Re: [tip:core/locking] x86/smp: Move waiting on contended ticket lock out of line

[Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>]

On Wed, Feb 13, 2013 at 5:21 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> Now, on other machines you get the call chain even with pebs because
> you can get the whole

Oops, that got cut short early, because I started looking up when PEBS
and the last-branch-buffer work together, and couldn't find it, and
then came back to the email and forgot to finish the sentence.

Anyway: sometimes you get call chains with precise events, sometimes
you don't. And it turns out that I can't find out which cores do both,
and which ones don't.

                Linus
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