linux-kernel - Re: [PATCH 1/2] x86: mtrr cleanup for converting continuous to discrete layout v7

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Message-ID: <4816EEA1.6050804@googlemail.com>
Date:	Tue, 29 Apr 2008 11:47:13 +0200
From:	Gabriel C <nix.or.die@...glemail.com>
To:	yhlu.kernel@...il.com
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Mika Fischer <mika.fischer@...pnet.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] x86: mtrr cleanup for converting continuous to discrete
 layout v7

Yinghai Lu wrote:
> some BIOS like to use continus MTRR layout, and may X driver can not add
> WB entries for graphical cards when 4g or more RAM installed.
> 
> the patch will change MTRR to discrete.
> 
> mtrr_chunk_size= could be used to have smaller continuous block to hold holes.
> default is 256m, could be set according to size of graphics card memory.
> 
> v2: fix -1 for UC checking
> v3: default to disable, and need use enable_mtrr_cleanup to enable this feature
>     skip the var state change warning.
>     remove next_basek in range_to_mtrr()
> v4: correct warning mask.
> v5: CONFIG_MTRR_SANITIZER
> v6: fix 1g, 2g, 512 aligment with extra hole
> v7: gran_sizek to prevent running out of MTRRs.
> 

With this version ( and patch http://lkml.org/lkml/2008/4/29/97 ) applyed on latest linus git tree
the box OOPS'es early.

Sorry I don't have time right now to write down the part of the OOPS I can see on monitor , I can try to find
some time later.

In any way OOPS'es on __free_one_page+0x191/0x21e


Gabriel
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