Messages in this thread | | | Date | Sat, 4 Dec 1999 14:53:35 +0100 (CET) | From | Andrea Arcangeli <> | Subject | Re: [patch] new spinlock variant, spinlock-2.3.30-A4 |
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On 4 Dec 1999, Dimitris Michailidis wrote:
>It doesn't work this way. Stores can be forwarded to reads within a CPU >before they become externally visible. Your suggestion would considerably >hurt SMP performance.
I only wanted to tell how things should work in hardware to avoid us to put lock on the bus to prevent the CPU to reorder instruction. Of course I agree it doesn't work this way otherwise the testcase wouldn't deadlock ;).
Andrea
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