diff options
Diffstat (limited to 'results/classifier/105/other/1422285')
| -rw-r--r-- | results/classifier/105/other/1422285 | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/results/classifier/105/other/1422285 b/results/classifier/105/other/1422285 new file mode 100644 index 00000000..72e64266 --- /dev/null +++ b/results/classifier/105/other/1422285 @@ -0,0 +1,120 @@ +other: 0.922 +semantic: 0.896 +mistranslation: 0.895 +assembly: 0.894 +instruction: 0.883 +socket: 0.882 +graphic: 0.878 +device: 0.872 +network: 0.858 +vnc: 0.851 +boot: 0.851 +KVM: 0.821 + +The guest will be destroyed when hot plug the VF to guest for the second time. + +Environment: +------------ +Host OS (ia32/ia32e/IA64):ia32e +Guest OS (ia32/ia32e/IA64):ia32e +Guest OS Type (Linux/Windows):linux +kvm.git Commit: 6557bada461afeaa920a189fae2cff7c8fdce39f +qemu.kvm Commit: cd2d5541271f1934345d8ca42f5fafff1744eee7 +Host Kernel Version:3.19.0-rc3 +Hardware:Haswell_EP,Ivytown_EP + + +Bug detailed description: +-------------------------- +create guest , then hot plug the VF to the guest for the second time, the guest will be destroyed. + +note: +1. hot plug the device to guest with vfio, the guest works fine +2.this should be a qemu bug: +kvm + qemu = result +6557bada + cd2d5541 = bad +6557bada + a805ca54 = good + + +Reproduce steps: +---------------- +1. qemu-system-x86_64 -enable-kvm -m 2G -net none -monitor pty rhel6u5.qcow +2. echo "device_add pci-assign,host=03:10.1,id=nic" >/dev/pts/2 +3. cat /dev/pts/2 & +4. echo "device_del nic" >/dev/pts/2 +5. echo "device_add pci-assign,host=03:10.0,id=nic" >/dev/pts/2 + +Current result: +---------------- +guest will be destroyed when hot plug the vf to guest for the second time. + +Expected result: +---------------- +guest works fine when hot plug the vf to guest for the second time + +Basic root-causing log: +---------------------- +[root@vt-hsw2 cathy]# qemu-system-x86_64 -enable-kvm -m 2G -net none -monitor pty rhel6u5.qcow +char device redirected to /dev/pts/2 (label compat_monitor0) +Segmentation fault (core dumped) + + +some dmesg log: + +pci-stub 0000:03:10.1: kvm deassign device +pci-stub 0000:03:10.1: enabling device (0000 -> 0002) +qemu-system-x86[9894]: segfault at 0 ip (null) sp 00007fa73df0cae8 error 14 +pci-stub 0000:03:10.1: kvm assign device + +the first bad commit is: +commit ec6f25e788ef57ce1e9f734984ef8885172fd9e2 +Merge: 007c99f 9ef1473 +Author: Peter Maydell <email address hidden> +Date: Tue Feb 3 21:37:16 2015 +0000 + + Merge remote-tracking branch 'remotes/rth/tags/pull-tg-s390-20150203' into staging + + s390 translator bug fixes + + # gpg: Signature made Tue 03 Feb 2015 20:39:15 GMT using RSA key ID 4DD0279B + # gpg: Good signature from "Richard Henderson <email address hidden>" + # gpg: aka "Richard Henderson <email address hidden>" + # gpg: aka "Richard Henderson <email address hidden>" + + * remotes/rth/tags/pull-tg-s390-20150203: + target-s390x: fix and optimize slb* and slbg* computation of carry/borrow flag + target-s390x: support OC and NC in the EX instruction + disas/s390.c: Remove unused variables + target-s390x: Mark check_privileged() as !CONFIG_USER_ONLY + target-s390: Implement ECAG + target-s390: Implement LURA, LURAG, STURG + target-s390: Fix STURA + target-s390: Fix STIDP + target-s390: Implement EPSW + target-s390: Implement SAM specification exception + + Signed-off-by: Peter Maydell <email address hidden> + +please ignore comment 1. + +the first bad commit: + +commit 374f2981d1f10bc4307f250f24b2a7ddb9b14be0 +Author: Paolo Bonzini <email address hidden> +Date: Fri May 17 12:37:03 2013 +0200 + + memory: protect current_map by RCU + + Replace the flat_view_mutex with RCU, avoiding futex contention for + dataplane on large systems and many iothreads. + + Reviewed-by: Fam Zheng <email address hidden> + Signed-off-by: Paolo Bonzini <email address hidden> + + + +kvm.git + qemu.git:4ff6f8e6_3d30395f +host kernel:4.0.0_rc1 +test on Haswell_EP +when hot plug the vf to guest for the second time, the guest works fine. + |