Oops in schedule in 2.5.24
Hi,
I decided to give 2.5.24 a try now when IDE94 and IDE95 were out.
So I applied IDE94/95 and built usual kernel (PIII, SMP) for my UP P4 host. And it died with
Unable to handle kernel NULL reference to 0x0000002A
Call trace: schedule + 491/1102
sys_sched_yield + 444/455
syscallQuoted 1 line
From looking at the code, it looks like that
queue->next(sched.c, line
866) was 0x00000002, so next happened to be 0xFFFFFFE2, and then it died when context_switch() tried to access next->mm :-( No idea how 0x000002 happened to be in queue->next.
Another explanation is that rq->idle was 0xFFFFFFE2, and rq->nr_running was 0. But it looks impossible too.
Does anybody have any idea what's wrong? Crash happened few minutes
after boot. For now I reverted back to 2.5.21-changeset1.493, which works flawlessly.
Box is running slapd (which invoked yield()) and grabs TV teletext
using bttv. Network card driver is e100. There should be always one process ready to run: dnetc.
Thanks,
Petr Vandrovec [email protected]