Re: [RFC][PATCH 2/3] perf_counter: executable mmap() information

From: Paul Mackerras
Date: Thu Mar 26 2009 - 06:57:24 EST


Ingo Molnar writes:

> * Paul Mackerras <paulus@xxxxxxxxx> wrote:
>
> > Peter Zijlstra writes:
> >
> > > --- linux-2.6.orig/include/linux/perf_counter.h
> > > +++ linux-2.6/include/linux/perf_counter.h
> > > @@ -137,7 +137,9 @@ struct perf_counter_hw_event {
> > > exclude_kernel : 1, /* ditto kernel */
> > > exclude_hv : 1, /* ditto hypervisor */
> > > exclude_idle : 1, /* don't count when idle */
> > > - include_tid : 1, /* include the tid */
> > > + include_tid : 1, /* include the tid */
> > > + mmap : 1, /* include mmap data */
> > > + munmap : 1, /* include munmap data */
> > >
> > > __reserved_1 : 54;
> >
> > Nit: need to adjust the size of __reserved_1 here. Or maybe just
> > get rid of it?
>
> it's nice to have a constant reminder about how many bits there are
> left.

Fair enough, but as it stands, we've changed the ABI, so we need to
fix it.

Paul.
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