Re: [PATCH] Use ERESTARTNOHAND if poll() is interrupted by a signal

[Chris Wright <chrisw@sous-sol.org>]

* Manfred Spraul (manfred@colorfullife.com) wrote:
> poll() returns -EINTR if a signal is pending.
> EINTR is a bad choice: it means that poll returns to user space if the
> task is stopped by SIGSTOP/SIGCONT or by the freezer.
> select() and ppoll() both use ERESTARTNOHAND, this avoids a return to
> user space for signals that are handled by the kernel.

This does change user visible behaviour, however, it's already
inconsistent as you've noted.  I was concerned about that change, but
wrote some tests and this behaviour does make sense to me.

thanks,
-chris
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