Hello,
I'm working on performance testing netfilter ip_conntrack. The tested
machine is a dual Xeon PC with Serverworks chipset and e1000 cards.
"Calibrating" without ip_conntrack loaded in went fine. However as
the ip_conntrack module was removed after a test, sometimes I got the
message:
slab error in kmem_cache_destroy(): cache `ip_conntrack': Can't free all
objects
Call Trace:
[<c0136fe9>] kmem_cache_destroy+0xd8/0x116
[<f889f3ba>] ip_conntrack_cleanup+0x43/0x6c [ip_conntrack]
[<f889d61a>] init_or_cleanup+0x131/0x190 [ip_conntrack]
[<f889fc13>] fini+0xf/0x19 [ip_conntrack]
[<c012dd76>] sys_delete_module+0x13c/0x169
[<c01402ab>] sys_munmap+0x45/0x66
[<c0108f9b>] syscall_call+0x7/0xb
I cannot reliably reproduce the error. Sometimes it comes at the
first test run, sometimes at say the 20th, but I have never been able to
run all the planned 150 tests.
This happens both with 2.5.74 and 2.6.0-test1.
Slab cache ip_conntrack: 2052678 allocs vs 2052678 frees
slab error in kmem_cache_destroy(): cache `ip_conntrack': Can't free all objects