqs last disabled at (530): [<c020e7de>] irqsafe2B_soft_rlock_12+0xa6/0xc5
> [ 0.000008] FAILED| [<c0105276>] dump_trace+0x63/0x1eb
> [ 0.000008] [<c0105418>] show_trace_log_lvl+0x1a/0x30
> [ 0.000008] [<c010605a>] show_trace+0x12/0x14
> [ 0.000008] [<c01060f7>] dump_stack+0x16/0x18
> [ 0.000008] [<c020c0eb>] dotest+0x8d/0x3f4
> [ 0.000008] [<c021697b>] locking_selftest+0xa17/0x1a58
> [ 0.000008] [<c04fa8f3>] start_kernel+0x27d/0x34f
> [ 0.000008] =======================
> [ 0.000008]
> [ 0.000008] hard-safe-A + irqs-on/21:irq event stamp: 538
> [ 0.000008] hardirqs last enabled at (538): [<c0212720>] irqsafe2B_hard_spin_21+0x1c/0xc0
> [ 0.000008] hardirqs last disabled at (537): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (532): [<c020e7ed>] irqsafe2B_soft_rlock_12+0xb5/0xc5
> [ 0.000008] softirqs last disabled at (530): [<c020e7de>] irqsafe2B_soft_rlock_12+0xa6/0xc5
> [ 0.000008] ok |irq event stamp: 542
> [ 0.000008] hardirqs last enabled at (542): [<c0212a20>] irqsafe2B_hard_wlock_21+0x1c/0xc0
> [ 0.000008] hardirqs last disabled at (541): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (532): [<c020e7ed>] irqsafe2B_soft_rlock_12+0xb5/0xc5
> [ 0.000008] softirqs last disabled at (530): [<c020e7de>] irqsafe2B_soft_rlock_12+0xa6/0xc5
> [ 0.000008] ok |irq event stamp: 546
> [ 0.000008] hardirqs last enabled at (546): [<c02128a0>] irqsafe2B_hard_rlock_21+0x1c/0xc0
> [ 0.000008] hardirqs last disabled at (545): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (532): [<c020e7ed>] irqsafe2B_soft_rlock_12+0xb5/0xc5
> [ 0.000008] softirqs last disabled at (530): [<c020e7de>] irqsafe2B_soft_rlock_12+0xa6/0xc5
> [ 0.000008] FAILED| [<c0105276>] dump_trace+0x63/0x1eb
> [ 0.000008] [<c0105418>] show_trace_log_lvl+0x1a/0x30
> [ 0.000008] [<c010605a>] show_trace+0x12/0x14
> [ 0.000008] [<c01060f7>] dump_stack+0x16/0x18
> [ 0.000008] [<c020c0eb>] dotest+0x8d/0x3f4
> [ 0.000008] [<c02169d1>] locking_selftest+0xa6d/0x1a58
> [ 0.000008] [<c04fa8f3>] start_kernel+0x27d/0x34f
> [ 0.000008] =======================
> [ 0.000008]
> [ 0.000008] soft-safe-A + irqs-on/21:irq event stamp: 552
> [ 0.000008] hardirqs last enabled at (552): [<c0129748>] local_bh_enable+0x1b9/0x1e5
> [ 0.000008] hardirqs last disabled at (551): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (550): [<c020e68e>] irqsafe2B_soft_spin_21+0x1b/0xc5
> [ 0.000008] softirqs last disabled at (548): [<c020e67f>] irqsafe2B_soft_spin_21+0xc/0xc5
> [ 0.000008] ok |irq event stamp: 558
> [ 0.000008] hardirqs last enabled at (558): [<c0129748>] local_bh_enable+0x1b9/0x1e5
> [ 0.000008] hardirqs last disabled at (557): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (556): [<c020e9a2>] irqsafe2B_soft_wlock_21+0x1b/0xc5
> [ 0.000008] softirqs last disabled at (554): [<c020e993>] irqsafe2B_soft_wlock_21+0xc/0xc5
> [ 0.000008] ok |irq event stamp: 564
> [ 0.000008] hardirqs last enabled at (564): [<c0129748>] local_bh_enable+0x1b9/0x1e5
> [ 0.000008] hardirqs last disabled at (563): [<c010a900>] native_sched_clock+0x70/0x118
> [ 0.000008] softirqs last enabled at (562): [<c020e818>] irqsafe2B_soft_rlock_21+0x1b/0xc5
> [ 0.000008] softirqs last disabled at (560): [<c020e809>] irqsafe2B_soft_rlock_21+0xc/0xc5
> [ 0.000008] FAILED| [<c0105276>] dump_trace+0x63/0x1eb
> [ 0.000008] [<c0105418>] show_trace_log_lvl+0x1a/0x30
> [ 0.000008] [<c010605a>] show_trace+0x12/0x14
> [ 0.000008] [<c01060f7>] dump_stack+0x16/0x18
> [ 0.000008] [<c020c0eb>] dotest+0x8d/0x3f4
> [ 0.000008] [<c0216a27>] locking_selftest+0xac3/0x1a58
> [ 0.000008] [<c04fa8f3>] start_kernel+0x27d/0x34f
> [ 0.000008] =======================
> [ 0.000008]
> [ 0.000008] hard-safe-A + unsafe-B #1/123: ok | ok | ok |
> [ 0.000008] soft-safe-A + unsafe-B #1/123: ok | ok | ok |
> [ 0.000009] hard-safe-A + unsafe-B #1/132: ok | ok | ok |
> [ 0.000009] soft-safe-A + unsafe-B #1/132: ok | ok | ok |
> [ 0.000009] hard-safe-A + unsafe-B #1/213: ok | ok | ok |
> [ 0.000010] soft-safe-A + unsafe-B #1/213: ok | ok | ok |
> [ 0.000010] hard-safe-A + unsafe-B #1/231: ok | ok | ok |
> [ 0.000010] soft-safe-A + unsafe-B #1/231: ok | ok | ok |
> [ 0.000010] hard-safe-A + unsafe-B #1/312: ok | ok | ok |
> [ 0.000010] soft-safe-A + unsafe-B #1/312: ok | ok | ok |
> [ 0.000011] hard-safe-A + unsafe-B #1/321: ok | ok | ok |
> [ 0.000011] soft-safe-A + unsafe-B #1/321: ok | ok | ok |
> [ 0.000011] hard-safe-A + unsafe-B #2/123: ok | ok | ok |
> [ 0.000011] soft-safe-A + unsafe-B #2/123: ok | ok | ok |
> [ 0.000011] hard-safe-A + unsafe-B #2/132: ok | ok | ok |
> [ 0.000012] soft-safe-A + unsafe-B #2/132: ok | ok | ok |
> [ 0.000012] hard-safe-A + unsafe-B #2/213: ok | ok | ok |
> [ 0.000012] soft-safe-A + unsafe-B #2/213: ok | ok | ok |
> [ 0.000012] hard-safe-A + unsafe-B #2/231: ok | ok | ok |
> [ 0.000013] soft-safe-A + unsafe-B #2/231: ok | ok | ok |
> [ 0.000013] hard-safe-A + unsafe-B #2/312: ok | ok | ok |
> [ 0.000013] soft-safe-A + unsafe-B #2/312: ok | ok | ok |
> [ 0.000013] hard-safe-A + unsafe-B #2/321: ok | ok | ok |
> [ 0.000013] soft-safe-A + unsafe-B #2/321: ok | ok | ok |
> [ 0.000014] hard-irq lock-inversion/123: ok | ok | ok |
> [ 0.000014] soft-irq lock-inversion/123: ok | ok | ok |
> [ 0.000014] hard-irq lock-inversion/132: ok | ok | ok |
> [ 0.000014] soft-irq lock-inversion/132: ok | ok | ok |
> [ 0.000014] hard-irq lock-inversion/213: ok | ok | ok |
> [ 0.000015] soft-irq lock-inversion/213: ok | ok | ok |
> [ 0.000015] hard-irq lock-inversion/231: ok | ok | ok |
> [ 0.000015] soft-irq lock-inversion/231: ok | ok | ok |
> [ 0.000015] hard-irq lock-inversion/312: ok | ok | ok |
> [ 0.000015] soft-irq lock-inversion/312: ok | ok | ok |
> [ 0.000016] hard-irq lock-inversion/321: ok | ok | ok |
> [ 0.000016] soft-irq lock-inversion/321: ok | ok | ok |
> [ 0.000016] hard-irq read-recursion/123: ok |
> [ 0.000016] soft-irq read-recursion/123: ok |
> [ 0.000016] hard-irq read-recursion/132: ok |
> [ 0.000016] soft-irq read-recursion/132: ok |
> [ 0.000016] hard-irq read-recursion/213: ok |
> [ 0.000016] soft-irq read-recursion/213: ok |
> [ 0.000016] hard-irq read-recursion/231: ok |
> [ 0.000017] soft-irq read-recursion/231: ok |
> [ 0.000017] hard-irq read-recursion/312: ok |
> [ 0.000017] soft-irq read-recursion/312: ok |
> [ 0.000017] hard-irq read-recursion/321: ok |
> [ 0.000017] soft-irq read-recursion/321: ok |
> [ 0.000017] -----------------------------------------------------------------
> [ 0.000017] BUG: 6 unexpected failures (out of 218) - debugging disabled! |
> [ 0.000017] -----------------------------------------------------------------
>
> http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/broken-out-2007-05-10-03-06/mm-config
> http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/broken-out-2007-05-10-03-06/mm-dmesg
>
> Regards,
> Michal
>
>
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