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SubjectRe: wait_even_interruptible_timeout(), signal, spin_lock() = system hang
Date
I created a Bugzilla entry at 
https://bugzilla.kernel.org/show_bug.cgi?id=16139
for your bug report, please add your address to the CC list in there, thanks!

On piątek, 28 maja 2010 o 18:44:46 Shirish Pargaonkar wrote:
> After this sequence of calls, system hangs (smp, x86 box based with
> .34 kernel), can ping only.
> I have not been able to break in with Alt Sysrq t, working on that
>
> rc = wait_event_interruptible_timeout(ses->server->response_q,
> (midQ->midState != MID_REQUEST_SUBMITTED),
> timeout); if (rc < 0) {
> cFYI(1, ("command 0x%x interrupted", midQ->command));
> return -1;
> }
>
> and when function that invoking function after coming out with ERESTARTSYS
> (I kill the command with Ctrl C) calls
> spin_lock(&GlobalMid_Lock);
>
> system hangs. If I sleep before return -1 (e.g. msleep(1), no hang)
>
> I do not have to use wait_event_interruptible_timeout and no such problems
> with wait_event_timeout, it is only when signal/interrupt is involved, I
> run into this problem
>
> Any pointers/ideas what could be happening, would be really really
> appreciated.
>
> Regards,
>
> Shirish
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--
Maciej Rutecki
http://www.maciek.unixy.pl
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