I am running v0.90.6 on a kernel with the RealTime Patch set.

Kernel - 2.6.29.6  (latest stable kernel from kernel.org)
RT Patches - rt24

[root@<host> ~]#uname -a
Linux <host> 2.6.29.6-rt24 #2 SMP PREEMPT RT Wed Nov 4 06:07:11 PST 2009
x86_64 x86_64 x86_64 GNU/Linux        

I compiled the modules with this kernel running and the kernel sources
available.  I have loaded the openvswitch_mod and brcompat_mod modules and
started the appropriate daemons.

Nov 12 09:24:27 <host> kernel: Open vSwitch 0.90.6, built Nov  4 2009
10:34:18
Nov 12 09:24:34 <host> kernel: Open vSwitch Bridge Compatibility, built Nov
4 2009 10:34:16         

The following errors are running through the log [/var/log/messages] ... not
continuously, but during intermittent periods.

Nov 12 09:43:34 <host> kernel: BUG: using smp_processor_id() in preemptible
[00000000] code: ovs-vswitchd/20192
Nov 12 09:43:34 <host> kernel: caller is dp_dev_recv+0x67/0x83
[openvswitch_mod]
Nov 12 09:43:34 <host> kernel: Pid: 20192, comm: ovs-vswitchd Not tainted
2.6.29.6-rt24 #2
Nov 12 09:43:34 <host> kernel: Call Trace:
Nov 12 09:43:34 <host> kernel:  [<ffffffff8035c880>] ?
debug_smp_processor_id+0xd4/0xe8
Nov 12 09:43:34 <host> kernel:  [<ffffffffa01b0bac>] ? dp_dev_recv+0x67/0x83
[openvswitch_mod]
Nov 12 09:43:34 <host> kernel:  [<ffffffffa01ae2c2>] ?
execute_actions+0x85/0x6bb [openvswitch_mod]
Nov 12 09:43:34 <host> kernel:  [<ffffffff8044b68c>] ?
__alloc_skb+0x7f/0x12a
Nov 12 09:43:34 <host> kernel:  [<ffffffffa01b081e>] ?
openvswitch_ioctl+0xc51/0xcc8 [openvswitch_mod]
Nov 12 09:43:34 <host> kernel:  [<ffffffff802ae0e5>] ?
kmem_cache_free+0x80/0x10f
Nov 12 09:43:34 <host> kernel:  [<ffffffff802c17e6>] ? vfs_ioctl+0x21/0x6b
Nov 12 09:43:34 <host> kernel:  [<ffffffff802c1ccd>] ?
do_vfs_ioctl+0x49d/0x4f7
Nov 12 09:43:34 <host> kernel:  [<ffffffff802c1d78>] ? sys_ioctl+0x51/0x70
Nov 12 09:43:34 <host> kernel:  [<ffffffff80284f12>] ? perf_mmap+0xf4/0x212
Nov 12 09:43:34 <host> kernel:  [<ffffffff8020baab>] ?
system_call_fastpath+0x16/0x1b
Nov 12 09:43:34 <host> kernel:  [<ffffffff80284f12>] ? perf_mmap+0xf4/0x212


I do not get these errors when I run the non-RT kernel.

John


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