Messages in this thread | | | Date | Mon, 25 Mar 2002 10:04:26 +0200 (SAST) | From | Zwane Mwaikambo <> | Subject | Re: preempt-related hangs |
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On Sun, 24 Mar 2002, Andrew Morton wrote:
> I sent this email to Ingo last week; seems that he's > having some downtime. It was happening on my dual PIII > and I now discover that the quad pIII does the same > thing. Any ideas? > > > Kernel is 2.5.7, dual PIII. When I enable preempt it > locks during boot.
same 2.5.7 here with quad ppro emulation, i have preempt disabled.
> I applied the kgdb patch and had a poke. > > (gdb) info threads > * 6 Thread 6 preempt_schedule () at sched.c:848 > 5 Thread 5 preempt_schedule () at sched.c:848 > 4 Thread 4 context_thread (startup=0xc0395f90) at context.c:101 > 3 Thread 3 migration_thread (unused=0x0) at sched.c:1646 > 2 Thread 2 migration_thread (unused=0x0) at sched.c:1646 > 1 Thread 1 spawn_ksoftirqd () at softirq.c:407 > > Note that init is stuck in spawn_ksoftirqd. It's spinning in > that function, yielding, waiting for the softirqd threads to > come alive. They're threads 5 and 6.
I'm locking in the same place i have my last CPU spinning, waiting for its softirqd thread. Then i get a smp_migrate_task IPI from an alive CPU, at which case i'm stuck.
Zwane
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