panic: nfssvc_nfsd(): debug.mpsafenet=1 && Giant

Hi,

I'm getting the following panic on 6-CURRENT as well as 5.3-BETA1 with
sources from today.  It's easily reproducible on both, with
debug.mpsafenet=1.

Crashdumps and debugging kernels available for both.

panic: nfssvc_nfsd(): debug.mpsafenet=1 && Giant
cpuid = 0
KDB: enter: panic
[thread 100102]
Stopped at      kdb_enter+0x2b: nop
db> tr
kdb_enter(c06e619b) at kdb_enter+0x2b
panic(c06fbcc1,c0515fd4,0,2,2) at panic+0x125
nfssvc_nfsd(c1c37420,c06e5488,121,c202b22c,c202b1c0) at
nfssvc_nfsd+0x77e
nfssvc(c1c37420,d8908d14,2,1,292) at nfssvc+0x1ac
syscall(2f,2f,2f,bfbfecd8,0) at syscall+0x22b
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (155, FreeBSD ELF32, nfssvc), eip = 0x280d02ef, esp =
0xbfbfe92c, ebp = 0xbfbfe948 ---
db> show locks
exclusive sleep mutex nfsd_mtx r = 0 (0xc078dee0) locked _at_
/usr/home/build/src/sys/nfsserver/nfs_syscalls.c:
510
exclusive sleep mutex Giant r = 1 (0xc074c100) locked _at_
/usr/home/build/src/sys/nfsserver/nfs_serv.c:2693
db>


- Christian

-- 
Christian Brueffer	chris_at_unixpages.org	brueffer_at_FreeBSD.org
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