From: Ingo Molnar <mingo@elte.hu>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: hpa@zytor.com, tglx@linutronix.de, torvalds@linux-foundation.org,
yinghai@kernel.org, venkatesh.pallipadi@intel.com,
akpm@linux-foundation.org, arjan@infradead.org,
linux-kernel@vger.kernel.org, jaswinderlinux@gmail.com,
just.for.lkml@googlemail.com, npiggin@suse.de
Subject: Re: [patch] x86: fix page attribute corruption with cpa()
Date: Wed, 21 Jan 2009 12:25:30 +0100 [thread overview]
Message-ID: <20090121112530.GD23469@elte.hu> (raw)
In-Reply-To: <20090120222021.GB28352@linux-os.sc.intel.com>
* Suresh Siddha <suresh.b.siddha@intel.com> 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
next prev parent reply other threads:[~2009-01-21 11:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-20 22:20 [patch] x86: fix page attribute corruption with cpa() Suresh Siddha
2009-01-21 11:25 ` Ingo Molnar [this message]
2009-01-21 13:20 ` Nick Piggin
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