On Mon, 2015-01-12 at 15:06 -0500, Kevin O'Connor wrote:
> On Mon, Jan 12, 2015 at 01:13:54PM -0600, Richard Laager wrote:
> > Your patch implementing idea 6 fixes the problem for my business
> > application on a stock Ubuntu package (with extra stack enabled).
>
> Thanks.
>
> The key part of opt
On Mon, Jan 12, 2015 at 01:13:54PM -0600, Richard Laager wrote:
> Your patch implementing idea 6 fixes the problem for my business
> application on a stock Ubuntu package (with extra stack enabled).
Thanks.
The key part of option 5 (as described in my previous email) looks
like the patch below.
On 12/01/2015 20:36, Kevin O'Connor wrote:
> Okay, so it fakes real-mode by setting up a protected mode guest with
> a fake CR0 that is running vm86, and so SMSW still returns a value
> with PE off? (As opposed to a regular guest that itself launches a
> VM86 instance, in which case CR0 from SMS
On Mon, Jan 12, 2015 at 02:00:24PM -0500, Paolo Bonzini wrote:
> > > No, KVM hides the fact that you are in protected mode. EMM386 would be
> > > affected, but then it is not impossible for old programs to require
> > > disabling it.
> >
> > I was under the vague impression that kvm uses VM86 mod
> > No, KVM hides the fact that you are in protected mode. EMM386 would be
> > affected, but then it is not impossible for old programs to require
> > disabling it.
>
> I was under the vague impression that kvm uses VM86 mode to run 16bit
> code on some Intel chipsets. The SMSW instruction isn'
Your patch implementing idea 6 fixes the problem for my business
application on a stock Ubuntu package (with extra stack enabled).
--
Richard
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On Mon, Jan 12, 2015 at 07:25:58PM +0100, Paolo Bonzini wrote:
> On 12/01/2015 19:19, Kevin O'Connor wrote:
> > I was able to reproduce this locally with 16bit skifree on Windows
> > Vista. (Interestingly, the problem doesn't occur on winxp.)
>
> I put "there is a 16-bit freely downloadable versi
On 12/01/2015 19:19, Kevin O'Connor wrote:
> I was able to reproduce this locally with 16bit skifree on Windows
> Vista. (Interestingly, the problem doesn't occur on winxp.)
I put "there is a 16-bit freely downloadable version of skifree" on my
personal list of trivia that ended up becoming use
On Mon, Jan 12, 2015 at 02:53:58AM -0600, Richard Laager wrote:
> Turning off CONFIG_VGA_ALLOCATE_EXTRA_STACK makes Skifree work on cirrus
> and vga.
I was able to reproduce this locally with 16bit skifree on Windows
Vista. (Interestingly, the problem doesn't occur on winxp.)
The issue doesn't a
On Mon, Jan 12, 2015 at 09:59:49AM -0600, Richard Laager wrote:
> On Mon, 2015-01-12 at 10:32 -0500, Kevin O'Connor wrote:
> > Interesting. Does your original business app then also work with
> > CONFIG_VGA_ALLOCATE_EXTRA_STACK disabled?
>
> Yes. I couldn't be sure if I tested before, since I did
On 12/01/2015 16:59, Richard Laager wrote:
> On Mon, 2015-01-12 at 10:32 -0500, Kevin O'Connor wrote:
>> Interesting. Does your original business app then also work with
>> CONFIG_VGA_ALLOCATE_EXTRA_STACK disabled?
>
> Yes. I couldn't be sure if I tested before, since I didn't write it
> down.
On Mon, 2015-01-12 at 10:32 -0500, Kevin O'Connor wrote:
> Interesting. Does your original business app then also work with
> CONFIG_VGA_ALLOCATE_EXTRA_STACK disabled?
Yes. I couldn't be sure if I tested before, since I didn't write it
down. But I just tested now.
Obviously this extra stack feat
On Mon, Jan 12, 2015 at 02:53:58AM -0600, Richard Laager wrote:
> On Fri, 2015-01-09 at 11:58 -0500, Kevin O'Connor wrote:
> > There are a couple of things you could try to see if it makes any
> > difference - entirely disable debugging in seavgabios
> > (CONFIG_DEBUG_LEVEL=0) in the unlikley case
[I've reordered the quoted text.]
On Fri, 2015-01-09 at 11:58 -0500, Kevin O'Connor wrote:
> Does the crash occur around the time one of the debug messages is
> produced, or is the crash seemingly uncorrelated? I don't see
> anything suspicious in the log.
Sorry, I forgot to note this in my emai
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