linux-kernel - Re: 2.6.39-rc5-git2 boot crashs

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Message-ID: <BANLkTi=6_oXX1BM5O3kJ6bVevh9=ydjj3g@mail.gmail.com>
Date:	Tue, 3 May 2011 13:17:36 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	werner <w.landgraf@...ru>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.39-rc5-git2 boot crashs

On Tue, May 3, 2011 at 12:08 PM, Ingo Molnar <mingo@...e.hu> wrote:
>
> I have no smart ideas straight away - just an observation: i keep testing
> CONFIG_X86_ELAN=y on real hardware, and it's enabled in about 4% of my configs:

So how often do you do more than just boot?

Because this problem doesn't happen at boot-time, the "bad IO" issue
seems to happen only after some real filesystem work (ie the "unzip a
140MB file" etc). In one of the logs, the SATA driver issue ended up
happening four hours after boot (but I think Werner could trigger it
in minutes by doing heavy FS work).

That's why I'd suspect some subtle race or other and/or memory
allocation re-use.

The subject line "boot crashs" is misleading, because that's the
unrelated logfs thing that I have a tentative patch for.

That said, I don't really see why ELAN would be so special.

Werner: can you test without X86_EXTENDED_PLATFORM, but then picking
the i486 config instead? That should approximate the ELAN
configuration pretty closely, at least in things like compiler flags..

                   Linus
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