Kay Sievers wrote:
> On Fri, 2007-12-07 at 23:05 -0600, Bob Tracy wrote:
> > Kay Sievers wrote:
> > > Is the udev daemon (still) running while it fails?
> >
> > Yes, and there's something else I forgot to mention that may be
> > significant... For the bad case, in addition to udevd, "ps -ef"
> > shows a "sh -e /lib/udev/net.agent" running with a PPID of 1. This
> > process doesn't exit until I reboot. If this is normal under the
> > circumstances, please disregard.
>
> Does SysRq-T show where it hangs?
A quick comparison of the trace sections for udevd and net.agent indicates
those traces are identical: none of the function names in the traces appear
to be what you might be looking for, i.e., the processes appear to have been
waiting for an event of some kind, and woke up long enough to process the
SysRq-T keyboard interrupt and the corresponding action.
Hmm... Ok... The state information itself is probably more useful in
this context. Here's the info for net.agent:
net.agent S fffffc000032c37c 0 895 1
fffffc0000743b10 0000000000000010 fffffc00004f3b5c fffffc00007601a8
0000000000000001 0000000000000074 fffffc0000747758 fffffc00230f0000
0000000000000007 0000000000000007 fffffc00004f390c 0000000000000010
fffffc00004e9eb8 fffffc00230f0000 0000000000000014 fffffc0023085140
0000000000000001 0000000000000014 fffffc00001de000 0000000000000001
fffffc000055dcfc fffffc0023085140 fffffc00232788c0 0000000000000001
Addresses of presumed interest from System.map:
fffffc000032c000 t do_wait
fffffc0000740000 D init_thread_union
fffffc00004f3b40 t sysrq_handle_showstate
fffffc00007601a8 d sysrq_showstate_op
fffffc0000747758 D console_printk
fffffc002... not in System.map (module?) -- I'll track this down later
if needed.
fffffc00004f3850 T __handle_sysrq
fffffc00004e9850 t kbd_event
fffffc00001... not in System.map (?? begins with fffffc0000300000 A swapper_pg_dir)
fffffc000055dc30 t input_pass_event
--Bob T.
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