Re: [PATCHv2] trace-cmd: add kvm_mmu_prepare_zap_page even and fix kvm_mmu_get_page event output in kvm plugin

[Steven Rostedt <srostedt@redhat.com>]

On Mon, 2013-01-28 at 13:12 +0200, Gleb Natapov wrote:
> Ping.

Please send email (especially patches) to my rostedt@goodmis.org
account. I don't always read my RH email, except to skim it for RH
related work.

I may miss a patch in my goodmis account, but I will periodically purge
it (go through each email one by one and put them into special folders
or delete them). A patch missed will eventually be hit there. But that's
not the same for my RH account. A patch missed there, will never be seen
again.

Note, I'm still in November of my "purge" so a December patch will
probably take a week or two to see now ;-)

Anyway, I'll take a look at this patch and let you know.

Thanks,

-- Steve

> 
> On Thu, Dec 27, 2012 at 01:34:15PM +0200, Gleb Natapov wrote:
> > kvm_mmu_zap_page event was renamed to kvm_mmu_prepare_zap_page. Add new
> > even, but leave the old one to parse older traces.  Print out "created"
> > field for kvm_mmu_get_page event.
> > 
> > Signed-off-by: Gleb Natapov <gleb@redhat.com>
> > diff --git a/plugin_kvm.c b/plugin_kvm.c
> > index 55812ef..9b376d8 100644
> > --- a/plugin_kvm.c
> > +++ b/plugin_kvm.c
> > @@ -382,7 +382,7 @@ static int kvm_mmu_print_role(struct trace_seq *s, struct pevent_record *record,
> >  	} else
> >  		trace_seq_printf(s, "WORD: %08x", role.word);
> >  
> > -	pevent_print_num_field(s, " root %u",  event,
> > +	pevent_print_num_field(s, " root %u ",  event,
> >  			       "root_count", record, 1);
> >  
> >  	if (pevent_get_field_val(s, event, "unsync", record, &val, 1) < 0)
> > @@ -397,6 +397,11 @@ static int kvm_mmu_get_page_handler(struct trace_seq *s, struct pevent_record *r
> >  {
> >  	unsigned long long val;
> >  
> > +	if (pevent_get_field_val(s, event, "created", record, &val, 1) < 0)
> > +		return -1;
> > +
> > +	trace_seq_printf(s, "%s ", val ? "new" : "existing");
> > +
> >  	if (pevent_get_field_val(s, event, "gfn", record, &val, 1) < 0)
> >  		return -1;
> >  
> > @@ -433,5 +438,9 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
> >  	pevent_register_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_zap_page",
> >  				      kvm_mmu_print_role, NULL);
> >  
> > +	pevent_register_event_handler(pevent, -1, "kvmmmu",
> > +			"kvm_mmu_prepare_zap_page", kvm_mmu_print_role,
> > +			NULL);
> > +
> >  	return 0;
> >  }
> > --
> > 			Gleb.
> > --
> > To unsubscribe from this list: send the line "unsubscribe kvm" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> --
> 			Gleb.