QEMU: npxdna: fpcurthread == curthread 640962 times
Juergen Lock
nox at jelal.kn-bremen.de
Fri Jun 16 20:28:35 UTC 2006
On Fri, Jun 16, 2006 at 08:55:47PM +0200, Juergen Lock wrote:
> In article <ef10de9a0606131730m7ec33522q2b2273eb3d44d603 at mail.gmail.com> you write:
> >I'm getting these messages on the console when I run QEMU with kqemu
> >kernel module:
> >npxdna: fpcurthread == curthread 640957 times
> >npxdna: fpcurthread == curthread 640958 times
> >npxdna: fpcurthread == curthread 640959 times
> >npxdna: fpcurthread == curthread 640960 times
> >npxdna: fpcurthread == curthread 640961 times
> >npxdna: fpcurthread == curthread 640962 times
> >
> >What are these and how do I make them stop?
> >[...]
>
> Ok since the previous thread on this,
> http://lists.freebsd.org/pipermail/freebsd-emulation/2006-May/002081.html
> didnt end with a consensus on how to fix it, I've made a band-aid
> patch that simply disables the message for the kqemu case: (which
> _appears_ to be harmless there, maybe because qemu doesnt seem to
> be using the fpu while calling kqemu)
>
> Index: sys/i386/isa/npx.c
> ===================================================================
> RCS file: /home/ncvs/src/sys/i386/isa/npx.c,v
> retrieving revision 1.162.2.1.2.2
> diff -u -r1.162.2.1.2.2 npx.c
> --- sys/i386/isa/npx.c 30 Apr 2006 05:17:59 -0000 1.162.2.1.2.2
> +++ sys/i386/isa/npx.c 16 Jun 2006 18:03:23 -0000
> @@ -756,6 +756,9 @@
> if (!npx_exists)
> return (0);
> if (PCPU_GET(fpcurthread) == curthread) {
> +#if 1
> + if (strcmp(curthread->td_proc->p_comm, "qemu"))
> +#endif
> printf("npxdna: fpcurthread == curthread %d times\n",
> ++err_count);
> stop_emulating();
>
> Of course I don't ask for something like this be committed, it is just
> for ppl for who the messages cause trouble. Similar patch for amd64
> (untested):
>
> Index: sys/amd64/amd64/trap.c
>[...]
Ooops, that was wrong of course, :) and I forgot about the second place.
Here is a working amd64 patch:
Index: sys/amd64/amd64/fpu.c
===================================================================
RCS file: /home/ncvs/src/sys/amd64/amd64/fpu.c,v
retrieving revision 1.154.2.1
diff -u -r1.154.2.1 fpu.c
--- sys/amd64/amd64/fpu.c 5 Feb 2005 01:02:48 -0000 1.154.2.1
+++ sys/amd64/amd64/fpu.c 16 Jun 2006 18:00:40 -0000
@@ -387,6 +387,9 @@
register_t s;
if (PCPU_GET(fpcurthread) == curthread) {
+#if 1
+ if (strcmp(curthread->td_proc->p_comm, "qemu-system-x86_64"))
+#endif
printf("fpudna: fpcurthread == curthread %d times\n",
++err_count);
stop_emulating();
Index: sys/amd64/amd64/trap.c
===================================================================
RCS file: /home/ncvs/src/sys/amd64/amd64/trap.c,v
retrieving revision 1.279.2.2.4.1
diff -u -r1.279.2.2.4.1 trap.c
--- sys/amd64/amd64/trap.c 1 May 2005 05:38:12 -0000 1.279.2.2.4.1
+++ sys/amd64/amd64/trap.c 16 Jun 2006 18:00:49 -0000
@@ -348,6 +348,9 @@
* registered such use.
*/
if (fpudna()) {
+#if 1
+ if (strcmp(td->td_proc->p_comm, "qemu-system-x86_64"))
+#endif
printf("fpudna in kernel mode!\n");
goto out;
}
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