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Message-Id: <1226616324.3343.58.camel@calx>
Date: Thu, 13 Nov 2008 16:45:24 -0600
From: Matt Mackall <mpm@...enic.com>
To: "Rafael J. Wysocki" <rjw@...k.pl>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: 2.6.28-rc4: inconsistent lock state durin s2ram
Just noticed this while looking to see if my iwlagn regression was still
around (doesn't seem to be):
[112342.899610] SMP alternatives: switching to UP code
[112343.045933]
[112343.045935] =================================
[112343.045937] [ INFO: inconsistent lock state ]
[112343.045941] 2.6.28-rc4 #40
[112343.045943] ---------------------------------
[112343.045945] inconsistent {in-hardirq-W} -> {hardirq-on-W} usage.
[112343.045949] ksoftirqd/0/4 [HC0[0]:SC1[1]:HE1:SE0] takes:
[112343.045951] (&rq->lock){++..}, at: [<ffffffff802493f5>]
sched_rt_period_timer+0xb9/0x1c7
[112343.045961] {in-hardirq-W} state was registered at:
[112343.045963] [<ffffffffffffffff>] 0xffffffffffffffff
[112343.045969] irq event stamp: 4112884
[112343.045972] hardirqs last enabled at (4112884):
[<ffffffff804ed8ca>] _spin_unlock_irq+0x24/0x2e
[112343.045978] hardirqs last disabled at (4112883):
[<ffffffff804eda92>] _spin_lock_irq+0x15/0x41
[112343.045983] softirqs last enabled at (4112876):
[<ffffffff8022674c>] call_softirq+0x1c/0x28
[112343.045989] softirqs last disabled at (4112881):
[<ffffffff8022674c>] call_softirq+0x1c/0x28
[112343.045994]
[112343.045995] other info that might help us debug this:
[112343.045997] no locks held by ksoftirqd/0/4.
[112343.045999]
[112343.046000] stack backtrace:
[112343.046003] Pid: 4, comm: ksoftirqd/0 Not tainted 2.6.28-rc4 #40
[112343.046006] Call Trace:
[112343.046008] <IRQ> [<ffffffff8026e41f>] print_usage_bug+0x1a3/0x1b2
[112343.046019] [<ffffffff8022f1dd>] save_stack_trace+0x22/0x3e
[112343.046023] [<ffffffff8026ee45>] mark_lock+0x5a9/0x91f
[112343.046028] [<ffffffff80270369>] __lock_acquire+0x6c2/0x14b2
[112343.046032] [<ffffffff802711e6>] lock_acquire+0x8d/0xba
[112343.046037] [<ffffffff802493f5>] sched_rt_period_timer+0xb9/0x1c7
[112343.046041] [<ffffffff804eda37>] _spin_lock+0x29/0x36
[112343.046045] [<ffffffff802493f5>] sched_rt_period_timer+0xb9/0x1c7
[112343.046050] [<ffffffff80355db7>] __next_cpu+0x19/0x26
[112343.046054] [<ffffffff802493f5>] sched_rt_period_timer+0xb9/0x1c7
[112343.046058] [<ffffffff804ed8ca>] _spin_unlock_irq+0x24/0x2e
[112343.046063] [<ffffffff8024933c>] sched_rt_period_timer+0x0/0x1c7
[112343.046068] [<ffffffff80264c82>] run_hrtimer_pending+0x61/0x10b
[112343.046073] [<ffffffff80254c83>] __do_softirq+0x8e/0x163
[112343.046077] [<ffffffff8022674c>] call_softirq+0x1c/0x28
[112343.046079] <EOI> [<ffffffff80227db5>] do_softirq+0x45/0xa5
[112343.046086] [<ffffffff8025452f>] ksoftirqd+0x56/0xcc
[112343.046090] [<ffffffff802544d9>] ksoftirqd+0x0/0xcc
[112343.046095] [<ffffffff8026257e>] kthread+0x47/0x73
[112343.046101] [<ffffffff804ed511>] trace_hardirqs_on_thunk+0x3a/0x3f
[112343.046105] [<ffffffff80226259>] child_rip+0xa/0x11
[112343.046109] [<ffffffff80225463>] restore_args+0x0/0x30
[112343.046114] [<ffffffff80262512>] kthreadd+0x187/0x1ac
[112343.046118] [<ffffffff80262537>] kthread+0x0/0x73
[112343.046122] [<ffffffff8022624f>] child_rip+0x0/0x11
--
Mathematics is the supreme nostalgia of our time.
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