Re: [RFC] coredump: Do not interrupt dump for TIF_NOTIFY_SIGNAL

[Linus Torvalds]

On Wed, Jun 9, 2021 at 1:48 PM Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote:
>
> It looks like it would need to be:
>
> static bool dump_interrupted(void)
> {
>         return fatal_signal_pending() || freezing();
> }
>
> As the original implementation of dump_interrupted 528f827ee0bb
> ("coredump: introduce dump_interrupted()") is deliberately allowing the
> freezer to terminate the core dumps to allow for reliable system
> suspend.

Ack. That would seem to be the right conversion to do.

Now, I'm not sure if system suspend really should abort a core dump,
but it's clearly what we have done in the past.

Maybe we'd like to remove that "|| freezing()" at some point, but
that's a separate discussion, I think. At least having it in that form
makes it all very explicit, instead of the current very subtle exact
interaction with the TIF_NOTIFY_SIGNAL bit (that has other meanings).

Hmm?

             Linus