Re: [patch] x86: fix page attribute corruption with cpa()

[Nick Piggin]

On Tue, Jan 20, 2009 at 02:20:21PM -0800, Suresh B wrote:
> This patch fixes a performance issue reported by Linus on his
> Nehalem system. While Linus reverted the PAT patch (commit
> 58dab916dfb57328d50deb0aa9b3fc92efa248ff) which exposed the issue,
> existing cpa() code can potentially still cause wrong(page attribute
> corruption) behavior.
> 
> This patch also fixes the "WARNING: at arch/x86/mm/pageattr.c:560" that
> various people reported.

This doesn't seem to show up any more after running the system for
some time, so I think it's fixed here. Thanks!

> 
> ---
> From: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
> Subject: x86: fix page attribute corruption with cpa()

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