linux-kernel - Re: [git pull] x86 PAT changes

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Date:	Fri, 25 Apr 2008 16:43:59 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [git pull] x86 PAT changes



On Fri, 25 Apr 2008, Ingo Molnar wrote:
> Linus, please pull the x86-pat git tree from:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat.git for-linus
> 
> this adds the second (and final) phase of the x86 PAT changes. Due to 
> generic impact (the drivers/char/mem.c and include/asm-generic/iomap.h 
> changes) this is offered as a separate tree.

So why is PAT dependent on NONPROMISC_DEVMEM here?

It seems pointless and wrong. Somebody might want to have both the full 
/dev/mem and PAT.

Also, it causes this message for me on one of my machines:

	EXT3-fs: mounted filesystem with ordered data mode.
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	mtrr: no more MTRRs available
	Overlap at 0xd0000000-0xe0000000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0380000
	EXT3 FS on dm-0, internal journal
	...
	eth0: no IPv6 routers present
	Overlap at 0xd0000000-0xe0000000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0380000
	Overlap at 0xd0000000-0xe0000000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0380000
	Overlap at 0xd0000000-0xe0000000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0380000
	Overlap at 0xd0000000-0xe0000000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0380000
	Overlap at 0xd0000000-0xe0000000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0380000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xd0000000-0xd0020000
	mtrr: no more MTRRs available
	Overlap at 0xd0000000-0xe0000000
	Overlap at 0xe0300000-0xe0400000
	Overlap at 0xe0300000-0xe0380000

which is a bit annoying. Forgotten debug printk, perhaps?

			Linus
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