panic: pmap_growkernel: no memory to grow kernel

[Andrea Venturoli]

Hello.

This night a 14.2-RELEASE-p3/amd64 server of mine rebooted itself.
Unfortunately I got no core, but I have the following in the logs:

> Jun 4 03:06:19 xxxxxx kernel: panic: pmap_growkernel: no memory to grow kernel
> Jun 4 03:06:19 xxxxxx kernel: cpuid = 4
> Jun 4 03:06:19 xxxxxx kernel: time = 1748999063
> Jun 4 03:06:19 xxxxxx kernel: KDB: stack backtrace:
> Jun 4 03:06:19 xxxxxx kernel: #0 0xffffffff8063243d at kdb_backtrace+0x5d
> Jun 4 03:06:19 xxxxxx kernel: #1 0xffffffff805e8ad1 at vpanic+0x131
> Jun 4 03:06:19 xxxxxx kernel: #2 0xffffffff805e8993 at panic+0x43
> Jun 4 03:06:19 xxxxxx kernel: #3 0xffffffff808f7803 at pmap_growkernel+0x2a3
> Jun 4 03:06:19 xxxxxx kernel: #4 0xffffffff8086e8e4 at vm_map_insert1+0x254
> Jun 4 03:06:19 xxxxxx kernel: #5 0xffffffff8087024c at vm_map_find_locked+0x50c
> Jun 4 03:06:19 xxxxxx kernel: #6 0xffffffff8086fc2f at vm_map_find+0xaf
> Jun 4 03:06:19 xxxxxx kernel: #7 0xffffffff8086cd66 at kva_import+0x36
> Jun 4 03:06:19 xxxxxx kernel: #8 0xffffffff8064fa7e at vmem_try_fetch+0xce
> Jun 4 03:06:19 xxxxxx kernel: #9 0xffffffff8064f3e8 at vmem_xalloc+0x578
> Jun 4 03:06:19 xxxxxx kernel: #10 0xffffffff8086cdb5 at kva_import_domain+0x25
> Jun 4 03:06:19 xxxxxx kernel: #11 0xffffffff8064fa7e at vmem_try_fetch+0xce
> Jun 4 03:06:19 xxxxxx kernel: #12 0xffffffff8064f3e8 at vmem_xalloc+0x578
> Jun 4 03:06:19 xxxxxx kernel: #13 0xffffffff8064ee17 at vmem_alloc+0x37
> Jun 4 03:06:19 xxxxxx kernel: #14 0xffffffff8086c3f5 at kmem_malloc_domainset+0x95
> Jun 4 03:06:19 xxxxxx kernel: #15 0xffffffff8086295d at keg_alloc_slab+0xad
> Jun 4 03:06:19 xxxxxx kernel: #16 0xffffffff80864780 at zone_import+0xe0
> Jun 4 03:06:19 xxxxxx kernel: #17 0xffffffff80860d92 at zone_alloc_item+0x72


Any idea?
What does this mean? Where to look for further info?
Is this a known problem?

bye & Thanks
av.