linux-kernel - Re: Fwd: [PATCH] x86: Use larger chunks in mtrr

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Message-ID: <55F6DDDF.70909@gmail.com>
Date:	Mon, 14 Sep 2015 09:46:55 -0500
From:	Stuart Hayes <stuart.w.hayes@...il.com>
To:	Prarit Bhargava <prarit@...hat.com>,
	"Luis R. Rodriguez" <mcgrof@...e.com>
Cc:	tglx@...utronix.de, mingo@...hat.com,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	x86@...nel.org, mcgrof@...not-panic.com,
	Toshi Kani <toshi.kani@...com>
Subject: Re: Fwd: [PATCH] x86: Use larger chunks in mtrr_cleanup


>>
>> Linux drivers no longer use MTRR so why is the cleanup needed, ie, what would
>> happen if the cleanup is just skipped in your case ?
> 
> The infiniband & video drivers still use MTRR (or at least it was my
> understanding that they do).  In any case, Stuart -- could you try booting with
> 'disable_mtrr_cleanup' as a kernel parameter?
> 
> P.
> 

Sorry for the delayed response.

Booting with 'disable_mtrr_cleanup' works, but the system I am working with
isn't actually failing--it just gets ugly error messages.  And the BIOS on the
system I am working with had set up the MTRRs correctly.

Stuart
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