| Summary: | cpu consuming near 100% after inserting a usb flash drive | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Andrew <travneff> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 15 | CC: | aquini, davidz, gansalmon, itamar, jonathan, jwboyer, kay, kernel-maint, madhu.chinakonda, travneff |
| Target Milestone: | --- | Flags: | travneff:
needinfo-
|
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-08-17 12:06:20 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
What is the kernel and udev versions? Pretty sure this is caused by how we are detecting media changes (GET_EVENT instead of TUR) - see http://www.spinics.net/lists/hotplug/msg04965.html and surrounding messages for fixes. Reassigning to kernel and adding Kay to the Cc. Kernel and udev are installed from current fedora stable repos: $ uname -a Linux localhost 2.6.38.8-32.fc15.x86_64 #1 SMP Mon Jun 13 19:49:05 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux udev: libgudev1-167-4.fc15.x86_64 udev-167-4.fc15.x86_64 libudev-167-4.fc15.x86_64 I've tried following workaround and it helps, thank you # echo 'KERNEL=="sr0", ACTION=="change", WAIT_FOR="nothing"' >> /etc/udev/rules.d/my.rules It is a Sandisk Cruzer device? The firmware is terribly broken and reports endless media changes. Any access to the device will cause a media change, not only for the fake cdrom, also for the udeb-storage device. Udev runs in an endless loop, with an ever growing event queue. (In reply to comment #2) > I've tried following workaround and it helps, thank you > > # echo 'KERNEL=="sr0", ACTION=="change", WAIT_FOR="nothing"' >> > /etc/udev/rules.d/my.rules That doesn't help anything really. It's the equivalent of adding: "sleep 10" to the cdrom event handler. It just makes the endless loop slower, but udev is still dead-locked. A patch to work around the issue in the kernel is on the way: http://www.spinics.net/lists/linux-scsi/msg53075.html > It is a Sandisk Cruzer device?
No, it is Transcend JetFlash 16GB, but the behaviour is like you describe.
I understand that udev rule is not a solution.
Patches, which are expected to detect the issue and work around it, are merged upstream now: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=79b9677d885d1a792bc103f2febb06f91f92de43 This patch is present in the 2.6.40.3-0 update that I just pushed to updates-testing. Yes, this update stopped the infinite loop. Now `udevadm monitor` shows the following: UDEV [1313515134.688731] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) KERNEL[1313515134.692017] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) UDEV [1313515134.722588] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) KERNEL[1313515134.725735] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) UDEV [1313515134.758158] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) KERNEL[1313515134.760891] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) UDEV [1313515134.791630] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) KERNEL[1313515134.794862] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) UDEV [1313515134.827038] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) KERNEL[1313515134.829643] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) UDEV [1313515134.844804] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:0/block/sdb/sdb2 (block) UDEV [1313515134.861678] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) [ 74.849585] sr 6:0:0:1: GET_EVENT and TUR disagree continuously, suppress GET_EVENT events KERNEL[1313515134.865795] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) UDEV [1313515134.893514] add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:0/block/sdb/sdb1 (block) UDEV [1313515134.894994] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) UDEV [1313515134.908605] change /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/host6/target6:0:0/6:0:0:1/block/sr0 (block) [output stopped] This issue can be closed, I think. Thanks for testing! |
Description of problem: I have a usb flash drive which is recognized as two devices: usual flash drive and CD-ROM drive (it stores some autorun data). After inserting it CPU load became very high, for example: Cpu(s): 54.5%us, 44.9%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st Mem: 3091920k total, 1245112k used, 1846808k free, 134116k buffers Swap: 2097148k total, 0k used, 2097148k free, 466172k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 957 dbus 20 0 95920 2232 1248 S 14.5 0.1 0:14.12 dbus-daemon 2235 root 20 0 124m 3616 2556 S 13.9 0.1 0:12.00 udisks-daemon udisks shows there are a lot of "changed" notifies for this device (several per second): $ udisks --monitor Monitoring activity from the disks daemon. Press Ctrl+C to cancel. changed: /org/freedesktop/UDisks/devices/sr0 changed: /org/freedesktop/UDisks/devices/sr0 changed: /org/freedesktop/UDisks/devices/sr0 changed: /org/freedesktop/UDisks/devices/sr0 changed: /org/freedesktop/UDisks/devices/sr0 [many repeats] Running "udisks --inhibit" or "udisks --inhibit-all-polling" doesn't help. Adding following variable to the string in /etc/udev/rules.d/70-persistent-cd.rules doesn't help too: ENV{UDISKS_DISABLE_POLLING}="1" HAL is not launched. There are just one packet installed, which is needed as a dependency for gnome-vfs2, gimp, thunderbird and others: $ rpm -qa | grep hal hal-libs-0.5.14-6.fc15.x86_64 Reproducible: always. Steps to Reproduce: Just insert a flash drive to USB port (no mounting or other operations required). Additional info: These issues may be related, I think: https://bugzilla.redhat.com/show_bug.cgi?id=684614 https://bugzilla.redhat.com/show_bug.cgi?id=637973 https://bugzilla.redhat.com/show_bug.cgi?id=600592 sr0 device info: $ udisks --show-info /dev/sr0 Showing information for /org/freedesktop/UDisks/devices/sr0 native-path: /sys/devices/pci0000:00/0000:00:02.1/usb1/1-2/1-2:1.0/host6/target6:0:0/6:0:0:1/block/sr0 device: 11:0 device-file: /dev/sr0 presentation: /dev/sr0 by-id: /dev/disk/by-id/usb-Generic_AutoRun_Disk_LWN98399-0:1 by-path: /dev/disk/by-path/pci-0000:00:02.1-usb-0:2:1.0-scsi-0:0:0:1 detected at: Tue Jun 28 11:46:28 2011 system internal: 0 removable: 1 has media: 1 (detected at Tue Jun 28 11:46:28 2011) detects change: 1 detection by polling: 0 detection inhibitable: 1 detection inhibited: 0 is read only: 0 is mounted: 0 mount paths: mounted by uid: 0 presentation hide: 0 presentation nopolicy: 0 presentation name: presentation icon: size: 11540480 block size: 512 job underway: no usage: type: version: uuid: label: optical disc: blank: 0 appendable: 0 closed: 0 num tracks: 0 num audio tracks: 0 num sessions: 0 drive: vendor: Generic model: AutoRun Disk revision: 8.00 serial: LWN98399 WWN: detachable: 1 can spindown: 0 rotational media: Yes, unknown rate write-cache: unknown ejectable: 1 adapter: Unknown ports: similar devices: media: optical_cd compat: optical_cd optical_mrw optical_mrw_w interface: usb if speed: 480000000 bits/s ATA SMART: not available