linux-kernel - Re: [RFC GIT PULL] x86/pat changes for v2.6.34

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Message-ID: <4B8C4CB9.3050901@zytor.com>
Date:	Mon, 01 Mar 2010 15:24:41 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Chris Mason <chris.mason@...cle.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC GIT PULL] x86/pat changes for v2.6.34

On 03/01/2010 10:28 AM, Pallipadi, Venkatesh wrote:
> On Sat, 2010-02-27 at 08:36 -0800, Ingo Molnar wrote:
>> Linus,
>>
>> Please pull the latest x86-pat-for-linus git tree from:
>>
>>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-pat-for-linus
>>
>> Please have a look at the lib/rbtree.c changes. The rebalancing changes ought
>> to not impact performance - rb_erase() possibly in a small way. Should this
>> perhaps be done via a separate API entry, instead of modifying existing rbtree
>> code?
>>
>> out-of-topic modifications in x86-pat-for-linus:
>> ------------------------------------------------
>> include/linux/rbtree.h             # 17d9ddc: rbtree: Add support for augmented
>> lib/rbtree.c                       # 17d9ddc: rbtree: Add support for augmented
>>
> These patches should go in before "Add support for augmented rbtrees":
> 
> "btrfs: use RB_ROOT to intialize rb_trees instead of settingrb_node to
> NULL"
> http://lkml.indiana.edu/hypermail/linux/kernel/1002.2/02946.html
> 
> "[patch 0/3] Fixup rb_root initializations to use RB_ROOT"
> http://lkml.indiana.edu/hypermail/linux/kernel/1002.2/03037.html
> 
> 
> 
> And this is an x86 bug fix on top of "Migrate to rbtree only backend for
> pat memtype management"
> http://lkml.indiana.edu/hypermail/linux/kernel/1002.3/00346.html
> 

I have added that the latter patch to tip:x86/pat; Ingo should hopefully
run it through his test machine overnight and bump x86-pat-for-linus.

I feel a bit uncomfortable with the btrfs patches just because they're
out of my area, but I'm Cc:ing Chris to let him either take the patches
or tell me to shut up and just do it ;)

	-hpa
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