2.2.13 wait_on_bh lockups on SMP

[Mark van Walraven]

Hi,

I am getting lock ups on a production server with a high network load
once or twice a day.  After a hang earlier this evening, the same message
repeating off the console screen:

	wait_on_bh, CPU 0:
	irq: 0 [0 0]
	bh:  1 [0 1]
	<[c010af05]> <[c015c994]> <[c016a18e]> <[c014c4e6]>

(This is slightly different to what [e-mail] reported last month
http://www.deja.com/=dnc/[ST_rn=ps]/getdoc.xp?AN=563124486&fmt=text .)

Another hang happened about an hour later, this time with nothing written
to the console.

	c010aecc T synchronize_bh
	c014c4ac T sock_recvmsg
	c015c800 T tcp_recvmsg
	c016a100 T inet_recvmsg

Another system, with identical hardware and kernel, but not quite so heavily
loaded, has been running flawlessly for a couple of weeks.

Probably-irrelevant details: Dell PowerEdge 2300 with AMI MegaRAID;
kernel built from the Debian kernel-source-2.2.13_2.2.13-2 package,
to which I added freeswan-1.1 - otherwise a vanilla Debian 2.1 system;
eth0 and eth1 are eepro100 (module), though only eth0 is up;
CONFIG_M686, CONFIG_X86_GOOD_APIC, CONFIG_1GB, CONFIG_MTRR, CONFIG_SMP.

Of course, further config details are available on request.

I'd really appreciate any assistance - this is interrupting our services,
as well as my so-called holiday.

Thanks,

Mark.