On 2014-07-04 08:08, Wanpeng Li wrote: > On Fri, Jul 04, 2014 at 07:43:14AM +0200, Jan Kiszka wrote: >> On 2014-07-04 04:52, Wanpeng Li wrote: >>> On Thu, Jul 03, 2014 at 01:27:05PM -0400, Bandan Das wrote: >>> [...] >>>> # modprobe kvm_intel ept=0 nested=1 enable_shadow_vmcs=0 >>>> >>>> The Host CPU - Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz >>>> qemu cmd to run L1 - >>>> # qemu-system-x86_64 -drive file=level1.img,if=virtio,id=disk0,format=raw,cache=none,werror=stop,rerror=stop,aio=threads -drive file=level2.img,if=virtio,id=disk1,format=raw,cache=none,werror=stop,rerror=stop,aio=threads -vnc :2 --enable-kvm -monitor stdio -m 4G -net nic,macaddr=00:23:32:45:89:10 -net tap,ifname=tap0,script=/etc/qemu-ifup,downscript=no -smp 4 -cpu Nehalem,+vmx -serial pty >>>> >>>> qemu cmd to run L2 - >>>> # sudo qemu-system-x86_64 -hda VM/level2.img -vnc :0 --enable-kvm -monitor stdio -m 2G -smp 2 -cpu Nehalem -redir tcp:5555::22 >>>> >>>> Additionally, >>>> L0 is FC19 with 3.16-rc3 >>>> L1 and L2 are Ubuntu 14.04 with 3.13.0-24-generic >>>> >>>> Then start a kernel compilation inside L2 with "make -j3" >>>> >>>> There's no call trace on L0, both L0 and L1 are hung (or rather really slow) and >>>> L1 serial spews out CPU softlock up errors. Enabling panic on softlockup on L1 will give >>>> a trace with smp_call_function_many() I think the corresponding code in kernel/smp.c that >>>> triggers this is >>>> >>>> WARN_ON_ONCE(cpu_online(this_cpu) && irqs_disabled() >>>> && !oops_in_progress && !early_boot_irqs_disabled); >>>> >>>> I know in most cases this is usually harmless, but in this specific case, >>>> it seems it's stuck here forever. >>>> >>>> Sorry, I don't have a L1 call trace handy atm, I can post that if you are interested. >>>> >>>> Note that this can take as much as 30 to 40 minutes to appear but once it does, >>>> you will know because both L1 and L2 will be stuck with the serial messages as I mentioned >>>> before. From my side, let me try this on another system to rule out any machine specific >>>> weirdness going on.. >>>> >>> >>> Thanks for your pointing out. >>> >>>> Please let me know if you need any further information. >>>> >>> >>> I just run kvm-unit-tests w/ vmx.flat and eventinj.flat. >>> >>> >>> w/ vmx.flat and w/o my patch applied >>> >>> [...] >>> >>> Test suite : interrupt >>> FAIL: direct interrupt while running guest >>> PASS: intercepted interrupt while running guest >>> FAIL: direct interrupt + hlt >>> FAIL: intercepted interrupt + hlt >>> FAIL: direct interrupt + activity state hlt >>> FAIL: intercepted interrupt + activity state hlt >>> PASS: running a guest with interrupt acknowledgement set >>> SUMMARY: 69 tests, 6 failures >>> >>> w/ vmx.flat and w/ my patch applied >>> >>> [...] >>> >>> Test suite : interrupt >>> PASS: direct interrupt while running guest >>> PASS: intercepted interrupt while running guest >>> PASS: direct interrupt + hlt >>> FAIL: intercepted interrupt + hlt >>> PASS: direct interrupt + activity state hlt >>> PASS: intercepted interrupt + activity state hlt >>> PASS: running a guest with interrupt acknowledgement set >>> >>> SUMMARY: 69 tests, 2 failures >> >> Which version (hash) of kvm-unit-tests are you using? All tests up to >> 307621765a are running fine here, but since a0e30e712d not much is >> completing successfully anymore: >> > > I just git pull my kvm-unit-tests to latest, the last commit is daeec9795d. > >> enabling apic >> paging enabled >> cr0 = 80010011 >> cr3 = 7fff000 >> cr4 = 20 >> PASS: test vmxon with FEATURE_CONTROL cleared >> PASS: test vmxon without FEATURE_CONTROL lock >> PASS: test enable VMX in FEATURE_CONTROL >> PASS: test FEATURE_CONTROL lock bit >> PASS: test vmxon >> FAIL: test vmptrld >> PASS: test vmclear >> init_vmcs : make_vmcs_current error >> FAIL: test vmptrst >> init_vmcs : make_vmcs_current error >> vmx_run : vmlaunch failed. >> FAIL: test vmlaunch >> FAIL: test vmlaunch >> >> SUMMARY: 10 tests, 4 unexpected failures > > > /opt/qemu/bin/qemu-system-x86_64 -enable-kvm -device pc-testdev -serial stdio > -device isa-debug-exit,iobase=0xf4,iosize=0x4 -kernel ./x86/vmx.flat -cpu host > > Test suite : interrupt > PASS: direct interrupt while running guest > PASS: intercepted interrupt while running guest > PASS: direct interrupt + hlt > FAIL: intercepted interrupt + hlt > PASS: direct interrupt + activity state hlt > PASS: intercepted interrupt + activity state hlt > PASS: running a guest with interrupt acknowledgement set > > SUMMARY: 69 tests, 2 failures Somehow I'm missing the other 31 vmx test we have now... Could you post the full log? Please also post the output of qemu/scripts/kvm/vmxcap on your test host to compare with what I have here. Thanks, Jan -- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
