Messages in this thread | | | Date | Tue, 11 Mar 2003 23:19:02 +0200 | From | Abraham van der Merwe <> | Subject | Re: kernel panic: bug in sch_sfq.c |
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Hi kuznet!
> > Also, if I compile the kernel with all debugging enabled (CONFIG_DEBUG_SLAB, > > etc) I can reliably trigger the BUG() on line 1263 in mm/slab.c > > How does backtrace oops look?
I didn't write down most of the BUG() panics, but here is one (unfortunately it doesn't have any QoS code in the stack trace):
------------< snip <------< snip <------< snip <------------ root@trillian:~/uni-qos# cat panic.txt c0192eb1 c0176c8c c017718c c0176afa c010810f c01082b3 c0105240 c0105240 c0105240 c0105240 c0105263 c01052d2 c0105000 c0105027
0f 0b ef 04 e0 87 1e c0 f7 c5 00 04 00 00 74 36 b8 a5 c2 0f
EIP: 0010:c012642e ESP: c0221eb4
KERNEL BUG slab.c:1263 root@trillian:~/uni-qos# ------------< snip <------< snip <------< snip <------------
A quick objdump through the kernel's vmlinux image reveals, that the stack trace above looks as follows:
------------< snip <------< snip <------< snip <------------ c0192eb1 alloc_skb c0176c8c speedo_refill_rx_buf c017718c speedo_rx c0176afa speedo_interrupt c010810f handle_IRQ_event c01082b3 do_IRQ c0105240 default_idle c0105240 default_idle c0105240 default_idle c0105240 c0105263 default_idle c01052d2 cpu_idle c0105000 rest_init c0105027 rest_init ------------< snip <------< snip <------< snip <------------
It crashes when it hits BUG(); in slab.c:
------------< snip <------< snip <------< snip <------------ #if DEBUG if (cachep->flags & SLAB_POISON) if (kmem_check_poison_obj(cachep, objp)) BUG(); ------------< snip <------< snip <------< snip <------------
--
Regards Abraham
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___________________________________________________ Abraham vd Merwe - Frogfoot Networks CC 9 Kinnaird Court, 33 Main Street, Newlands, 7700 Phone: +27 21 686 1674 Cell: +27 82 565 4451 Http: http://www.frogfoot.net/ Email: abz@frogfoot.net
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