linux-kernel - Re: GIT head no longer boots on x86-64

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Date:	Thu, 16 Oct 2008 03:31:18 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...e.hu>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jiri Slaby <jirislaby@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org, "David S. Miller" <davem@...emloft.net>,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: GIT head no longer boots on x86-64

Linus Torvalds wrote:
> 
> Oh, btw. This patch is *totally* untested. I don't even enable modules. So 
> if it doesn't compile, it isn't perfect. But while it may not _work_, at 
> least it's not _ugly_.
> 
> (Quite frankly, I think an even more correct fix is to rename the whole 
> "vmalloc_to_page()" function, since it's clearly used for other things 
> than vmalloc. Maybe "kernel_virtual_to_page()". Whatever. This is trying 
> to be minimal without being totally disgusting).
> 

I have verified that this patch fixes the problem, at least in my test 
rig, and has queued it up for tip:x86/urgent.  It should be in the next 
pull request.

Note that this bug only bites when CONFIG_DEBUG_VIRTUAL=y and we're 
running an SMP kernel on UP.  Not that that is any excuse.

	-hpa
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