On Fri, Jan 11, 2019 at 10:16:38AM +0100, Peter Zijlstra wrote:
> > Not for debug exception, for MCE exception handler I found below two:
> >
> > do_machine_check->mce_report_event->schedule_work
That has been the case at least since 2009. We probably never hit it or
I've never seen a deadlock caused by it.
> > do_machine_check->force_sig->force_sig_info
This does:
ist_begin_non_atomic(regs);
local_irq_enable();
before forcing the signal. And there's blurb above
ist_begin_non_atomic() why it is OK to schedule when the exception came
from usermode.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
