Date: Thu, 4 Feb 1999 16:32:30 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Bernd Walter <ticso@cicely.de> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Panic with 3.0-Stable SNAP 1999-02-02 Message-ID: <199902050032.QAA91774@apollo.backplane.com> References: <19990203192504.35970@cicely.de> <199902040017.QAA76195@apollo.backplane.com> <19990204083333.36857@cicely.de>
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:Fatal trap 12: page fault while in kernel mode
:fault virtual address = 0x0
:...
:interrupt mask = bio
:trap number = 12
:panic: page fault
:...
:(kgdb) print *kernel_map
:$1 = {lock = {lk_interlock = {lock_data = -266052716}, lk_flags = 16777216,
: lk_sharecount = 0, lk_waitcount = 0, lk_exclusivecount = 0, lk_prio = 4,
: lk_wmesg = 0xf0207601 "thrd_sleep", lk_timo = 0, lk_lockholder = -1},
: header = {prev = 0xf024255c, next = 0xf0243524, start = 4026265600,
: end = 4290772992, avail_ssize = 0, object = {vm_object = 0x0,
: share_map = 0x0, sub_map = 0x0}, offset = 0x0000000000000000,
: eflags = 0 '\000', protection = 0 '\000', max_protection = 0 '\000',
: inheritance = 0 '\000', wired_count = 0}, nentries = 101,
: size = 264495104, is_main_map = 1 '\001', system_map = 1 '\001',
: hint = 0xf0243434, timestamp = 4475, first_free = 0xf024255c,
: pmap = 0xf0253648}
:...
:Yes I have got a dump showing me that allocation to kernel_map failed.
:Thats why I CCed to you because I know your are very responsible about the VM system
:Unlukily I don't have this special dump.
:I forgot to mention that I've raised some values in sys/vm/vm_map.h beacuse of the first dumps:
:/* XXX: number of kernel maps and entries to statically allocate */
Well, I'm not sure why your 'print *z' failed - z can't be NULL
here so it's probably gdb tripping over a compiler optimization.
The vnode_zone is not flagged ZONE_INTERRUPT. The kernel_map's lock wasn't
taken, so _zget() should have called kmem_alloc().
The kmem_alloc() must be failing, but I don't see where and I don't know
why.
:original:
:/* XXX: number of kernel maps and entries to statically allocate */
:#define MAX_KMAP 10
:#define MAX_KMAPENT 128
:#define MAX_MAPENT 128
:Memory statistics by type Type Kern
: Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
: kld 4 1K 1K 40960K 5 0 0 16,32,128
: timecounter 10 2K 2K 40960K 10 0 0 128
: file desc 75 31K 35K 40960K 8803 0 0 128,256,512,1K,2K
: file 395 25K 29K 40960K 169149 0 0 64
: sigio 1 1K 1K 40960K 2 0 0 32
: zombie 0 0K 1K 40960K 8695 0 0 128
: lockf 1 1K 1K 40960K 93 0 0 64
: namecache 2602 420K 420K 40960K 10334 0 0 64,128,256,256K
: devbuf 782 302K 302K 40960K 1769 0 0 16,32,64,128,256,512,1K,2K,4K,16K,32K
: temp 23 138K 168K 40960K 234285 0 0 16,32,64,256,512,1K,2K,4K,256K
: pgrp 32 1K 2K 40960K 56 0 0 32
: session 25 2K 2K 40960K 33 0 0 64
: proc 7 19K 19K 40960K 8 0 0 16,2K,8K
: subproc 135 7K 7K 40960K 17534 0 0 32,256
: cred 31 4K 5K 40960K 66 0 0 128
: sysctl 0 0K 1K 40960K 13 0 0 16,32
: ioctlops 0 0K 1K 40960K 10 0 0 512
: ttys 251 36K 36K 40960K 489 0 0 128,2K
: soname 1 1K 1K 40960K 148515 0 0 16,128
: pcb 573 14K 20K 40960K 40347 0 0 16,32,64,2K
: BIO buffer 19 20K 78K 40960K 399 0 0 512,1K,2K
:cluster_save buffer 0 0K 1K 40960K 211 0 0 32,64
: mount 11 6K 6K 40960K 11 0 0 512
: vnodes 43 6K 7K 40960K 996 0 0 16,32,64,128,256
: ifaddr 11 1K 1K 40960K 11 0 0 32,64,128
: ether_multi 7 1K 1K 40960K 7 0 0 16,32
: routetbl 6359 894K 894K 40960K 6369 0 0 16,32,64,128,256
: in_multi 2 1K 1K 40960K 2 0 0 32
: NFS srvsock 2 1K 1K 40960K 2 0 0 256
: NFS daemon 1 1K 1K 40960K 1 0 0 256
: NQNFS Lease 1 1K 1K 40960K 1 0 0 1K
: NFS hash 1 128K 128K 40960K 1 0 0 128K
: FFS node 15230 3808K 3808K 40960K 16777 0 0 256
: MFS node 1 1K 1K 40960K 10 0 0 64,256
: UFS ihash 1 128K 128K 40960K 1 0 0 128K
: UFS mount 30 83K 83K 40960K 30 0 0 512,2K,4K,8K
: VM pgdata 1 544K 544K 40960K 1 0 0 512K
: ZONE 18 3K 3K 40960K 18 0 0 128
: mbuf 1 12K 12K 40960K 1 0 0 16K
:
:Memory Totals: In Use Free Requests
: 6627K 86K 665065
:
:...
:> :
:> :The Errors are are all resultion with the same trigger.
:> :Running squid and doing several lookups with wget.
:> :I have tried a current SNAP 1999-01-12
:> :and tried the Stable-SNAP 1999-02-02 with the same problems.
:> :...
:....
:> :#5 0xf01ea7a7 in generic_bzero ()
:> :#6 0xf015e6d8 in getnewvnode (tag=VT_UFS, mp=0xf2734e00, vops=0xf2667300,
:> : vpp=0xff5e6c7c) at ../../vm/vm_zone.h:85
This is a kernel map full failure too.
The problem should be clear from the vmstat and it isn't... the vmstat
looks quite normal.
Try running netstat on the cores the same way you ran vmstat.
netstat -tn -M vmcore.6 -N kernel.6
netstat -s -M vmcore.6 -N kernel.6
netstat -m -M vmcore.6 -N kernel.6
: B.Walter
-Matt
Matthew Dillon
<dillon@backplane.com>
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