panic: kmem_malloc(4096) on an SMP box

  Today we have evidenced a panic on a DELL PowerEdge 1400
with two processors on board:

panic: kmem_malloc(4096): kmem_map too small: 209715200 total allocated
cpuid = 0; 

I have dump saved, so I'll be glad to feed anyone with information
to help fix this issue.

backtrace:
(kgdb) bt
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:236
#1  0xc0446a05 in db_fncall (dummy1=0, dummy2=0, dummy3=0, dummy4=0xdbd1a67c "")
    at /usr/src/sys/ddb/db_command.c:551
#2  0xc0446752 in db_command (last_cmdp=0xc06a3ea0, cmd_table=0x0, 
    aux_cmd_tablep=0xc0674b88, aux_cmd_tablep_end=0xc0674b8c)
    at /usr/src/sys/ddb/db_command.c:348
#3  0xc0446895 in db_command_loop () at /usr/src/sys/ddb/db_command.c:475
#4  0xc04499f5 in db_trap (type=3, code=0) at /usr/src/sys/ddb/db_trap.c:73
#5  0xc060e8cc in kdb_trap (type=3, code=0, regs=0xdbd1a7d0)
    at /usr/src/sys/i386/i386/db_interface.c:159
#6  0xc0623e28 in trap (frame=
      {tf_fs = -1068498920, tf_es = -1067057136, tf_ds = -1067122672, tf_edi = -1067022542, tf_esi = 1, tf_ebp = -607016932, tf_isp = -607016964, tf_ebx = 0, tf_edx = 0, tf_ecx = -1061076992, tf_eax = 18, tf_trapno = 3, tf_err = 0, tf_eip = -1067389995, tf_cs = 8, tf_eflags = 658, tf_esp = -1067002619, tf_ss = -1067087802})
    at /usr/src/sys/i386/i386/trap.c:579
#7  0xc060ebd5 in Debugger (msg=0x0) at machine/cpufunc.h:56
#8  0xc04e34b6 in panic (
    fmt=0xc0668732 "kmem_malloc(%ld): kmem_map too small: %ld total allocated")
    at /usr/src/sys/kern/kern_shutdown.c:532
#9  0xc05d2cbb in kmem_malloc (map=0xc0c3a0a0, size=4096, flags=258)
    at /usr/src/sys/vm/vm_kern.c:324
#10 0xc05e4367 in page_alloc (zone=0xc1ee9580, bytes=0, pflag=0x0, wait=0)
    at /usr/src/sys/vm/uma_core.c:892
#11 0xc05e3ffd in slab_zalloc (zone=0xc1ee9580, wait=258)
    at /usr/src/sys/vm/uma_core.c:789
#12 0xc05e570a in uma_zone_slab (zone=0xc1ee9580, flags=2)
    at /usr/src/sys/vm/uma_core.c:1772
#13 0xc05e594f in uma_zalloc_bucket (zone=0xc1ee9580, flags=2)
    at /usr/src/sys/vm/uma_core.c:1875
#14 0xc05e55ad in uma_zalloc_arg (zone=0xc1ee9580, udata=0x0, flags=2)
    at /usr/src/sys/vm/uma_core.c:1699
#15 0xc05bae4c in ffs_vget (mp=0xc1dfcc00, ino=3111815, flags=2, vpp=0xdbd1aa4c)
    at /usr/src/sys/vm/uma.h:270
#16 0xc05c2bb2 in ufs_lookup (ap=0xdbd1ab10) at /usr/src/sys/ufs/ufs/ufs_lookup.c:599
#17 0xc05c9d98 in ufs_vnoperate (ap=0x0) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2819
#18 0xc0535191 in vfs_cache_lookup (ap=0x0) at vnode_if.h:82
#19 0xc05c9d98 in ufs_vnoperate (ap=0x0) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2819
#20 0xc053a292 in lookup (ndp=0xdbd1ac28) at vnode_if.h:52
#21 0xc0539c7e in namei (ndp=0xdbd1ac28) at /usr/src/sys/kern/vfs_lookup.c:179
#22 0xc0546bd2 in lstat (td=0xc1d08840, uap=0xdbd1ad14)
    at /usr/src/sys/kern/vfs_syscalls.c:2059
#23 0xc06247b0 in syscall (frame=
      {tf_fs = 134545455, tf_es = 134545455, tf_ds = -1078001617, tf_edi = 134570496, tf_esi = 134570568, tf_ebp = -1077941080, tf_isp = -607015564, tf_ebx = 672438156, tf_edx = 134561792, tf_ecx = 134561792, tf_eax = 190, tf_trapno = 0, tf_err = 2, tf_eip = 671910239, tf_cs = 31, tf_eflags = 582, tf_esp = -1077941236, tf_ss = 47})
    at /usr/src/sys/i386/i386/trap.c:1004
#24 0x280c895f in ?? ()
---Can't read userspace from dump, or kernel process---

-- 
Totus tuus, Glebius.
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