Bug 180535 - Xen dom0 fails to boot
Summary: Xen dom0 fails to boot
Alias: None
Product: Fedora
Classification: Fedora
Component: xen
Version: 5
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Rik van Riel
QA Contact:
Depends On:
Blocks: FC5Blocker
TreeView+ depends on / blocked
Reported: 2006-02-08 20:48 UTC by Michael Richardson
Modified: 2007-11-30 22:11 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2006-02-24 20:05:37 UTC
Type: ---

Attachments (Terms of Use)
script output of serial console from Xen boot (21.42 KB, text/plain)
2006-02-08 20:50 UTC, Michael Richardson
no flags Details

Description Michael Richardson 2006-02-08 20:48:58 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050927 Epiphany/1.4.8 (Debian)

Description of problem:
Xen guest kernel fails with:
(XEN) Initrd len 0x335200, start at 0xc045b000
(XEN) Scrubbing Free RAM: .....................done.
(XEN) Xen trace buffers: disabled
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen
Linux version 2.6.15-1.43_FC5hypervisor (bhcompile@ls20-bc1-13.build.redhat.com)
 (gcc version 4.1.0 20060206 (Red Hat 4.1.0-0.23)) #1 SMP Tue Feb 7 15:54:35 EST
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000075e01000 (usable)
1062MB HIGHMEM available.
832MB LOWMEM available.
BUG: spinlock bad magic on CPU#0, swapper/1 (Not tainted)
 lock: c1eeac60, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
 [<c01d3b93>] spin_bug+0x87/0xe9
 [<c01d3d1a>] _raw_spin_lock+0x1c/0xd1
 [<c02f8647>] _spin_lock_irqsave+0x22/0x27
 [<c0119fa2>] init_idle+0x49/0x66
 [<c011e866>] fork_idle+0x3c/0x4c
 [<c03de098>] smp_prepare_cpus+0xbf/0x1ab
 [<c0105053>] init+0x2a/0x2f5
 [<c0105029>] init+0x0/0x2f5
 [<c01059a5>] kernel_thread_helper+0x5/0xb
Kernel panic - not syncing: bad locking
 [<c011f07c>] panic+0x3c/0x18c
 [<c01d3bb6>] spin_bug+0xaa/0xe9
 [<c01d3d1a>] _raw_spin_lock+0x1c/0xd1
 [<c02f8647>] _spin_lock_irqsave+0x22/0x27
 [<c0119fa2>] init_idle+0x49/0x66
 [<c011e866>] fork_idle+0x3c/0x4c
 [<c03de098>] smp_prepare_cpus+0xbf/0x1ab
 [<c0105053>] init+0x2a/0x2f5
 [<c0105029>] init+0x0/0x2f5
 [<c01059a5>] kernel_thread_helper+0x5/0xb

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. install Xen from FC5_test2
2. yum update/yum upgrade
3. yum install xen-hypervisor-kernel

Additional info:

see attached file.

Comment 1 Michael Richardson 2006-02-08 20:50:03 UTC
Created attachment 124405 [details]
script output of serial console from Xen boot

Comment 2 Jeremy Katz 2006-02-08 20:57:45 UTC
maxcpus=1 will work around.

Comment 3 Rik van Riel 2006-02-09 01:24:24 UTC
I created and verified a patch for this bug, and also posted it upstream (since
it could affect other architectures with CPU hotplug too):


Comment 4 Rik van Riel 2006-02-09 01:34:17 UTC
Juan, I just committed the fix for the bug to our CVS tree.

Comment 5 Ask Bjørn Hansen 2006-02-10 01:42:59 UTC

Was that fix in kernel-xen-hypervisor-2.6.15-1.51_FC5 ?  (I don't have a serial console on my test 
machine but it appears to be doing the same thing).

  - ask

Comment 6 Stephen Tweedie 2006-02-24 20:06:22 UTC
Working for me on current rawhide/fc5t3 i686 SMP.

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