From: "Brian D. McGrew" <brian@visionpro.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: Memset very slow
Date: Thu, 03 Feb 2011 13:58:08 -0800 [thread overview]
Message-ID: <C97064F0.479C8%brian@visionpro.com> (raw)
In-Reply-To: <20110203213158.62baa54c@lxorguk.ukuu.org.uk>
On 2/3/11 1:31 PM, "Alan Cox" <alan@lxorguk.ukuu.org.uk> wrote:
>> So, my question is, can someone explain to me what is going on here? I am
>> not convinced this is a kernel problem just because a new kernel fixed it;
>> but, if there were changes related to this in the kernel, then what is the
>> oldest version I should be looking at to fix my issues?
>
> The newer kernel does several things that may be relevant - the obvious
> one is that it rewrites and corrects MTRR data if it doesn't like what
> the BIOS handed out. That would fit with dramatic slowdowns in memory
> performance being fixed.
The Dell precsion-linux mailing list almost immediately pointed me here:
https://bugzilla.redhat.com/show_bug.cgi?id=581933
Which seems like it is my problem and the fix seems to work for me.
-brian
next prev parent reply other threads:[~2011-02-03 21:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-03 19:43 Memset very slow Brian D. McGrew
2011-02-03 21:31 ` Alan Cox
2011-02-03 21:58 ` Brian D. McGrew [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-02-03 21:30 Xose Vazquez Perez
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