panic under NFS load

Hey,

Running current as of yesterday (userland and kernel) and
transferring between 
two xen3 domus, the NFS server tips over with the below:

db> bt
cpu_Debugger(c03eddd8,caedb6e8,caedb6dc,c036d704,0) at
netbsd:cpu_Debugger+0x4
panic(c0412fc8,c03dc6a4,c03e54f5,c03e5470,24c) at
netbsd:panic+0x155
__assert(c03dc6a4,c03e5470,24c,c03e54f5,c0650660) at
netbsd:__assert+0x2e
ubc_release(ca8c0000,6,caedba88,caedb7ac,0) at
netbsd:ubc_release+0x2a2
ubc_uiomove(cb5a9840,caedba88,4000,6,0) at
netbsd:ubc_uiomove+0xf9
ffs_write(caedb8e8,30000,c0877600,100,136) at
netbsd:ffs_write+0x920
VOP_WRITE(cb5a9840,caedba88,80,cb095544,caeb2940) at
netbsd:VOP_WRITE+0x31
nfsrv_write(cb1e4d5c,c076f400,caeb2940,caedbb24,3) at
netbsd:nfsrv_write+0x92d
nfssvc_nfsd(caedbb74,804a2e0,caeb2940,0,0) at
netbsd:nfssvc_nfsd+0x183
sys_nfssvc(caeb2940,caedbc48,caedbc68,bbb06234,bbb06000) at

netbsd:sys_nfssvc+0x
308
syscall_plain() at netbsd:syscall_plain+0xb9
--- syscall (number 155) ---
0xbbb0623b:
db> 

Let me know if there is anything else I can provide.

Sarton

> Hey,
> 
> Running current as of yesterday (userland and kernel)
and transferring between 
> two xen3 domus, the NFS server tips over with the
below:
> 
> db> bt
> cpu_Debugger(c03eddd8,caedb6e8,caedb6dc,c036d704,0) at
netbsd:cpu_Debugger+0x4
> panic(c0412fc8,c03dc6a4,c03e54f5,c03e5470,24c) at
netbsd:panic+0x155
> __assert(c03dc6a4,c03e5470,24c,c03e54f5,c0650660) at
netbsd:__assert+0x2e
> ubc_release(ca8c0000,6,caedba88,caedb7ac,0) at
netbsd:ubc_release+0x2a2
> ubc_uiomove(cb5a9840,caedba88,4000,6,0) at
netbsd:ubc_uiomove+0xf9
> ffs_write(caedb8e8,30000,c0877600,100,136) at
netbsd:ffs_write+0x920
> VOP_WRITE(cb5a9840,caedba88,80,cb095544,caeb2940) at
netbsd:VOP_WRITE+0x31
> nfsrv_write(cb1e4d5c,c076f400,caeb2940,caedbb24,3) at
netbsd:nfsrv_write+0x92d
> nfssvc_nfsd(caedbb74,804a2e0,caeb2940,0,0) at
netbsd:nfssvc_nfsd+0x183
>
sys_nfssvc(caeb2940,caedbc48,caedbc68,bbb06234,bbb06000) at

> netbsd:sys_nfssvc+0x
> 308
> syscall_plain() at netbsd:syscall_plain+0xb9
> --- syscall (number 155) ---
> 0xbbb0623b:
> db> 
> 
> Let me know if there is anything else I can provide.
> 
> Sarton

which assertion was it?

YAMAMOTO Takashi

On Fri, 22 Jun 2007 12:02:29 pm YAMAMOTO Takashi wrote:
> > Hey,
> >
> > Running current as of yesterday (userland and
kernel) and transferring
> > between two xen3 domus, the NFS server tips over
with the below:
> >
> > db> bt
> >
cpu_Debugger(c03eddd8,caedb6e8,caedb6dc,c036d704,0) at
> > netbsd:cpu_Debugger+0x4
panic(c0412fc8,c03dc6a4,c03e54f5,c03e5470,24c) at
> > netbsd:panic+0x155
__assert(c03dc6a4,c03e5470,24c,c03e54f5,c0650660) at
> > netbsd:__assert+0x2e
ubc_release(ca8c0000,6,caedba88,caedb7ac,0) at
> > netbsd:ubc_release+0x2a2
ubc_uiomove(cb5a9840,caedba88,4000,6,0) at
> > netbsd:ubc_uiomove+0xf9
ffs_write(caedb8e8,30000,c0877600,100,136) at
> > netbsd:ffs_write+0x920
VOP_WRITE(cb5a9840,caedba88,80,cb095544,caeb2940)
> > at netbsd:VOP_WRITE+0x31
> > nfsrv_write(cb1e4d5c,c076f400,caeb2940,caedbb24,3)
at
> > netbsd:nfsrv_write+0x92d
nfssvc_nfsd(caedbb74,804a2e0,caeb2940,0,0) at
> > netbsd:nfssvc_nfsd+0x183
> >
sys_nfssvc(caeb2940,caedbc48,caedbc68,bbb06234,bbb06000) at
> > netbsd:sys_nfssvc+0x
> > 308
> > syscall_plain() at netbsd:syscall_plain+0xb9
> > --- syscall (number 155) ---
> > 0xbbb0623b:
> > db>
> >
> > Let me know if there is anything else I can
provide.
> >
> > Sarton
>
> which assertion was it?

Sorry about that:

login: panic: kernel diagnostic assertion
"pgs[i]->loan_count == 0" failed: 
file "/usr/src/sys/uvm/uvm_bio.c", line 588
Stopped in pid 348.1 (nfsd) at  netbsd:cpu_Debugger+0x4:    
   popl    %ebp
db>

Sarton