Re: [PATCH] perf powerpc: Don't call perf_event_disable from atomic context

[Jiri Olsa]

On Tue, Oct 04, 2016 at 03:29:33PM +1100, Michael Ellerman wrote:

SNIP

> Which is where we cope with the possibility that we couldn't emulate the
> instruction that hit the breakpoint. Seems that is not an issue on x86,
> or it's handled elsewhere?
> 
> We should fix emulate_step() if it failed to emulate something it
> should have, but there will always be the possibility that it fails.
> 
> Instead of calling perf_event_disable() we could just add a flag to
> arch_hw_breakpoint that says we hit an error on the event, and block
> reinstalling it in arch_install_hw_breakpoint().

ok, might be easier.. I'll check on that

thanks,
jirka