Re: [PATCH 2.6.12.5] NPTL signal delivery deadlock fix

From: Roland McGrath
Date: Wed Aug 17 2005 - 14:19:07 EST


> * Bhavesh P. Davda (bhavesh@xxxxxxxxx) wrote:
> > This bug is quite subtle and only happens in a very interesting
> > situation where a real-time threaded process is in the middle of a
> > coredump when someone whacks it with a SIGKILL. However, this deadlock
> > leaves the system pretty hosed and you have to reboot to recover.
> >
> > Not good for real-time priority-preemption applications like our
> > telephony application, with 90+ real-time (SCHED_FIFO and SCHED_RR)
> > processes, many of them multi-threaded, interacting with each other for
> > high volume call processing.
>
> Nice catch, also looks like something for -stable series. Roland, any
> issue with this patch?

Ouch! That one must be my fault. I did a quick scan and didn't find any
other typos of that nature. This fix definitely should go in everywhere ASAP.


Thanks,
Roland
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