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SubjectRe: br_read_lock SMP race fix
   Date: Fri, 28 Jul 2000 02:36:34 +0200 (CEST)
From: Andrea Arcangeli <andrea@suse.de>

Hmmm, are you really sure? I thought there was always a finite deadline
for a dirty buffer to be flushed to memory and to be made visible to all
other CPUs.

If you're right then we definitely need wmb() there ;).

Yes, I am really sure. In fact in the Sparc v9 architecture manual
they specifically give an example of a piece producer/consumer code
where this issue pops up and membars are needed.

Later,
David S. Miller
davem@redhat.com

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