From: Nick Piggin <npiggin@suse.de>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: mingo@elte.hu, 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
Subject: Re: [patch] x86: fix page attribute corruption with cpa()
Date: Wed, 21 Jan 2009 14:20:36 +0100 [thread overview]
Message-ID: <20090121132036.GU24891@wotan.suse.de> (raw)
In-Reply-To: <20090120222021.GB28352@linux-os.sc.intel.com>
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@intel.com>
> Subject: x86: fix page attribute corruption with cpa()
prev parent reply other threads:[~2009-01-21 13:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-20 22:20 Suresh Siddha
2009-01-21 11:25 ` Ingo Molnar
2009-01-21 13:20 ` Nick Piggin [this message]
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