2.5.2-pre1 dbench 32 hangs in vmstat "b" state

rwhron
2001-12-21T14:08:16Z

While running "dbench 32" on 2.5.2-pre1:

I noticed the test was taking much longer than usual,
and I could not do a new "login".

vmstat 8 looked like this:

r b w swpd free buff cache si so bi bo in cs us sy id
0 34 1 0 222504 12248 736088 0 0 0 0 103 59 0 0 100
1 34 1 0 222504 12248 736088 0 0 0 0 100 56 0 0 100
0 34 1 0 222504 12248 736088 0 0 0 0 103 59 0 0 100

<sysrq Sync Umount> did not print their "done" messages.
The "b" and "w" columns when up though:

r b w swpd free buff cache si so bi bo in cs us sy id
0 37 3 0 222456 12280 736092 0 0 0 0 222 269 0 0 100

There was no Oops.
2.5.1-dj3 completed dbench normally.

Configs between the 2 kernels:
diff 2.5.2-pre1 2.5.1-dj3
> CONFIG_IP_NF_QUEUE=m

2.5.1-pre1[01] and 2.5.1-final did not exhibit this behavior.

Hardware:
1333 Athlon
1GB RAM

CONFIG_HIGHMEM4G=y
CONFIG_HIGHMEM=y
--
Randy Hron