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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/kvm/1422285
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloademulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+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
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