lockup on 6.4 while bce in MGETHDR

[pluknet]

Hi.

This is on 6.4-S as of April with uptime about 2 months.
Machine could not be accessed via network, didn't reply on ping.
Looking at backtrace it's here:

if_bce.c::bce_get_buf():
                /* This is a new mbuf allocation. */
                MGETHDR(m_new, M_DONTWAIT, MT_DATA);


>From brk-seq:

db> bt
Tracing pid 31 tid 100034 td 0xc833ad00
kdb_enter(c097ef95) at kdb_enter+0x2b
siointr1(c83a3c00) at siointr1+0xce
siointr(c83a3c00) at siointr+0x5e
intr_execute_handlers(c80ee4c8,e8963abc,4,e8963b0c,c08cba63,...) at
intr_execute_handlers+0xe1
lapic_handle_intr(38) at lapic_handle_intr+0x2e
Xapic_isr1() at Xapic_isr1+0x33
--- interrupt, eip = 0xc06a393e, esp = 0xe8963b00, ebp = 0xe8963b0c
---
_mtx_lock_sleep(c0a655c0,c833ad00,0,0,0) at _mtx_lock_sleep+0xb6
kmem_malloc(c14680c0,1000,101,e8963b8c,c082cadd,...) at
kmem_malloc+0x328
page_alloc(c1456000,1000,e8963b7f,101,c8b10016,...) at page_alloc+0x1a
slab_zalloc(c1456000,101,0,d278ca90,c915aa3c,...) at slab_zalloc+0xdd
uma_zone_slab(c1456000,1) at uma_zone_slab+0xf0
uma_zalloc_bucket(c1456000,1) at uma_zalloc_bucket+0x15c
uma_zalloc_arg(c1456000,d0729e00,1) at uma_zalloc_arg+0x292
bce_get_buf(c8363000,0,e8963c7c,e8963c7e,e8963c80) at bce_get_buf+0xef
bce_fill_rx_chain(c8363000,7047,d0729000,cbd86000,59375b37,...) at
bce_fill_rx_chain+0x48
bce_rx_intr(c8363000) at bce_rx_intr+0x301
bce_intr(c8363000) at bce_intr+0xf4
ithread_execute_handlers(c8337c90,c8230a80) at
ithread_execute_handlers+0x125
ithread_loop(c835f860,e8963d38) at ithread_loop+0x55
fork_exit(c0694a38,c835f860,e8963d38) at fork_exit+0x71
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xe8963d6c, ebp = 0 ---

db> ps
  pid  ppid  pgrp   uid   state   wmesg     wchan    cmd
17102 17100 15549     0  L      *vm page  0xcce93480 awk
17101 17100 15549     0  L      *Giant    0xc8737480 grep
17100 17098 15549     0  S       wait     0xc8726a78 sh
17098 15570 15549     0  S       wait     0xc98c2a78 sh
16935 30771 30771  8382  RL                          httpd
16656 16349 16349 10346  S       biord    0xdc389368 php
16564 16460 16460 18332  SL      vmpfw    0xc365da98 lynx
16563 16351 16351 18332  LL     *vm page  0xcce93480 lynx
16460 16451 16460 18332  Ss      wait     0xc8ebb218 bash
16451 11589 11589 18332  S       piperd   0xd264a198 crond
16360 16345 16345 37174  SL      vnread   0xdc14e7f0 php
16351 16343 16351 18332  Ss      wait     0xc9236c90 bash
16349 16340 16349 10346  Ss      wait     0xce3f3218 bash
16345 16337 16345 37174  Ss      wait     0xcf6b1860 bash
16343 11589 11589 18332  S       piperd   0xca389990 crond
16340 11589 11589 10346  S       piperd   0xcce447f8 crond
16337 11589 11589 37174  S       piperd   0xcc6fb198 crond
15996 37504 37504 27220  S       select   0xc0a56dc4 httpd
15611 15608 15561     0  S       piperd   0xd222f4c8 awk


-- 
wbr,
pluknet