re: Current port status

i've had a new crash.  i saw it with a 5.99.65 kernel and a
very -current kernel, when trying to read a new kernel over NFS
from the build machine:

panic: kernel diagnostic assertion "cur->pcg_avail == cur->pcg_size" failed: file
"/usr/src/sys/kern/subr_pool.c", line 2573
Stopped in pid 0.45 (system) at netbsd:cpu_Debugger+0x10:       lwz     r0, 0x14(r1)
db> bt
0xaa45bc90: at vpanic+0x21c
0xaa45bcc0: at kern_assert+0x68
0xaa45bd00: at pool_cache_put_slow+0x30c
0xaa45bd30: at pool_cache_put_paddr+0x18c
0xaa45bd60: at m_ext_free+0xf0
0xaa45bd70: at m_freem+0xd4
0xaa45bda0: at nfs_readrpc+0x3ec
0xaa45be30: at nfs_doio+0x694
0xaa45bee0: at nfssvc_iod+0x1c4
0xaa45bf20: at cpu_lwp_bootstrap+0xc
saved LR(0x2) is invalid.

not much idea about it yet.  the assert means that because
we've taken the slow path, the cache should be full.  100%
repeatable for me.

.mrg.