Re: [patch] x86, perf: avoid spamming kernel log for bts buffer failure

From: Peter Zijlstra
Date: Tue Jul 15 2014 - 04:54:07 EST

On Mon, Jul 14, 2014 at 04:33:47PM -0700, David Rientjes wrote:
> On Mon, 30 Jun 2014, David Rientjes wrote:
> > It's unnecessary to excessively spam the kernel log anytime the BTS buffer
> > cannot be allocated, so make this allocation __GFP_NOWARN.
> >
> > The user probably will want to at least find some artifact that the
> > allocation has failed in the past, probably due to fragmentation because
> > of its large size, when it's not allocated at bootstrap. Thus, add a
> > WARN_ONCE() so something is left behind for them to understand why perf
> > commnads that require PEBS is not working properly.
> >
> > Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
> Peter, would you like to ack this? Trying to get this merged in time for
> the next merge window.

I've queued it; still don't like it though.

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