Messages in this thread | | | Date | Wed, 30 Jun 2010 09:49:20 +0100 | From | "Jan Beulich" <> | Subject | Re: [PATCH 4/4, v2] x86: enlightenment for ticket spin locks - improve yield behavior on Xen |
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>>> On 30.06.10 at 10:11, Peter Zijlstra <peterz@infradead.org> wrote: > On Tue, 2010-06-29 at 15:35 +0100, Jan Beulich wrote: >> >> The (only) additional overhead this introduces for native execution is >> the writing of the owning CPU in the lock acquire paths. > > Uhm, and growing the size of spinlock_t to 6 (or 8 bytes when aligned) > bytes when NR_CPUS>256.
Indeed, I should have mentioned that. Will do so in an eventual next version.
Jan
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