| Summary: | Met "Broke affinity for irq ..." in KVM guest kernel log with "virito driver + MSI" | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Sibiao Luo <sluo> |
| Component: | qemu-kvm | Assignee: | Virtualization Maintenance <virt-maint> |
| Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.5 | CC: | acathrow, alex.williamson, bsarathy, chayang, flang, juzhang, michen, mkenneth, qzhang, virt-maint, xfu |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-10-23 13:24:47 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
The whole kernel log when shotdown guest. # nc -U /tmp/ttyS0 Stopping certmonger: [ OK ] Stopping rhsmcertd...[ OK ] Stopping atd: [ OK ] Stopping cups: [ OK ] Stopping abrt daemon: [ OK ] Stopping sshd: [ OK ] Shutting down postfix: [ OK ] Stopping crond: [ OK ] Stopping automount: [ OK ] Stopping acpi daemon: [ OK ] Stopping HAL daemon: [ OK ] Stopping block device availability: Deactivating block devices: [SKIP]: unmount of vg_dhcp71101-lv_root (dm-0) mounted on / [ OK ] Stopping NetworkManager daemon: [ OK ] Stopping system message bus: [ OK ] Stopping rpcbind: [ OK ] Stopping auditd: type=1305 audit(1382488877.995:13): audit_pid=0 old=1354 auid=4294967295 ses=4294967295 subj=system_u:system_r:auditd_t:s0 res=1 [ OK ] type=1305 audit(1382488878.101:14): audit_enabled=0 old=1 auid=4294967295 ses=4294967295 subj=system_u:system_r:auditctl_t:s0 res=1 Shutting down system logger: [ OK ] Shutting down interface eth0: [ OK ] Shutting down loopback interface: [ OK ] ip6tables: Setting chains to policy ACCEPT: filter [ OK ] ip6tables: Flushing firewall rules: [ OK ] ip6tables: Unloading modules: [ OK ] iptables: Setting chains to policy ACCEPT: filter [ OK ] iptables: Flushing firewall rules: [ OK ] iptables: Unloading modules: [ OK ] Stopping monitoring for VG vg_dhcp71101: 2 logical volume(s) in volume group "vg_dhcp71101" unmonitored [ OK ] Sending all processes the TERM signal... [ OK ] Sending all processes the KILL signal... [ OK ] Saving random seed: [ OK ] Syncing hardware clock to system time [ OK ] Turning off swap: [ OK ] Turning off quotas: [ OK ] Unmounting file systems: [ OK ] init: Re-executing /sbin/init Halting system... ACPI: Preparing to enter system sleep state S5 Disabling non-boot CPUs ... Broke affinity for irq 9 Broke affinity for irq 11 Broke affinity for irq 27 SMP alternatives: switching to UP code Power down. Why is this a bug? The guest is shutting down and disabling non-boot CPUs. If an IRQ is assigned to a CPU being disabled then affinity is broken. This is not a bug, this is simply saying that the affinity configured (likely via irqbalanced) is now lost. Re-open if I'm missing some reason for this to be triaged further. (In reply to Alex Williamson from comment #2) > Why is this a bug? The guest is shutting down and disabling non-boot CPUs. > If an IRQ is assigned to a CPU being disabled then affinity is broken. This > is not a bug, this is simply saying that the affinity configured (likely via > irqbalanced) is now lost. Re-open if I'm missing some reason for this to be > triaged further. OK, good catch, we will highlight in our MSI feature wiki page, thanks for your explains. |
Description of problem: Met "Broke affinity for irq ..." in KVM guest kernel log with "virito driver + MSI". (1).If disable the MSI via append 'pci=nomsi' in guest kernel line, there is no any "Broke affinity for irq xxx" message appear in guest kernel log. (2).If use the 'IDE + e1000 + MSI', there also no "Broke affinity for irq xxx" message appear in guest kernel log. Version-Release number of selected component (if applicable): host info: 2.6.32-424.el6.x86_64 qemu-kvm-0.12.1.2-2.414.el6.x86_64 seabios-0.6.1.2-28.el6.x86_64 host info: 2.6.32-424.el6.x86_64 How reproducible: 100% Steps to Reproduce: 1.boot guest with 'virtio-blk + virtio-nic + MSI'. e.g:# /usr/libexec/qemu-kvm -M pc -S -cpu host -enable-kvm -m 2G -smp 2,sockets=2,cores=1,threads=1 -no-kvm-pit-reinjection -usb -device usb-tablet,id=input0 -name sluo -uuid 990ea161-6b67-47b2-b803-19fb01d30d30 -rtc base=localtime,clock=host,driftfix=slew -device virtio-serial-pci,id=virtio-serial0,max_ports=16,vectors=0,bus=pci.0,addr=0x3 -chardev socket,id=channel1,path=/tmp/helloworld1,server,nowait -device virtserialport,chardev=channel1,name=com.redhat.rhevm.vdsm,bus=virtio-serial0.0,id=port1 -chardev socket,id=channel2,path=/tmp/helloworld2,server,nowait -device virtserialport,chardev=channel2,name=com.redhat.rhevm.vdsm,bus=virtio-serial0.0,id=port2 -drive file=/home/RHEL-6.5-Snapshot-4-Server-x86_64.qcow2,if=none,id=drive-virtio-disk,format=qcow2,cache=none,aio=native,werror=stop,rerror=stop -device virtio-blk-pci,vectors=0,bus=pci.0,addr=0x4,scsi=off,drive=drive-virtio-disk,id=virtio-disk,bootindex=1 -netdev tap,id=hostnet0,vhost=on,script=/etc/qemu-ifup -device virtio-net-pci,netdev=hostnet0,id=virtio-net-pci0,mac=00:01:02:B6:40:21,bus=pci.0,addr=0x5 -device virtio-balloon-pci,id=ballooning,bus=pci.0,addr=0x6 -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -drive file=/home/my-data-disk.raw,if=none,id=drive-data-disk,format=raw,cache=none,werror=stop,rerror=stop -device virtio-blk-pci,bus=pci.0,addr=0x7,drive=drive-data-disk,id=data-disk -k en-us -boot menu=on -qmp tcp:0:4444,server,nowait -serial unix:/tmp/ttyS0,server,nowait -vnc :1 -spice disable-ticketing,port=5931 -monitor stdio # cat /proc/interrupts CPU0 CPU1 0: 155 0 IO-APIC-edge timer 1: 111 0 IO-APIC-edge i8042 4: 173 0 IO-APIC-edge serial 7: 0 0 IO-APIC-edge parport0 8: 0 0 IO-APIC-edge rtc0 9: 0 0 IO-APIC-fasteoi acpi 10: 1 0 IO-APIC-fasteoi virtio0 11: 3581 3492 IO-APIC-fasteoi uhci_hcd:usb1, virtio1, virtio3 12: 104 0 IO-APIC-edge i8042 14: 0 0 IO-APIC-edge ata_piix 15: 1556 0 IO-APIC-edge ata_piix 24: 0 0 PCI-MSI-edge virtio4-config 25: 284 0 PCI-MSI-edge virtio4-requests 26: 0 0 PCI-MSI-edge virtio2-config 27: 264 7410 PCI-MSI-edge virtio2-input 28: 1 0 PCI-MSI-edge virtio2-output NMI: 10 11 Non-maskable interrupts LOC: 23704 22719 Local timer interrupts SPU: 0 0 Spurious interrupts PMI: 10 11 Performance monitoring interrupts IWI: 0 0 IRQ work interrupts RES: 2886 3587 Rescheduling interrupts CAL: 13 180 Function call interrupts TLB: 447 638 TLB shootdowns TRM: 0 0 Thermal event interrupts THR: 0 0 Threshold APIC interrupts MCE: 0 0 Machine check exceptions MCP: 2 2 Machine check polls ERR: 0 MIS: 0 # dmesg | grep irq ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level) nr_irqs_gsi: 24 NR_IRQS:33024 nr_irqs:424 pnp 00:01: [irq 8] pnp 00:02: [irq 1] pnp 00:03: [irq 12] pnp 00:04: [irq 6] pnp 00:05: [irq 7] pnp 00:06: [irq 4] ipmi_si: Trying default-specified kcs state machine at i/o address 0xca2, slave address 0x0, irq 0 ipmi_si: Trying default-specified smic state machine at i/o address 0xca9, slave address 0x0, irq 0 ipmi_si: Trying default-specified bt state machine at i/o address 0xe4, slave address 0x0, irq 0 serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A 00:06: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A uhci_hcd 0000:00:01.2: irq 11, io base 0x0000c020 PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12 serio: i8042 KBD port at 0x60,0x64 irq 1 serio: i8042 AUX port at 0x60,0x64 irq 12 ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc000 irq 14 ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc008 irq 15 alloc irq_desc for 24 on node -1 alloc kstat_irqs on node -1 virtio-pci 0000:00:07.0: irq 24 for MSI/MSI-X alloc irq_desc for 25 on node -1 alloc kstat_irqs on node -1 virtio-pci 0000:00:07.0: irq 25 for MSI/MSI-X alloc irq_desc for 26 on node -1 alloc kstat_irqs on node -1 virtio-pci 0000:00:05.0: irq 26 for MSI/MSI-X alloc irq_desc for 27 on node -1 alloc kstat_irqs on node -1 virtio-pci 0000:00:05.0: irq 27 for MSI/MSI-X alloc irq_desc for 28 on node -1 alloc kstat_irqs on node -1 virtio-pci 0000:00:05.0: irq 28 for MSI/MSI-X parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE] 2.shotdown guest. guest ]# poweroff Actual results: after step 2, there is "Broke affinity for irq ..." in KVM guest kernel log. ... init: Re-executing /sbin/init Halting system... ACPI: Preparing to enter system sleep state S5 Disabling non-boot CPUs ... Broke affinity for irq 9 Broke affinity for irq 11 Broke affinity for irq 27 SMP alternatives: switching to UP code Power down. Expected results: there should no "Broke affinity for irq xxx" message appear in guest kernel log. Additional info: