On 06/14, Steven Rostedt wrote:
>
> On Fri, 2013-06-14 at 18:04 +0200, Oleg Nesterov wrote:
> >
> > But the main problem is, synchronize_sched() is slow and it is called
> > under the global event_mutex.
>
> But is that really an issue? event_mutex is used to add or remove
> events, and this happen
On Fri, 2013-06-14 at 18:04 +0200, Oleg Nesterov wrote:
> On 06/14, Oleg Nesterov wrote:
> >
> > > -probe_event_enable(struct trace_uprobe *tu, int flag, filter_func_t
> > > filter)
> > > +probe_event_enable(struct trace_uprobe *tu, struct ftrace_event_file
> > > *file,
> > > +filter_
On 06/14, Oleg Nesterov wrote:
>
> So perhaps something like below (untested) makes sense? With this patch
> we can trivially convert trace_kprobe.c to use list_add/del/each_rcu.
Forgot to mention, the patch is obviously incomplete, __kprobe_trace_func()
can see the "dead" file even if its memory
On 06/14, Oleg Nesterov wrote:
>
> > -probe_event_enable(struct trace_uprobe *tu, int flag, filter_func_t filter)
> > +probe_event_enable(struct trace_uprobe *tu, struct ftrace_event_file *file,
> > + filter_func_t filter)
> > {
> > + int enabled = 0;
> > int ret = 0;
> >
> > +
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