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Subject[BUG] NMI lockup with Linux

I triggered this oops when I accidentally booted my kernel without its /usr/lib/dri/
module available:

BUG: NMI Watchdog detected LOCKUP on CPU2, eip c01097d0, registers:
Modules linked in: radeon drm pwc eeprom pcspkr p4_clockmod speedstep_lib nfsd exportfs ipv6
autofs4 nfs lockd sunrpc af_packet binfmt_misc video thermal processor fan button ac lp parport_pc
parport nvram video1394 raw1394 eth1394 compat_ioctl32 videodev snd_usb_audio snd_usb_lib
snd_intel8x0 snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_emu10k1
snd_rawmidi snd_ac97_codec snd_ac97_bus snd_seq_dummy ohci1394 snd_seq_oss snd_seq_midi_event
snd_seq snd_pcm_oss snd_mixer_oss ieee1394 snd_pcm ehci_hcd snd_seq_device snd_timer
snd_page_alloc snd_util_mem snd_hwdep snd soundcore uhci_hcd e1000 serio_raw psmouse ide_cd
e7xxx_edac edac_mc i2c_i801 i2c_core intel_agp agpgart cdrom usbcore ext3 jbd
CPU: 2
EIP: 0060:[<c01097d0>] Not tainted VLI
EFLAGS: 00000046 ( #1)
EIP is at ipi_handler+0x10/0x54
eax: 00000000 ebx: c22cce68 ecx: 00000000 edx: f7657000
esi: c01097c0 edi: 00000000 ebp: 00000013 esp: f7657e98
ds: 007b es: 007b ss: 0068
Process syslogd (pid: 1925, threadinfo=f7657000 task=f74fb030)
Stack: c22cce68 c01097c0 00000000 f7cd3600 c010c1f5 f6b820f8 f6b820c0 f7438784
c01032fc f6b820f8 00000000 00000213 f6b820c0 f7438784 f7cd3600 f7cd3698
0000007b 0000007b fffffffb c024e606 00000060 00000213 f881e710 00000000
Call Trace:
<c01097c0> ipi_handler+0x0/0x54 <c010c1f5> smp_call_function_interrupt+0x36/0x51
<c01032fc> call_function_interrupt+0x1c/0x24 <c024e606> _spin_unlock_irqrestore+0x5/0x23
<f881e710> __log_start_commit+0x23/0x2c [jbd] <f881968a> journal_stop+0x178/0x1cd [jbd]
<c0166c3f> __writeback_single_inode+0x1ad/0x309 <c0136bd4> do_writepages+0x2b/0x32
<c01329e9> __filemap_fdatawrite_range+0x65/0x70 <c0166db4> sync_inode+0x19/0x2a
<f8849215> ext3_sync_file+0x9d/0xb0 [ext3] <c014c3f8> do_fsync+0x51/0xa5
<c014c469> __do_fsync+0x1d/0x2b <c010285f> sysenter_past_esp+0x54/0x75
Code: 24 14 89 f9 89 da 89 f0 5b 5b 5e 5f e9 a9 fd ff ff b8 ea ff ff ff 5a 5b 5e 5f c3 55 57 56 53
89 c3 9c 5d fa f0 ff 08 eb 02 f3 90 <8b> 43 04 85 c0 74 f7 8b 73 10 83 fe ff 8b 3d c4 50 31 c0 74
console shuts up ...

This is a dual P4 Xeon machine with HT enabled, kernel compiled with gcc version 4.1.1 20060525
(Red Hat 4.1.1-1). Further information available on request.


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