Messages in this thread | | | Subject | Re: [PATCH v2] core, x86: Add user return notifiers | From | Peter Zijlstra <> | Date | Tue, 22 Sep 2009 18:55:54 +0200 |
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On Tue, 2009-09-22 at 19:52 +0300, Avi Kivity wrote: > On 09/22/2009 07:50 PM, Peter Zijlstra wrote: > >> Would be nice to convert some existing open-coded return-to-user-space > >> logic to this facility. One such candidate would be lockdep_sys_exit? > >> > > And here I was thinking this was one of the hottest code paths in the > > whole kernel... > > > > If you're using lockdep, surely that's not your biggest worry?
No, but that's all under #ifdef and fully disappears when not enabled. Generic return-tu-user notifiers don't sound like they will though.
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