From: ebiederm@xmission.com (Eric W. Biederman)
To: "Brian C. Thomas" <bcthomas@nature.Berkeley.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: severe performance degradation on serverworks with high mem
Date: 19 Oct 2001 01:24:09 -0600 [thread overview]
Message-ID: <m1sncgnld2.fsf@frodo.biederman.org> (raw)
In-Reply-To: <20011018125714.A360@nature.Berkeley.edu> <20011018144504.B134@nature.Berkeley.edu>
In-Reply-To: <20011018144504.B134@nature.Berkeley.edu>
"Brian C. Thomas" <bcthomas@nature.Berkeley.edu> writes:
> Hi
>
> I don't know if this helps, but I seem to have stumbled onto a
> possible "fix" for this...
>
> With 64GB high memory enabled in kernel 2.4.12-ac3, and mtrr turned
> on, I was able to see all 8GB RAM on my machine by using the old
> 'append="mem=8000M"' command in my lilo.conf file... AND WITH NO LOSS
> OF PERFORMANCE!
>
> Does that help anyone with defining where this problem is coming from?
cat /proc/mtrr and see what the mtrrs look like. It feels like there you
have a spot of RAM the BIOS doesn't cover with mtrrs.
Eric
prev parent reply other threads:[~2001-10-19 7:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-18 19:57 severe performance degradation on serverworks with high mem Brian C. Thomas
2001-10-18 21:45 ` Brian C. Thomas
2001-10-18 23:01 ` Mike Fedyk
2001-10-19 7:24 ` Eric W. Biederman [this message]
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