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

[Ingo Molnar]

* Suresh Siddha <suresh.b.siddha@xxxxxxxxx> 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.

nice fix - applied to tip/x86/urgent, thanks Suresh!

	Ingo
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