On Thu, Aug 18, 2011 at 3:25 PM, Clinton Adams clinton.ad...@gmail.com wrote:
Hello,
Kernel panics if clients hit the nfs server sufficiently hard -
happens repeatedly with 13 clients logging in at the same approximate
time, using nfsv4 mounted homes.
server is running freebsd 8.2-RELEASE-p2. clients are linux 2.6.38-10
Running a memtest on the server now to rule out bad mem. The server
has been used for samba, and it's only with the attempted switch to
nfs that this problem has appeared.
Err, wrong paste from another forum. Here's the trace from my server:
Fatal trap 12: page fault while in kernel mode
Fatal trap 12: page fault while in kernel mode
cpuid = 0;
cpuid = 2; apic id = 00apic id = 06
fault virtual address = 0x0
fault virtual address = 0x8
fault code = supervisor write data, page not present
fault code = supervisor read data, page not present
instruction pointer = 0x20:0x807db856
instruction pointer = 0x20:0x807dc0d7
stack pointer = 0x28:0xff8096c0d840
stack pointer = 0x28:0xff8096c17860
frame pointer = 0x28:0xff8096c0d860
frame pointer = 0x28:0xff8096c17a80
code segment= base 0x0, limit 0xf, type 0x1b
code segment= base 0x0, limit 0xf, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags=
processor eflags= interrupt enabled, interrupt enabled,
resume, resume, IOPL = 0IOPL = 0
current process =
current process = 765 (nfsd: service)765 (nfsd: service)
trap number = 12
trap number = 12
panic: page fault
cpuid = 1
Uptime: 3h22m48s
Physical memory: 2032 MB
Dumping 406 MB: 391 375 359 343 327 311 295 279 263 247 231 215
199 183 167 151 135 119 103 87 71 55 39 23 7
Reading symbols from /boot/kernel/linux.ko...done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/kernel/nfscommon.ko...done.
Loaded symbols for /boot/kernel/nfscommon.ko
Reading symbols from /boot/kernel/nfsd.ko...done.
Loaded symbols for /boot/kernel/nfsd.ko
Reading symbols from /boot/kernel/snp.ko...done.
Loaded symbols for /boot/kernel/snp.ko
#0 doadump () at pcpu.h:224
224 __asm(movq %%gs:0,%0 : =r (td));
(kgdb) list *0x807db856
0x807db856 is in svc_rpc_gss_forget_client
(/usr/src/sys/rpc/rpcsec_gss/svc_rpcsec_gss.c:622).
617 struct svc_rpc_gss_client_list *list;
618
619 list =
svc_rpc_gss_client_hash[client-cl_id.ci_id % CLIENT_HASH_SIZE];
620 sx_xlock(svc_rpc_gss_lock);
621 TAILQ_REMOVE(list, client, cl_link);
622 TAILQ_REMOVE(svc_rpc_gss_clients, client, cl_alllink);
623 svc_rpc_gss_client_count--;
624 sx_xunlock(svc_rpc_gss_lock);
625 svc_rpc_gss_release_client(client);
626 }
(kgdb) backtrace
#0 doadump () at pcpu.h:224
#1 0x805cbabe in boot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:419
#2 0x805cbed3 in panic (fmt=0x0) at
/usr/src/sys/kern/kern_shutdown.c:592
#3 0x808d239d in trap_fatal (frame=0xff0004c89460,
eva=Variable eva is not available.
) at /usr/src/sys/amd64/amd64/trap.c:783
#4 0x808d275f in trap_pfault (frame=0xff8096c0d790,
usermode=0) at /usr/src/sys/amd64/amd64/trap.c:699
#5 0x808d2b5f in trap (frame=0xff8096c0d790) at
/usr/src/sys/amd64/amd64/trap.c:449
#6 0x808bada4 in calltrap () at
/usr/src/sys/amd64/amd64/exception.S:224
#7 0x807db856 in svc_rpc_gss_forget_client
(client=0xff001c015200) at atomic.h:158
#8 0x807dc0e3 in svc_rpc_gss (rqst=0xff0004a24000,
msg=0xff8096c0db20) at
/usr/src/sys/rpc/rpcsec_gss/svc_rpcsec_gss.c:642
#9 0x807d48f3 in svc_run_internal
(pool=0xff0004ca6200, ismaster=0) at /usr/src/sys/rpc/svc.c:837
#10 0x807d50ab in svc_thread_start (arg=Variable arg is
not available.
) at /usr/src/sys/rpc/svc.c:1200
#11 0x805a26f8 in fork_exit (callout=0x807d50a0
svc_thread_start, arg=0xff0004ca6200, frame=0xff8096c0dc40)
at /usr/src/sys/kern/kern_fork.c:845
#12 0x808bb26e in fork_trampoline () at
/usr/src/sys/amd64/amd64/exception.S:565
#13 0x0080 in ?? ()
#14 0x7fffe6e0 in ?? ()
#15 0x002e in ?? ()
#16 0x in ?? ()
#17 0xfef4 in ?? ()
#18 0x in ?? ()
#19 0x009b in ?? ()
#20 0x7fffe6e0 in ?? ()
#21 0x0008 in ?? ()
#22 0x0003 in ?? ()
#23 0x in ?? ()
