Re: [PATCH 4/4, v2] x86: enlightenment for ticket spin locks -improve yield behavior on Xen
From: Peter Zijlstra
Date: Wed Jun 30 2010 - 04:11:42 EST
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.
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