From owner-freebsd-current  Wed Jan  1  6:12:53 2003
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From: Soeren Schmidt <sos@spider.deepcore.dk>
Message-Id: <200301011412.h01ECc7c009474@spider.deepcore.dk>
Subject: Re: Panic during ata_resume (sound)
In-Reply-To: <20021231222651.B24167-100000@ury.york.ac.uk>
To: Gavin Atkinson <gavin@ury.york.ac.uk>
Date: Wed, 1 Jan 2003 15:12:38 +0100 (CET)
Cc: current@FreeBSD.ORG
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It seems Gavin Atkinson wrote:

This looks like a problem in the sound system, as the ATA driver 
prints the last 'done' line it has finished its resume code, and
the trace points at the mixer_reinit func...
That the ATA driver then locks in the dump code can have lots
of reasons, difficult to tell from the info provided....

> Another panic. Kernel from 19th Dec. Laptop suspended itself (for no
> reason), and upon resume got this: (again, laptop could not manage to do
> the dump, so this is hand transcribed)
> 
> wakeup from sleeping state (slept 00:02:53)
> ata0: resetting devices ..
> done
> ata1: resetting devices ..
> done
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x0
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc01fb093
> stack pointer           = 0x10:0xc874db48
> frame pointer           = 0x10:0xc874db68
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 13 (swi6: tty:sio clock)
> 
> Stopped at _mtx_lock_flags + 0x43     cmpl  $0xc03d16a0, 0(ebx)
> 
> _mtx_lock_flags() at _mtx_lock_flags+0x43
> mixer_reinit() at
> ds_ps_resume()
> bus_generic_resume()
> bus_generic_resume()
> bus_generic_resume()
> bus_generic_resume()
> bus_generic_resume()
> apm_resume()
> apm_processevent()
> apm_do_suspend()
> apm_timeout()
> softclock()
> ithread_loop()
> fork_exit()
> fork_trampoline()
> 
> _mtx_lock_flags+0x43 corresponds to the compare of the line
> KASSERT(m->mtx_object.lo_class == &lock_class_mtx_sleep, ....
> in kern_mutex.c. It looks like m == NULL.
> 
> I can't get any more information sadly, again the machine hung while
> trying to reset ther ATA channel for the dump.
> 
> Gavin
> 
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-Søren

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