Re: [PATCH] signal/x86: Delay calling signals in atomic

[Thomas Gleixner]

On Mon, Mar 28 2022 at 09:25, Eric W. Biederman wrote:
> Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> writes:
> Further this code is buggy.  TIF_NOTIFY_RESUME is not the correct
> flag to set to enter into exit_to_usermode_loop.  TIF_NOTIFY_RESUME is
> about that happens after signal handling.  This very much needs to be
> TIF_SIGPENDING with recalc_sigpending and friends updated to know about
> "task->force_info".
>
> Does someone own this problem?  Can that person please fix this
> properly?
>
> I really don't think it is going to be maintainable for PREEMPT_RT to
> maintain a separate signal delivery path for faults from the rest of
> linux.

Fair enough. Let me queue a revert and go back to the drawing board.

Thanks,

        tglx