From: Mika Fischer <mika.fischer@zoopnet.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>,
yhlu.kernel@gmail.com, Andrew Morton <akpm@linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Gabriel C <nix.or.die@googlemail.com>
Subject: Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v2
Date: Mon, 28 Apr 2008 17:28:21 +0200 [thread overview]
Message-ID: <4815ED15.3080702@zoopnet.de> (raw)
In-Reply-To: <20080428064925.318659b9@laptopd505.fenrus.org>
Arjan van de Ven schrieb:
> yep one should not touch existing MTRRs. If you run out, tough luck.
> Thats what we have PAT for.
> Changing them anyway is a deathtrap with various things, suspend/resume being only
> one of the nasty cases.
Hm. I currently have to remove the offending (i.e. overlapping my video
memory) MTRRs and split them so that they have a hole where my video
memory is.
Only that makes the X server happy, which wants to set up a
write-combining range covering the video memory.
Is there a better workaround?
>> how relevant is this feature with modern Xorg? I thought modern Xorg
>> would get its mappings via /sys, hence it would not have to touch
>> MTRRs at all.
>
> that's true for current X, but not for 6 month old X :=(
Ah, so the new X will be able to use the video memory in write-combining
mode even if I have an MTRR saying this area is uncachable or write-back?
If that is the case, then I agree that this patch is not really needed.
Regards,
Mika
next prev parent reply other threads:[~2008-04-28 15:28 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-28 6:37 [PATCH] x86: mtrr cleanup for converting continuous to discrete layout Yinghai Lu
2008-04-28 9:06 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v2 Yinghai Lu
2008-04-28 13:08 ` Ingo Molnar
2008-04-28 13:49 ` Arjan van de Ven
2008-04-28 15:28 ` Mika Fischer [this message]
2008-04-28 5:50 ` Arjan van de Ven
2008-04-28 16:01 ` Gabriel C
2008-04-28 16:28 ` Mika Fischer
2008-04-28 19:44 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v3 Yinghai Lu
2008-04-28 20:15 ` Ingo Molnar
2008-04-28 20:18 ` Yinghai Lu
2008-04-28 20:29 ` Ingo Molnar
2008-04-28 20:16 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v4 Yinghai Lu
2008-04-28 22:05 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v5 Yinghai Lu
2008-04-28 22:36 ` Randy Dunlap
2008-04-28 22:47 ` Yinghai Lu
2008-04-29 2:42 ` Andrew Morton
2008-04-29 3:01 ` Yinghai Lu
[not found] ` <200804290157.30651.yhlu.kernel@gmail.com>
2008-04-29 8:59 ` [PATCH 2/2] x86: fix trimming e820 with MTRR holes Yinghai Lu
2008-04-29 11:35 ` Ingo Molnar
2008-04-29 17:18 ` Yinghai Lu
2008-04-29 17:20 ` Yinghai Lu
2008-04-30 3:25 ` [PATCH] x86: fix trimming e820 with MTRR holes. - fix Yinghai Lu
2008-04-30 12:09 ` Ingo Molnar
2008-04-29 9:00 ` [PATCH 1/2] x86: mtrr cleanup for converting continuous to discrete layout v7 Yinghai Lu
2008-04-29 9:47 ` Gabriel C
2008-04-29 10:30 ` Yinghai Lu
2008-04-29 10:56 ` Yinghai Lu
2008-04-29 11:26 ` Ingo Molnar
2008-04-29 11:51 ` Gabriel C
2008-04-29 17:11 ` Yinghai Lu
2008-04-29 20:25 ` Gabriel C
2008-04-29 21:49 ` Yinghai Lu
2008-04-29 23:56 ` Gabriel C
2008-04-30 0:06 ` Gabriel C
2008-04-30 0:38 ` Yinghai Lu
2008-04-30 1:02 ` Gabriel C
2008-04-30 3:00 ` Yinghai Lu
2008-04-30 3:29 ` Yinghai Lu
2008-04-30 4:12 ` Gabriel C
2008-04-30 4:25 ` Yinghai Lu
2008-04-30 12:04 ` Gabriel C
2008-04-30 16:26 ` Yinghai Lu
2008-04-30 0:13 ` Yinghai Lu
2008-04-29 10:52 ` [PATCH 1/2] x86: mtrr cleanup for converting continuous to discrete layout v8 Yinghai Lu
2008-04-29 13:07 ` Ingo Molnar
2008-04-29 17:25 ` Yinghai Lu
2008-04-29 20:46 ` Randy Dunlap
2008-04-29 21:54 ` Yinghai Lu
2008-04-30 3:25 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v8 - fix Yinghai Lu
2008-04-30 12:09 ` Ingo Molnar
2008-05-01 8:00 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect Yinghai Lu
2008-05-01 11:45 ` Gabriel C
2008-05-02 0:06 ` Yinghai Lu
2008-05-02 0:29 ` Gabriel C
2008-05-02 0:35 ` Yinghai Lu
2008-05-02 1:18 ` Gabriel C
2008-05-02 1:55 ` Yinghai Lu
2008-05-01 12:09 ` Mika Fischer
2008-05-01 16:35 ` Yinghai Lu
2008-05-01 16:59 ` Mika Fischer
2008-05-01 17:40 ` Yinghai Lu
2008-05-01 15:09 ` Randy Dunlap
2008-05-01 16:38 ` Yinghai Lu
2008-05-01 18:57 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect v2 Yinghai Lu
2008-05-01 19:42 ` H. Peter Anvin
2008-05-01 21:02 ` Yinghai Lu
2008-05-01 21:10 ` H. Peter Anvin
2008-05-01 21:20 ` Yinghai Lu
2008-05-01 21:26 ` H. Peter Anvin
2008-05-01 21:31 ` Yinghai Lu
2008-05-01 21:33 ` H. Peter Anvin
2008-05-01 21:44 ` Yinghai Lu
2008-05-01 21:49 ` H. Peter Anvin
2008-05-01 22:52 ` Yinghai Lu
2008-05-01 22:57 ` H. Peter Anvin
2008-05-01 23:10 ` Yinghai Lu
2008-05-02 0:52 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect v3 Yinghai Lu
2008-05-02 9:40 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect v4 Yinghai Lu
2008-04-29 19:00 ` [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v5 Eric W. Biederman
2008-04-29 20:04 ` Yinghai Lu
2008-04-29 20:29 ` Eric W. Biederman
2008-04-29 21:57 ` Yinghai Lu
2008-04-29 22:09 ` Ingo Molnar
2008-04-29 22:18 ` Yinghai Lu
2008-04-29 22:14 ` Eric W. Biederman
2008-04-29 22:54 ` Thomas Gleixner
2008-04-30 1:16 ` Eric W. Biederman
2008-04-30 9:57 ` Alan Cox
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