From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Andrew Morton" <akpm@linux-foundation.org>
Cc: "Bob Tracy" <rct@gherkin.frus.com>, linux-kernel@vger.kernel.org
Subject: Re: [BUG] /proc/mtrr I/O error
Date: Tue, 2 Sep 2008 16:08:00 -0700 [thread overview]
Message-ID: <86802c440809021608s54725294t5629255bb1f0c9@mail.gmail.com> (raw)
In-Reply-To: <20080902154620.314ad5c2.akpm@linux-foundation.org>
On Tue, Sep 2, 2008 at 3:46 PM, Andrew Morton <akpm@linux-foundation.org> wrote:
> On Fri, 29 Aug 2008 16:38:24 -0500
> Bob Tracy <rct@gherkin.frus.com> wrote:
>
>> With 2.6.27-rc4 and possibly earlier kernels, I see the following:
>>
>> $ cat /proc/mtrr
>> cat: /proc/mtrr: Input/output error
>>
>> Processor is an AMD K6-III/450.
>>
>
> static int mtrr_open(struct inode *inode, struct file *file)
> {
> if (!mtrr_if)
> return -EIO;
>
>
>
> Beats me. Perhaps something broke in mtrr_bp_init().
>
> It would be useful to know if 2.6.26 worked OK.
>
two patches needed..
http://lkml.org/lkml/2008/9/1/307
[PATCH 4/6] x86: delay early cpu initialization until cpuid is done
http://lkml.org/lkml/2008/9/1/308
[PATCH 5/6] x86: move mtrr cpu cap setting early in early_init_xxxx
YH
next prev parent reply other threads:[~2008-09-02 23:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-29 21:38 Bob Tracy
2008-09-02 22:46 ` Andrew Morton
2008-09-02 23:08 ` Yinghai Lu [this message]
2008-09-03 3:58 ` Bob Tracy
2008-09-03 4:56 ` Yinghai Lu
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