Re: [Qemu-devel] QEMU FreeBSD 6.1 "npxdna: fpcurthread == curthread" spewage

[Fabrice Bellard <fabrice@bellard.org>]

There is a bug in the FPU virtualization in kqemu which is only visible 
in the kernel virtualization case. I am trying a fix.

Fabrice.

Zach Metzinger wrote:
> Hi-
> 
> I'm using qemu-0.8.1 under FreeBSD 6.1-RELEASE from ports with
> kqemu-1.3.0pre7 (also from ports). The guest OS is Windows XP SP2.
> When I use the -kernel-kqemu flag to qemu, I get the following kernel
> console messages:
> 
> Jun 21 14:04:57 jitter kernel: npxdna: fpcurthread == curthread 5173 times
> Jun 21 14:04:57 jitter kernel: npxdna: fpcurthread == curthread 5174 times
> <...>
> 
> This happens quite a bit (5-10 a second) when using any block device.
> I assume this is because kernel I/O calls are being virtualized and
> are the cause of this.
> 
> When I do not use -kernel-kqemu, I do not get these messages. In both
> cases, Windows appears to work fine.
> 
> This thread:
> http://tinyurl.com/mbm5l
> appears to have some information on why this happens. Has a patch been
> released to fix this bug?
> 
> --- Zach
> 
> 
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