panic: kmem_slab_alloc(): kernel_map ran out of space!

Peter Avalos pavalos at
Fri Jan 15 05:56:41 PST 2010

Perhaps related to

I just got a panic tonight:
Reading symbols from /home/var.crash/kern.27...done.

Unread portion of the kernel message buffer:
panic: kmem_slab_alloc(): kernel_map ran out of space!
mp_lock = 00000001; cpuid = 1
Trace beginning at frame 0xf23d5ae0
panic(f23d5b04,f47209f0,20000,102,f23d5b24) at panic+0x14d
panic(c0385830,0,4000,20000,4) at panic+0x14d
kmem_slab_alloc(0,ab,ff808000,9,50) at kmem_slab_alloc+0x159
kmalloc(4c,c03b84a0,102,0,f23d5c7c) at kmalloc+0x628
cache_alloc(0,0,db59cd60,daeac918,ff808000) at cache_alloc+0x18
cache_nlookup(f23d5c7c,f23d5bd8,f23d5c7c,f23d5c7c,0) at
nlookup(f23d5c7c,0,f23d5c7c,1,f23d5cc0) at nlookup+0x23b
kern_stat(f23d5c7c,f23d5c14,1d6741,0,1) at kern_stat+0xf
sys_lstat(f23d5cf0,6,246ebe,0,f255b558) at sys_lstat+0xad
syscall2(f23d5d40) at syscall2+0x3eb
Xint0x80_syscall() at Xint0x80_syscall+0x36
boot() called on cpu#1
Uptime: 8h16m54s
Physical memory: 2043 MB
Dumping 368 MB: 353 337 321 305 289 273 257 241 225 209 193 177 161 145
129 113 97 81 65 49 33 17 1

_get_mycpu (di=0xc044e140) at ./machine/thread.h:83
83          __asm ("movl %%fs:globaldata,%0" : "=r" (gd) :
(kgdb) bt
#0  _get_mycpu (di=0xc044e140) at ./machine/thread.h:83
#1  md_dumpsys (di=0xc044e140) at
#2  0xc01c5bbe in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:838
#3  0xc01c6190 in boot (howto=260) at
#4  0xc01c66ee in panic (fmt=0xc0385830 "kmem_slab_alloc(): kernel_map
ran out of space!") at /usr/src/sys/kern/kern_shutdown.c:744
#5  0xc01c31c8 in kmem_slab_alloc (size=131072, align=131072, flags=258)
at /usr/src/sys/kern/kern_slaballoc.c:1139
#6  0xc01c4385 in kmalloc (size=80, type=0xc03b84a0, flags=<value
optimized out>) at /usr/src/sys/kern/kern_slaballoc.c:658
#7  0xc02119cb in cache_alloc (nlen=0) at
#8  0xc0213e2d in cache_nlookup (par_nch=0xf23d5c7c, nlc=0xf23d5bd8) at
#9  0xc021d4ce in nlookup (nd=0xf23d5c7c) at
#10 0xc02253d2 in kern_stat (nd=0xf23d5c7c, st=0xf23d5c14) at
#11 0xc022af9d in sys_lstat (uap=0xf23d5cf0) at
#12 0xc033f6c9 in syscall2 (frame=0xf23d5d40) at
#13 0xc032a6e6 in Xint0x80_syscall () at
#14 0x0000001f in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

The end of kmapinfo's output:
Total empty space:     184K
Total used  space: 1048392K

Indeed it appears to be out of memory.  Are 32-bit users hosed?

Kernel and core are being uploaded to leaf:~pavalos/crash/*27

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