Messages in this thread | | | Date | Fri, 3 Dec 1999 21:46:57 +0100 (CET) | From | Andrea Arcangeli <> | Subject | Re: [patch] new spinlock variant, spinlock-2.3.30-A4 |
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On Tue, 30 Nov 1999, Ingo Molnar wrote:
>no, spin_lock() must guarantee that instructions within the critical >section only execute at one CPU at once. Ie. all effects of the critical
Without the lock on the bus reads could happen before the spin_lock(). Thus instructions into the critical section would execute on two CPUs at the same time.
Andrea
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