Re: Problem with booting 2.6.32.16 pvops DomU

[Jeremy Fitzhardinge <jeremy@goop.org>]

On 07/08/2010 02:51 AM, GiovanniB wrote:
> Hello
>
> same problem here.
>
> Supermicro Board
> XEON E5506
>
> xm dmesg:
> (XEN) traps.c:2230:d11 Domain attempted WRMSR 000000000000008b from
> 00000011:00000000 to 00000000:00000000.
> (XEN) traps.c:2230:d11 Domain attempted WRMSR 000000000000008b from
> 00000011:00000000 to 00000000:00000000.
> (XEN) traps.c:2230:d11 Domain attempted WRMSR 000000000000008b from
> 00000011:00000000 to 00000000:00000000.
> (XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
> 00000011:00000000 to 00000000:00000000.
> (XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
> 00000011:00000000 to 00000000:00000000.
> (XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
> 00000011:00000000 to 00000000:00000000.
> (XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
> 00000011:00000000 to 00000000:00000000
>
>
> domU hangs here with 400% CPU load (4 vcpus)
> (same problem with 1 vcpu)
>
> ...
> [    1.807477] kjournald starting.  Commit interval 5 seconds
> [    2.005607] EXT3 FS on xvda1, internal journal
> [    2.005618] EXT3-fs: recovery complete.
> [    2.005626] EXT3-fs: mounted filesystem with writeback data mode.
> [    2.005643] VFS: Mounted root (ext3 filesystem) on device 202:1.
> [    2.005727] Freeing unused kernel memory: 580k freed
> [    2.005892] Write protecting the kernel read-only data: 8160k
>
> here it hangs
>
> 2.6.32.15 there is no problem. I have used the same .config for 2.6.32.16.
>
> I have recompiled it with no energy save option, same error.
> C1 and else are disabled in BIOS.
>   

Does this patch help?

Thanks,
    J

 arch/x86/include/asm/cmpxchg_64.h |   16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/cmpxchg_64.h b/arch/x86/include/asm/cmpxchg_64.h
index 485ae41..70ac0a4 100644
--- a/arch/x86/include/asm/cmpxchg_64.h
+++ b/arch/x86/include/asm/cmpxchg_64.h
@@ -26,26 +26,26 @@ extern void __cmpxchg_wrong_size(void);
 	switch (size) {							\
 	case 1:								\
 		asm volatile("xchgb %b0,%1"				\
-			     : "=q" (__x)				\
-			     : "m" (*__xg(ptr)), "0" (__x)		\
+			     : "=q" (__x), "+m" (*__xg(ptr))		\
+			     : "0" (__x)				\
 			     : "memory");				\
 		break;							\
 	case 2:								\
 		asm volatile("xchgw %w0,%1"				\
-			     : "=r" (__x)				\
-			     : "m" (*__xg(ptr)), "0" (__x)		\
+			     : "=r" (__x), "+m" (*__xg(ptr))		\
+			     : "0" (__x)				\
 			     : "memory");				\
 		break;							\
 	case 4:								\
 		asm volatile("xchgl %k0,%1"				\
-			     : "=r" (__x)				\
-			     : "m" (*__xg(ptr)), "0" (__x)		\
+			     : "=r" (__x), "+m" (*__xg(ptr))		\
+			     : "0" (__x)				\
 			     : "memory");				\
 		break;							\
 	case 8:								\
 		asm volatile("xchgq %0,%1"				\
-			     : "=r" (__x)				\
-			     : "m" (*__xg(ptr)), "0" (__x)		\
+			     : "=r" (__x), "+m" (*__xg(ptr))		\
+			     : "0" (__x)				\
 			     : "memory");				\
 		break;							\
 	default:							\