Messages in this thread | | | Subject | Re: PATCH? trace_remove_event_call() should fail if call is active | From | Steven Rostedt <> | Date | Wed, 03 Jul 2013 20:19:35 -0400 |
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On Thu, 2013-07-04 at 00:18 +0200, Oleg Nesterov wrote: > On 07/03, Steven Rostedt wrote: > > > > No, I would avoid any changes to the debugfs infrastructure. > > YEs, agreed. > > > OK, what about the below patch, followed by an updated version of your > > patch. I'll send that as a reply to this one. > > Steven, you do understand that I can't review the changes in this area.
I have more faith in you than you do ;-)
> > But at first glance, _I think_ this should work. And this is much simpler, > ->open() blocks trace_remove_event_call() (you added TRACE_EVENT_FL_REF_MASK > check into the next patch).
Yep.
> > Which tree this patch is based on? I have pulled linux-trace.git#for-next > and I do not see tracing_open_generic_file/etc in trace_events.c.
Ug! Thanks! I posted my [for-next] series but never pushed it to my git tree. I just pushed it now. I'm glad you told me this because I was under the assumption that the code was already in my kernel.org repo, and I would have pushed to Linus thinking it was already in linux-next and would have been embarrassed if something went wrong.
> > I do not understand what protects call->flags, I guess there is another > lock which I do not see in my tree?
Those flags should only be set under the event_mutex lock. But I see I didn't do that :-) Yeah, I need to add locks for that.
See, you can review my patch and provide valuable feedback!
-- Steve
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