Ingo,
I hit this bug on one of my work test machines. This bug is probably what
caused my laptop to crash ever so often too, but since I don't have a
serial or other debug output, my laptop never showed what was wrong.
Here's the call trace:
------------[ cut here ]------------
kernel BUG at kernel/rtmutex.c:649!
invalid opcode: 0000 [1] PREEMPT SMP
CPU 2
[...]
Call Trace:
[<ffffffff802661a7>] rt_spin_lock+0x1f/0x21
[<ffffffff802df73b>] drain_freelist+0x4f/0xeb
[<ffffffff802df941>] cache_reap+0x16a/0x26d
[<ffffffff8024f29e>] run_workqueue+0x9f/0xf9
[<ffffffff8024bbe3>] worker_thread+0x11b/0x152
[<ffffffff80233fcb>] kthread+0xee/0x11a
[<ffffffff802600f8>] child_rip+0xa/0x12
Seems that the goto out of the loop was not updated to be a
slab_spin_unlock, so there was a way out that would not unlock the slab
cpu lock.
-- Steve
Signed-off-by: Steven Rostedt <[email protected]>
Index: linux-2.6.20-rc5-rt7/mm/slab.c
===================================================================
--- linux-2.6.20-rc5-rt7.orig/mm/slab.c 2007-01-22 14:05:35.000000000 -0500
+++ linux-2.6.20-rc5-rt7/mm/slab.c 2007-01-22 14:06:07.000000000 -0500
@@ -2564,7 +2564,7 @@ static int drain_freelist(struct kmem_ca
slab_spin_lock_irq(&l3->list_lock, this_cpu);
p = l3->slabs_free.prev;
if (p == &l3->slabs_free) {
- spin_unlock_irq(&l3->list_lock);
+ slab_spin_unlock_irq(&l3->list_lock, this_cpu);
goto out;
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
