linux-kernel - Re: [2.6.25-git18 => 2.6.26-rc1-git1] Xorg crash with xf86MapVidMem error

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Message-ID: <20080508213722.GA28372@linux-os.sc.intel.com>
Date:	Thu, 8 May 2008 14:37:22 -0700
From:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
To:	Rufus & Azrael <rufus-azrael@...ericable.fr>
Cc:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Ingo Molnar <mingo@...e.hu>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	Linux-kernel Mailing List <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [2.6.25-git18 => 2.6.26-rc1-git1] Xorg crash with	xf86MapVidMem error

On Thu, May 08, 2008 at 01:08:01PM -0700, Rufus & Azrael wrote:
>    Venki Pallipadi a ecrit :
>    >
>    > Use UC_MINUS in reserve_memtype call with -1, when MTRR lookup fails for
>    any
>    > reason.
>    >
>    > Change the logic in mtrr_type_lookup to just get the type from the start
>    > address. Using start and end adddress is not right/complete as start and
>    > end can be covered by different mtrr (where old code will fail) or
>    > start and end can be in same mtrr, but still have some different
>    > memory type region in between. Using only start is less restrictive and
>    > deterministic.
>    >
>    > Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
>    >
>    > ---
>    >  arch/x86/kernel/cpu/mtrr/generic.c |    7 ++-----
>    >  arch/x86/mm/pat.c                  |    8 +-------
>    >  2 files changed, 3 insertions(+), 12 deletions(-)
>    >
>
>    Hi Venki,
> 
>    Patch applied on 2.6.26-rc1-git5 and all works fine in X server with 
>    CONFIG_X86_PAT=y.
> 
>    See dmesg and mtrr files attached.
> 

Thanks for reporting the problem and testing the fix.
ingo/thomas/hpa: Can you please pick up this patch. Fixes the PAT regression
reported on this thread.

Thanks,
Venki

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