linux-kernel - Re: Linux 2.6.35.2

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Message-Id: <201008141939.54277.edt@aei.ca>
Date:	Sat, 14 Aug 2010 19:39:53 -0400
From:	Ed Tomlinson <edt@....ca>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	sedat.dilek@...il.com, Greg KH <gregkh@...e.de>,
	LKML <linux-kernel@...r.kernel.org>, penberg@...nel.org,
	arthur@....ro, wylda@...ny.cz
Subject: Re: Linux 2.6.35.2

On Saturday 14 August 2010 17:56:58 Linus Torvalds wrote:
> On Sat, Aug 14, 2010 at 12:47 PM, Ed Tomlinson <edt@....ca> wrote:
> > On Saturday 14 August 2010 14:47:45 Linus Torvalds wrote:
> >>
> >> Just to verify: you have CONFIG_HIGHPTE enabled on a x86-32 kernel,
> >> right? I'd have expected this to not ever show up anywhere else, and
> >> I'm just verifying that there isn't anything else going on. I'm
> >> appending the commit message, the patch hasn't changed.
> >
> > No.  I have a x86-64 based kernel (amd64).
> 
> Hmm. On x86-64, pte_unmap() is a no-op. So moving it around should not
> matter one whit. We don't even have a debug mode to turn it into some
> kind of "check that we use it properly in an atomic region" which we
> _could_ do.
> 
> Can you send me the messages you saw without that patch? There's
> something odd going on here. I don't like the fact that the patch
> apparently makes a difference for you. It shouldn't.

Linus,

Not to worry - looks like the problems here were due to a bad inode.
I just did not hit it when restarting with the  patch added.  When I
rebuilt the kernel without the patch it hit the fs/inode problem during
boot.  A manual fsck seems to have fixed things.

Ed Tomlinson
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