Re: [PATCH][2.6-mm] Fix 4G/4G X11/vm86 oops

[Matt Mackall <mpm@selenic.com>]

On Wed, Nov 19, 2003 at 02:32:10PM -0600, Matt Mackall wrote:
> 
> Zwane's got a K6-2 500MHz. I've just managed to reproduce this on my
> 1.4GHz Opteron box (with Debian gcc 3.2). Here, the "ooh la la" bit
> doesn't help. So my suspicion is that the printk is changing the
> timing just enough on Zwane's box that he's getting a timer interrupt
> knocking him out of vm86 mode before he hits a fatal bit in the fault
> handling path for 4/4. Printks in handle_vm86_trap, handle_vm86_fault,
> do_trap:vm86_trap, and do_general_protection:gp_in_vm86 never fire so
> there's probably something amiss in the trampoline code.

Some more datapoints:

CPU          distro          compiler  video        X     result
K6-2/500     connectiva 9    2.96      trident      4.3   reboot (zwane)
K6-2/500     connectiva 9    3.2.2     trident      4.3   reboot (zwane)
Opteron 240  debian unstable 3.2       S3           4.2.1 reboot
Athlon 2100  debian unstable 3.2       radeon 7500  4.2.1 works
P4M 1800     debian unstable 3.2       radeon m7    4.2.1 reboot

-- 
Matt Mackall : http://www.selenic.com : Linux development and consulting
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