Re: signalfd API issues (was Re: [PATCH/RFC] signal races/bugs, losing TIF_SIGPENDING and other woes)

[Paul Mackerras]

Jeff Dike writes:

> On Wed, Jun 06, 2007 at 12:50:04PM +1000, Benjamin Herrenschmidt wrote:
> > Yeah, synchronous signals should probably never be delivered to another
> > process, even via signalfd. There's no point delivering a SEGV to
> > somebody else :-)
> 
> Sure there is.  UML does exactly that - intercepting child signals
> (including SEGV) with wait.

What Ben was talking about was stealing a synchronous SEGV from a task
without stopping it, and as Ben says that makes no sense.
Intercepting a signal and stopping the task is reasonable, and that is
what ptrace does, and I assume also UML.

Paul.
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