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SubjectRe: RFC: remove __read_mostly
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From: Adrian Bunk <bunk@kernel.org>
Date: Thu, 13 Dec 2007 23:20:44 +0100

> My question is:
> Is there anywhere in the kernel a case where __read_mostly brings a
> measurable improvement or can it be removed?

Yes, on SMP when read-mostly objects share cache lines
with other objects which are frequently written to.

That is the whole reason we created __read_mostly


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