Bug 817245
| Summary: | [Tracing]usb_clear_device_feature tracepoint can not use | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | daiwei <wdai> |
| Component: | qemu-kvm | Assignee: | Gerd Hoffmann <kraxel> |
| Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6.3 | CC: | acathrow, areis, bsarathy, dyasny, flang, juzhang, michen, mkenneth, shuang, virt-maint |
| 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: | 2012-05-29 07:43:15 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: | |
| Embargoed: | |||
It's a trace of guest activities, so if the guest doesn't invoke set/clear device feature requests then you don't see the tracepoints trigger. Normal behavior. |
Description of problem: Version-Release number of selected component (if applicable): # uname -r; rpm -q qemu-kvm-rhev 2.6.32-262.el6.x86_64 qemu-kvm-rhev-0.12.1.2-2.287.el6.x86_64 How reproducible: 100% Steps to Reproduce: 1. On host #stap usb_clear_device_feature.stp 2. Boot guest CLI: /usr/libexec/qemu-kvm -m 2G -smp 2 -cpu Penryn -M rhel6.3.0 -boot order=dcn,menu=on -uuid e85e6987-c012-4025-878a-d4a5f521f8a5 -rtc base=utc,clock=host,driftfix=slew -no-kvm-pit-reinjection -monitor stdio -name win2008-64 -spice port=9000,disable-ticketing -vga qxl -global qxl-vga.vram_size=67108864 -drive file=/home/win2008sp2-64.raw,index=0,if=none,id=drive-virtio-disk1,media=disk,cache=none,boot=on,snapshot=off,readonly=off,format=raw,aio=native,werror=stop,rerror=stop -device virtio-blk-pci,scsi=off,drive=drive-virtio-disk1,id=virtio-disk1,bootindex=1 -netdev tap,id=hostnet0,vhost=on,script=/etc/qemu-ifup-switch -device virtio-net-pci,netdev=hostnet0,mac=00:10:20:2d:31:21,bus=pci.0,addr=0x4,id=net0 -device virtio-balloon-pci,bus=pci.0,id=balloon0 -usbdevice tablet 3. Actual results: nothing output Expected results: the scripts should return like : addr=2,feature=1,ret=0 addr=2,feature=1,ret=0 Additional info: 1. # cat usb_clear_device_feature.stp probe qemu.kvm.usb_clear_device_feature { printf("addr=%d,feature=%d,ret=%d\n",addr,feature,ret); } 2.usb_set_device_feature tracepoint has the same issue. 3.Test RHEL6.3 guest, no this issue.