Re: [BUG?][2.6.25-mm1] sleeping during IRQ disabled

Petr Tesarik
2008-05-05T15:43:02Z

On Mon, 2008-05-05 at 10:40 +0200, Petr Tesarik wrote:
> On Mon, 2008-05-05 at 00:47 +0900, KOSAKI Motohiro wrote:
> > Hi Tony-san,
> >
> > > > > This surely is a bug. I bet this was introduced by Hidetoshi's latest
> > > > > commit:
> > > > >
> > > > > commit 38477ad75188b2a7370fef7145f956e6c446928b
> > > > > Author: Hidetoshi Seto
> > > > > Date: Mon Apr 21 14:34:39 2008 -0700
> > > > >
> > > > > [IA64] disable interrupts on exit of ia64_trace_syscall
> > > >
> > > > Can you try reverting this patch and re-running the
> > > > same stress tests?
> > >
> > > OK, I'll try it at head of next week.
> >
> > Hmmm,
> > if I am not stupid, I think 2.6.25-mm1 doesn't contain this patch.
> > I am very confusing now...
>
> You're right, this patch is not present in -mm1. I'm sorry for the
> noise.
>
> > and, I found easy reproduce way.
> > that is
> >
> > % pstack $$
> >
> > Can you reproduce it?
>
> Thank you for isolating the test case!
>
> I tried SUSE Factory, which is a 2.6.25 (and was readily available to
> me), and I could not reproduce it. I used gstack from gdb 6.6, because I
> couldn't find a true pstack for Linux. I'm now compiling -mm1 to see if
> it makes any difference. I can also try on a larger machine (the testing
> one is a real small Altix 350 with 2 cores).

Unfortunately, I was not able to reproduce the bug you're seeing. Maybe
it depends on a specific config option..?

Petr