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+id = 1151
+title = "when guest unexpect shutdown,can't enter system,the terminal has a black screen"
+state = "opened"
+created_at = "2022-08-12T06:34:17.125Z"
+closed_at = "n/a"
+labels = ["accel: KVM", "host: x86", "target: i386"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1151"
+host-os = "centos8"
+host-arch = "x86"
+qemu-version = "6.2.0"
+guest-os = "Windows 7"
+guest-arch = "x86"
+description = """"""
+reproduce = """1.guest unexpect shutdown 
+
+2.when start again,cpu usage is high and can't enter the guest system
+
+3.restart guest can recovery
+
+**libvirt print:**
+
+`2022-08-11 14:39:58.080+0000: 1942: warning : qemuDomainObjTaint:6079 : Domain id=117 name='GDT99d2578e-f06e-4fbe-88dd-7d9dd56fd02d' uuid=99d2578e-f06e-4fbe-88dd-7d9dd56fd02d is tainted: high-privileges
+
+2022-08-11 14:39:58.080+0000: 1942: warning : qemuDomainObjTaint:6079 : Domain id=117 name='GDT99d2578e-f06e-4fbe-88dd-7d9dd56fd02d' uuid=99d2578e-f06e-4fbe-88dd-7d9dd56fd02d is tainted: custom-argv
+
+2022-08-11 14:40:28.792+0000: 741037: warning : qemuDomainObjBeginJobInternal:946 : Cannot start job (modify, none, none) for domain GDT99d2578e-f06e-4fbe-88dd-7d9dd56fd02d; current job is (none, none, migration in) owned by (0 <null>, 0 <null>, 0 remoteDispatchDomainMigratePrepare3Params (flags=0x203)) for (0s, 0s, 30s)
+
+2022-08-11 14:40:28.792+0000: 741037: error : qemuDomainObjBeginJobInternal:968 : Timed out during operation: cannot acquire state change lock (held by monitor=remoteDispatchDomainMigratePrepare3Params)
+`
+
+
+**user perf to analyse:**
+
+\\#top -d 3 -Hp 1311519
+
+![image](/uploads/2ec511a049b43f827368eb84c46ee2ed/image.png)
+
+\\#perf record -a -g -p 1311519 sleep 20
+
+\\#report -n --header --stdio
+
+![image](/uploads/b8c66c590e4b1d444d102923f6247dce/image.png)
+
+
+**query kvm stat:**
+
+ \\# perf stat -e 'kvm:*' -a -p 1311519 sleep 20
+
+![image](/uploads/6d50e1b48d795fe68bfebb05b7382a24/image.png)
+
+
+kvm vmexit stat:
+
+\\#perf kvm stat record -a -p 1311519 sleep 10
+
+\\#perf kvm stat report --event=vmexit
+
+![image](/uploads/3f7f0c35f8734ccebcdf883cb059f12c/image.png)"""
+additional = "n/a"