Re: qemu-kvm.git build problem

[Jan Kiszka <jan.kiszka@siemens.com>]

Lucas Meneghel Rodrigues wrote:
> On Mon, 2009-12-28 at 16:40 -0200, Lucas Meneghel Rodrigues wrote:
>> Hi, we've had a problem on today's git testing when trying to build from
>> latest upstream qemu-kvm.git repo:
>>
>> 12/28 13:39:18 DEBUG|     utils:0069| Running 'make -j 2'
>> 12/28 13:39:18 DEBUG|     utils:0101| [stdout] make -C /lib/modules/2.6.31.6-166.fc12.x86_64/build M=`pwd` \
>> 12/28 13:39:18 DEBUG|     utils:0101| [stdout] 		LINUXINCLUDE="-I`pwd`/include -Iinclude \
>> 12/28 13:39:18 DEBUG|     utils:0101| [stdout] 		 -Iarch/x86/include -I`pwd`/include-compat -I`pwd`/x86 \
>> 12/28 13:39:18 DEBUG|     utils:0101| [stdout] 		-include include/linux/autoconf.h \
>> 12/28 13:39:18 DEBUG|     utils:0101| [stdout] 		-include `pwd`/x86/external-module-compat.h" \
>> 12/28 13:39:18 DEBUG|     utils:0101| [stdout] 		"$@"
>> 12/28 13:39:18 DEBUG|     utils:0101| [stdout] make[1]: Entering directory `/usr/src/kernels/2.6.31.6-166.fc12.x86_64'
>> 12/28 13:39:19 DEBUG|     utils:0101| [stdout]   LD      /usr/local/autotest/tests/kvm/src/kvm_kmod/x86/built-in.o
>> 12/28 13:39:19 DEBUG|     utils:0101| [stdout]   CC [M]  /usr/local/autotest/tests/kvm/src/kvm_kmod/x86/svm.o
>> 12/28 13:39:19 DEBUG|     utils:0101| [stdout]   CC [M]  /usr/local/autotest/tests/kvm/src/kvm_kmod/x86/vmx.o
>> 12/28 13:39:22 ERROR|     utils:0101| [stderr] /usr/local/autotest/tests/kvm/src/kvm_kmod/x86/vmx.c:271: error: ‘MSR_TSC_AUX’ undeclared here (not in a function)
>> 12/28 13:39:22 ERROR|     utils:0101| [stderr] /usr/local/autotest/tests/kvm/src/kvm_kmod/x86/vmx.c: In function ‘setup_msrs’:
>> 12/28 13:39:22 ERROR|     utils:0101| [stderr] /usr/local/autotest/tests/kvm/src/kvm_kmod/x86/vmx.c:985: warning: passing argument 2 of ‘__find_msr_index’ makes integer from pointer without a cast
>> 12/28 13:39:22 ERROR|     utils:0101| [stderr] /usr/local/autotest/tests/kvm/src/kvm_kmod/x86/vmx.c:424: note: expected ‘u32’ but argument is of type ‘const u32 *’
>> 12/28 13:39:22 ERROR|     utils:0101| [stderr] make[3]: *** [/usr/local/autotest/tests/kvm/src/kvm_kmod/x86/vmx.o] Error 1
>> 12/28 13:39:22 ERROR|     utils:0101| [stderr] make[3]: *** Waiting for unfinished jobs....
>> 12/28 13:39:23 ERROR|     utils:0101| [stderr] make[2]: *** [/usr/local/autotest/tests/kvm/src/kvm_kmod/x86] Error 2
>> 12/28 13:39:23 DEBUG|     utils:0101| [stdout] make[1]: Leaving directory `/usr/src/kernels/2.6.31.6-166.fc12.x86_64'
>> 12/28 13:39:23 ERROR|     utils:0101| [stderr] make[1]: *** [_module_/usr/local/autotest/tests/kvm/src/kvm_kmod] Error 2
>> 12/28 13:39:23 ERROR|     utils:0101| [stderr] make: *** [all] Error 2
>>
>> This might be a problem on kvm-kmod, I am just making sure you guys are aware of this.
> 
> Hi folks, as of today this build problem hasn't been fixed (just a
> friendly reminder).
> 

I'm aware of the issues, already fixed some of them, but were unable to
fully test during vacation + the KVM tree moved on. Hope I'll find some
time to push a complete solution the next days.

BTW, does anybody know how to back-port synchronize_srcu_expedited best?
It looked like a simple mapping to synchronize_srcu was not sufficient
to achieve the same performance as with the pre-srcu locking (e.g.
guest&host stalled during guest's framebuffer setup).

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux