Date: 07 May 2002 06:38:01 -0400 From: Dan Pelleg <dpelleg+bsd@cs.cmu.edu> To: stable@freebsd.org Subject: 4.5R: page fault - nfs related? Message-ID: <u2sd6w8jl9y.fsf@gs166.sp.cs.cmu.edu>
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I've been getting the occasional panic on this NFS server. They would
happen once a week or two, and seem to be correlated with heavy NFS
activity. Recovering from such a crash takes a long fsck and creates lots
of pieces in lost+found. It's running 4.5-RELEASE-p3, softupdates, quota.
Last night it happened again, and, for the first time, I finally have a
crash dump I can use. However I'm not sure what to do here. What should I
be looking at?
--
Dan Pelleg
IdlePTD at phsyical address 0x0046c000
initial pcb at physical address 0x003c24c0
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc02a795a
stack pointer = 0x10:0xed6939c4
frame pointer = 0x10:0xed693a14
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 99 (nfsd)
interrupt mask = none
trap number = 12
panic: page fault
syncing disks... 7 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
giving up on 3 buffers
Uptime: 18d0h54m26s
(da2:ahc1:0:0:0): SYNCHRONIZE CACHE. CDB: 35 0 0 0 0 0 0 0 0 0
(da2:ahc1:0:0:0): ILLEGAL REQUEST asc:20,0
(da2:ahc1:0:0:0): Invalid command operation code
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:474
474 if (dumping++) {
(kgdb) where
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:474
#1 0xc01aa4eb in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:313
#2 0xc01aa8cc in poweroff_wait (junk=0xc0355d8c, howto=-1070245713)
at /usr/src/sys/kern/kern_shutdown.c:582
#3 0xc02f882a in trap_fatal (frame=0xed693984, eva=0)
at /usr/src/sys/i386/i386/trap.c:956
#4 0xc02f84fd in trap_pfault (frame=0xed693984, usermode=0, eva=0)
at /usr/src/sys/i386/i386/trap.c:849
#5 0xc02f80e7 in trap (frame={tf_fs = -311885808, tf_es = -749993968,
tf_ds = 16, tf_edi = -311935296, tf_esi = -960925048,
tf_ebp = -311870956, tf_isp = -311871056, tf_ebx = -956628416,
tf_edx = 0, tf_ecx = -959221760, tf_eax = 0, tf_trapno = 12, tf_err = 2,
tf_eip = -1070958246, tf_cs = 8, tf_eflags = 66118, tf_esp = -901289984,
tf_ss = -287237312}) at /usr/src/sys/i386/i386/trap.c:448
#6 0xc02a795a in dqget (vp=0xeee11b40, id=100, ump=0xc6d45000, type=1,
dqp=0xca476848) at /usr/src/sys/ufs/ufs/ufs_quota.c:763
#7 0xc02a6d9f in getinoquota (ip=0xca476800)
at /usr/src/sys/ufs/ufs/ufs_quota.c:104
#8 0xc02aab94 in ufs_makeinode (mode=33204, dvp=0xef3e5200, vpp=0xed693c60,
cnp=0xed693c74) at /usr/src/sys/ufs/ufs/ufs_vnops.c:2168
#9 0xc02a81e8 in ufs_create (ap=0xed693bf8)
at /usr/src/sys/ufs/ufs/ufs_vnops.c:196
#10 0xc02aae9d in ufs_vnoperate (ap=0xed693bf8)
at /usr/src/sys/ufs/ufs/ufs_vnops.c:2423
#11 0xc0227ba7 in nfsrv_create (nfsd=0xca669f00, slp=0xc7023700,
procp=0xe5b320c0, mrq=0xed693df8) at vnode_if.h:106
#12 0xc023c7e6 in nfssvc_nfsd (nsd=0xed693e58, argp=0x807cc00 "", p=0xe5b320c0)
at /usr/src/sys/nfs/nfs_syscalls.c:602
#13 0xc023c13b in nfssvc (p=0xe5b320c0, uap=0xed693f80)
at /usr/src/sys/nfs/nfs_syscalls.c:306
#14 0xc02f8ad9 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47,
tf_edi = 0, tf_esi = 0, tf_ebp = -1077936788, tf_isp = -311869484,
tf_ebx = 4, tf_edx = 1, tf_ecx = -3, tf_eax = 155, tf_trapno = 12,
tf_err = 2, tf_eip = 134518288, tf_cs = 31, tf_eflags = 647,
tf_esp = -1077937216, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1157
#15 0xc02ed145 in Xint0x80_syscall ()
#16 0x8048135 in ?? ()
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