Re: spin_unlock optimization(i386)

Andrea Arcangeli (andrea@suse.de)
Mon, 29 Nov 1999 21:28:23 +0100 (CET)


On Mon, 29 Nov 1999, Gerard Roudier wrote:

>Why do you continue to seem to ignore the CPU write buffers, or just seem

Because the write buffer as documented is not allowed to show changes to
the other cpus not in processor order. It can only delay the writes
undefinitely but that make no difference at all for SMP.

If the write buffer would be allowed to cache writes and then to show the
changes to the other CPUS in its preferred order (as on Alpha for example)
then I would consider it of course.

Andrea

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