Bug 475780
| Summary: | Kernel oops in paravirtualized xen: IP: [<d0833ec7>] :xen_blkfront:backend_changed+0x262/0x31d | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Jan ONDREJ <ondrejj> |
| Component: | kernel | Assignee: | Xen Maintainance List <xen-maint> |
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 10 | CC: | clalance, kernel-maint, markmc, virt-maint |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2009-12-18 07:14:35 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
After this chnage of my xen config works well: disk = [ 'phy:/dev/r5/aspi_hda,xvda,w', #'phy:/dev/cdrom,hdd:cdrom,r' ] Commenting out CDROM let's me boot this machine without problems. May be there is an problem with CDROM driver. So now it's possible, that you can reproduce this problem on your machine. Where do the xen drivers come from? They're not part of the kernel package AFAICT. Chuck,
FYI; those Xen blkfront kernel drivers are indeed in the base kernel. The block driver lives under drivers/block/xen-blkfront.c, the network driver lives under drivers/net/xen-netfront.c, and common xen stuff lives under drivers/xen
Chris Lalancette
Same problem on 2.6.29: http://koji.fedoraproject.org/koji/buildinfo?buildID=80840 jan: thanks for the report; could you send the stack trace to the xen-devel list to see if anyone there has any input? (In reply to comment #5) > jan: thanks for the report; could you send the stack trace to the xen-devel > list to see if anyone there has any input? Which "stack trace"? This from bugreport or one created byt "echo t > /proc/sysrq-trigger" ? My kernel continues to work normally, just without network connection, so when is the right time to create trace? This message is a reminder that Fedora 10 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 10. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '10'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 10's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 10 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed. |
Description of problem: After upgrade from Fedora 9 to Fedora 10 one paravirtualized xen server still shows error. Version-Release number of selected component (if applicable): Same problem for: kernel-PAE-2.6.27.5-117.fc10.i686 kernel-PAE-2.6.27.7-134.fc10.i686 No problem on fc9 kernels. How reproducible: Always on one machine, never on others. Steps to Reproduce: I think it's problematic to reproduce on your machine. I have this problem only on one virtual machine, other virtual machines on same server works well. My server is an x86_64 Fedora 8 with update kernel-xen: Linux vs2.upjs.sk 2.6.21.7-5.fc8xen #1 SMP Thu Aug 7 12:44:22 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux Actual results: Mounting proc filesystem Mounting sysfs filesystem Creating /dev Creating initial device nodes blkfront: xvda: barriers enabled xvda: xvda1 BUG: unable to handle kernel NULL pointer dereference at 00000000 IP: [<d0833ec7>] :xen_blkfront:backend_changed+0x262/0x31d *pdpt = 00000000a7c25027 Oops: 0000 [#1] SMP Modules linked in: xen_blkfront(+) Pid: 15, comm: xenwatch Not tainted (2.6.27.7-134.fc10.i686.PAE #1) EIP: 0061:[<d0833ec7>] EFLAGS: 00010246 CPU: 0 EIP is at backend_changed+0x262/0x31d [xen_blkfront] EAX: cf848800 EBX: cf848800 ECX: d0833c65 EDX: 00000000 ESI: cf848800 EDI: cfc8c000 EBP: cf847f8c ESP: cf847f54 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069 Process xenwatch (pid: 15, ti=cf847000 task=cf854010 task.ti=cf847000) Stack: 00000000 c07a702f cf848800 cfc88080 d083546c cf847f8c c057836e 00000000 cebf8000 c076fb3f c07a702f cf848800 cfc88080 d083546c cf847fa0 c057a2ba cf848810 cfc88000 cf847fc4 cf847fd0 c057931f cf847fb0 00000000 00000000 Call Trace: [<c057836e>] ? xenbus_read_driver_state+0x1e/0x31 [<c057a2ba>] ? otherend_changed+0x65/0x6a [<c057931f>] ? xenwatch_thread+0xd7/0xff [<c0442d3a>] ? autoremove_wake_function+0x0/0x33 [<c0579248>] ? xenwatch_thread+0x0/0xff [<c0442a97>] ? kthread+0x3b/0x61 [<c0442a5c>] ? kthread+0x0/0x61 [<c04098f7>] ? kernel_thread_helper+0x7/0x10 ======================= Code: 84 89 00 00 00 83 4e 44 08 e9 80 00 00 00 8b 07 ff 70 08 68 41 43 83 d0 6a ed 50 e8 01 48 d4 ef 83 c4 10 e9 b6 00 00 00 8b 57 04 <8b> 02 c1 e0 14 0b 42 04 e8 66 4c c8 ef 85 c0 89 c3 75 10 68 51 EIP: [<d0833ec7>] backend_changed+0x262/0x31d [xen_blkfront] SS:ESP 0069:cf847f54 ---[ end trace 699266966296a986 ]--- Expected results: Clean boot. Additional info: It's possible, that it is a problem of fedora-8 kernel-xen, but I am not sure. Also tryed to rerun mkinitrd as described in bug#429937 without succes. After this error system boots normally, but there is NO link on eth0, I can't use network connection on this virtual server.