Bug 438002

Thanks. Code is:

        if (DEBUG_LOCKS_WARN_ON(unlikely(!early_boot_irqs_enabled)))
                return;

Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

Still present in 2.6.26-0.1.rc6.git2.fc10.x86_64.xen

In kernel-xen-2.6.27-0.2.rc0.git6.fc10.x86_64, the original WARN has gone away,
but now replaced with:

WARNING: at kernel/lockdep.c:2068 trace_hardirqs_on_caller+0xbe/0x133() (Not
tainted)
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.27-0.2.rc0.git6.fc10.x86_64.xen #1

Call Trace:
 [<ffffffff810431c8>] warn_on_slowpath+0x65/0xac
 [<ffffffff811ddd71>] ? xen_raw_console_write+0x28/0x3b
 [<ffffffff811dde0b>] ? xen_raw_printk+0x87/0x89
 [<ffffffff81011054>] ? mcount_call+0x5/0x31
 [<ffffffff81011054>] ? mcount_call+0x5/0x31
 [<ffffffff8100bf3c>] ? xen_mc_flush+0x14c/0x1a5
 [<ffffffff81063894>] ? trace_hardirqs_off+0xd/0xf
 [<ffffffff81011054>] ? mcount_call+0x5/0x31
 [<ffffffff8100bf3c>] ? xen_mc_flush+0x14c/0x1a5
 [<ffffffff810648f7>] ? trace_hardirqs_on+0xd/0xf
 [<ffffffff81064875>] trace_hardirqs_on_caller+0xbe/0x133
 [<ffffffff810648f7>] trace_hardirqs_on+0xd/0xf
 [<ffffffff81519162>] xen_start_kernel+0x73b/0x865

kernel-xen is dead, moving to kernel

Triaged

Does this still persist in 2.6.27-final based kernels?

I don't see any warnings with 2.6.27.4-58.fc10.x86_64.  I assume lockdep debugging is still present, or would I need to pass a kernel argument?

Fairly sure it's been turned off. Does it happen with kernel-debug?b

With kernel-debug:

WARNING: at kernel/lockdep.c:2182 trace_hardirqs_on_caller+0xbe/0x133() (Not tainted)
Modules linked in:                                                               
Pid: 0, comm: swapper Not tainted 2.6.27.4-68.fc10.x86_64.debug #1               

Call Trace:
 [<ffffffff8104254a>] warn_on_slowpath+0x60/0x90
 [<ffffffff81062792>] ? trace_hardirqs_off_caller+0x43/0xa4
 [<ffffffff81062800>] ? trace_hardirqs_off+0xd/0xf         
 [<ffffffff81063731>] trace_hardirqs_on_caller+0xbe/0x133  
 [<ffffffff810637b3>] trace_hardirqs_on+0xd/0xf            
 [<ffffffff8100ac2a>] xen_mc_issue+0x49/0x62               
 [<ffffffff8165ed72>] xen_start_kernel+0x6db/0x7f0

This is a harmless warning, removing from F10 blocker

This bug appears to have been reported against 'rawhide' during the Fedora 10 development cycle.
Changing version to '10'.

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