linux-kernel - Re: Fwd: Fwd: laptop / computer hardlocks during execution of 32bit applications(binaries) on 64bit system (Gentoo)

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Date:	Thu, 10 Jan 2008 16:35:14 -0700
From:	Zan Lynx <zlynx@....org>
To:	Matthew <jackdachef@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Fwd: Fwd: laptop / computer hardlocks during execution of
	32bit applications(binaries) on 64bit system (Gentoo)


On Thu, 2008-01-10 at 13:43 +0100, Matthew wrote:

> it's a little tricky to reproduce it:
> I tried it with root-account: firefox-bin, thunderbird-bin wouldn't trigger
> user-account (with used account-directory of both apps):
> thunderbird-bin triggers it more reliably
> probably it has to do with the x86 compatibility apps of gentoo ?
> gentoo amd64-users with 32bit firefox & thunderbird - anyone able to
> reproduce it ?

I believe that I *have* seen this happen to me.  I'm using a Compaq
R3000 laptop with AMD-64 CPU and Gentoo with kernel 2.6.24-rc6-mm1.

A few days ago I crashed it twice in a row by trying to load my Comics
bookmarks as tabs (87 entries) in 32-bit Firefox.

I only got 1 and 3/4ths lines output by netconsole and it mentioned a
function with 32-something in the name.

Later tonight I can try loading the tabs in Firefox again to see if it
will reproduce for a 3rd time.

I also have to say that the NMI watchdog, supposedly Non-Maskable,
hardly *ever* works for me.  I don't believe that whatever events reset
the dog actually matter to the end user.  Perhaps its still processing
interrupts and running a timer loop but if nothing can read or write
disk, net, netlink or other device IO, I don't believe the system can
actually claim to be working.
-- 
Zan Lynx <zlynx@....org>

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