Strange activity on my server

My server have been crashing/slow lately. Today I got the following
information from top:

$ uname -a
Linux XXX 2.6.10-1.770_FC2smp #1 SMP Sat Feb 26 21:54:45 EST 2005 i686 i686 i386 GNU/Linux
$ top
top - 18:28:33 up 10:06, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 81 total, 1 running, 80 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 100.0% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 1034696k total, 1017076k used, 17620k free, 206272k buffers
Swap: 2040212k total, 0k used, 2040212k free, 574508k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 16 0 2256 460 392 S 0.0 0.0 0:01.25 init
2 root RT 0 0 0 0 S 0.0 0.0 0:00.05 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.03 ksoftirqd/0
4 root RT 0 0 0 0 S 0.0 0.0 0:00.07 migration/1
5 root 34 19 0 0 0 S 0.0 0.0 0:00.01 ksoftirqd/1
6 root RT 0 0 0 0 S 0.0 0.0 0:00.27 migration/2
7 root 34 19 0 0 0 S 0.0 0.0 0:00.05 ksoftirqd/2
8 root RT 0 0 0 0 S 0.0 0.0 0:00.06 migration/3
9 root 34 19 0 0 0 S 0.0 0.0 0:00.02 ksoftirqd/3
10 root 5 -10 0 0 0 S 0.0 0.0 0:00.53 events/0
11 root 5 -10 0 0 0 S 0.0 0.0 0:00.60 events/1
12 root 5 -10 0 0 0 S 0.0 0.0 0:00.57 events/2
13 root 5 -10 0 0 0 S 0.0 0.0 0:00.45 events/3
14 root 6 -10 0 0 0 S 0.0 0.0 0:00.01 khelper
29 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 kacpid
134 root 5 -10 0 0 0 S 0.0 0.0 0:00.01 kblockd/0
135 root 5 -10 0 0 0 S 0.0 0.0 0:00.05 kblockd/1
136 root 5 -10 0 0 0 S 0.0 0.0 0:00.05 kblockd/2
137 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/3
145 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd
205 root 15 0 0 0 0 S 0.0 0.0 0:00.00 pdflush
206 root 15 0 0 0 0 S 0.0 0.0 0:00.33 pdflush
208 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0
207 root 15 0 0 0 0 S 0.0 0.0 0:00.96 kswapd0
209 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 aio/1
210 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 aio/2
211 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 aio/3
303 root 25 0 0 0 0 S 0.0 0.0 0:00.00 kseriod
504 root 22 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_0
505 root 15 0 0 0 0 S 0.0 0.0 0:00.00 aacraid
521 root 15 0 0 0 0 S 0.0 0.0 0:00.30 kjournald
684 root 6 -10 2904 304 224 S 0.0 0.0 0:00.04 udevd
1877 root 15 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
1878 root 15 0 0 0 0 S 0.0 0.0 0:00.25 kjournald
3202 root 16 0 1896 600 504 S 0.0 0.1 0:00.10 syslogd
3206 root 16 0 2600 444 380 S 0.0 0.0 0:00.00 klogd
3217 root 16 0 2616 456 384 S 0.0 0.0 0:00.00 irqbalance
$ lsmod
Module Size Used by
parport_pc 29573 0
lp 15405 0
parport 37513 2 parport_pc,lp
autofs4 21829 0
tg3 79557 0
ipt_REJECT 10561 1
ipt_state 5953 11
ip_conntrack 45829 1 ipt_state
iptable_filter 7617 1
ip_tables 21185 3 ipt_REJECT,ipt_state,iptable_filter
ip6table_filter 6721 1
ip6_tables 21825 1 ip6table_filter
md5 8001 1
ipv6 240225 26
floppy 56913 0
sg 38881 0
microcode 11489 0
dm_mod 58181 0
joydev 13057 0
ohci_hcd 24277 0
video 19653 0
button 10577 0
battery 13253 0
ac 8773 0
ext3 121929 3
jbd 57561 1 ext3
aacraid 44241 4
sd_mod 19905 5
scsi_mod 116289 3 sg,aacraid,sd_mod
$

I don't know what 'migration' is, but it seems very strange that
anything on this general server has a real-time priority! I
don't recall any kernel code 'migration'. Can anyone enlighten
me? I have examined my log files and roon chkrootkit, but have
seen nothing about this.

(Let me know if any other details would be helpful, I'll post a followup.)

-Wayne