Re: Fix signalfd interaction with thread-private signals

Davide Libenzi
2007-06-19T19:53:46Z

On Tue, 19 Jun 2007, Oleg Nesterov wrote:

> On 06/19, Benjamin Herrenschmidt wrote:
> >
> > On Tue, 2007-06-19 at 13:14 +0400, Oleg Nesterov wrote:
> >
> > > The commited "Fix signalfd interaction with thread-private signals"
> > > (commit caec4e8dc85e0644ec24aeb36285e1ba02da58cc) doesn't implement
> > > this.
> >
> > Indeed, if you want what Davide described, you need to also change
> > signalfd side. The patch I did merely prevents another thread from
> > dequeuing somebody else private signals.
>
> Yes I see, but why do we need this change? Yes, we can dequeue SIGSEGV
> from another thread. Just don't do it if you have a handler for SIGSEGV?

I believe it can be confusing to have private signals dequeued from
another thread. The kernel expect those to be dequeued by the target
thread.

- Davide