Re: [PATCH 1/2] perf: Add persistent event facilities

[Borislav Petkov]

On Fri, May 18, 2012 at 04:14:22PM +0200, Peter Zijlstra wrote:
> On Fri, 2012-05-18 at 16:09 +0200, Borislav Petkov wrote:
> > What happens here if a second user wants to enable a second set of
> > persistent events, allocate a second set of per-CPU buffers? 
> 
> I'm not seeing the relation to VM_SHARED here.

Well, in the sense that if mmap fails in the !VM_SHARED case, I can't
enable any persistent events except the ones which are enabled and so
I need to allocate another set of resources for that second persistent
events user.

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Boris.

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