Date: Sat, 20 May 2000 00:29:42 +0200 (CEST) From: Thomas Faehnle <tf@wurbl.wn.bawue.de> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/18685: "vinum start" under load causes "Fatal trap 12" Message-ID: <E12svMk-0000xB-00@wurbl.bk.int>
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>Number: 18685
>Category: kern
>Synopsis: "vinum start" under load causes "Fatal trap 12"
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri May 19 17:00:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Thomas Faehnle
>Release: FreeBSD 4.0-STABLE i386
>Organization:
Multisys GbR
>Environment:
4.0-STABLE, tracked up to CTM patch src-4.0077
>Description:
Starting the vinum subsystem ("vinum start") on a loaded machine
causes a "Fatal trap 12: page fault while in kernel mode".
DDB output follows:
,--------------------
| Fatal trap 12: page fault while in kernel mode
| fault virtual address = 0x69666f27
| fault code = supervisor read, page not present
| instruction pointer = 0x8:0xc0158c14
| stack pointer = 0x10:0xc3dd7bf8
| frame pointer = 0x10:0xc3dd7c0c
| 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 = 974 (make)
| interrupt mask = none
| kernel: type 12 trap, code=0
| Stopped at dscheck+0x104: movl 0xb8(%esi),%edx
|
| db> trace
| dscheck(c1413728,c08c6900) at dscheck+0x104
| diskstrategy(c1413728,c0845e80,c1413728,0,c3dd7c4c) at diskstrategy+0xad
| spec_strategy(c3dd7c70,c3dd7c58,c0208f7d,c3dd7c70,c3dd7c8c) at spec_strategy+0x8c
| spec_vnoperate(c3dd7c70,c3dd7c8c,c02089e5,c3dd7c70,c3dd7ce4) at spec_vnoperate+0x15
| ufs_vnoperatespec(c3dd7c70,c3dd7ce4,c1413728,0,c028ae80) at ufs_vnoperatespec+0x15
| ufs_strategy(c3dd7cb0,c3dd7cbc,c017114a,c3dd7cb0,c08d2400) at ufs_strategy+0xc5
| ufs_vnoperate(c3dd7cb0) at ufs_vnoperate+0x15
| bread(c3df7540,0,400,0,c3dd7ce4) at bread+0x8e
| ffs_blkatoff(c3df7540,0,0,0,c3dd7d64) at ffs_blkatoff+0x83
| ufs_lookup(c3dd7db4,c3dd7dc8,c0174c51,c3dd7db4,c3dbe806) at ufs_lookup+0x1ed
| ufs_vnoperate(c3dd7db4,c3dbe806,c3df7540,c3dd7eac,c3dd7dbc) at ufs_vnoperate+0x15
| vfs_cache_lookup(c3dd7e08,c3dd7e18,c0177848,c3dd7e08,c3df7540) at vfs_cache_lookup+0x251
| ufs_vnoperate(c3dd7e08,c3df7540,c0993900,c3dd7eac,c3b0ca00) at ufs_vnoperate+0x15
| lookup(c3dd7e84,c3b0ca00,c3b0ca00,c3dd7f80,c3b0ca00) at lookup+0x284
| namei(c3dd7e84,c3b0ca00,2,c3dd7f80,8072d90) at namei+0x178
| stat(c3b0ca00,c3dd7f80,8072d90,0,8074600) at stat+0x41
| syscall2(2f,2f,2f,8074600,0) at syscall2+0x1f1
| Xint0x80_syscall() at Xint0x80_syscall+0x26
|
| db> ps
| pid proc addr uid ppid pgrp flag stat wmesg wchan cmd
| 1090 c3def740 c3e5b000 0 1 1090 000204 3 vinum c09bcb90 vinum
| 1084 c3df0e00 c3df1000 0 208 1084 004006 2 vinum
| 974 c3b0ca00 c3dd6000 0 662 628 004006 2 make
| 662 c3df0ac0 c3df4000 0 659 628 004086 3 wait c3df0ac0 sh
| 659 c3b0c6c0 c3ddc000 0 639 628 004486 2 make
| 639 c3b0d220 c3dc2000 0 636 628 004086 3 wait c3b0d220 sh
| 636 c3b0cd40 c3dca000 0 635 628 004486 2 make
| 635 c3b0cee0 c3dc8000 0 628 628 004086 3 wait c3b0cee0 sh
| 628 c3b0d080 c3dc4000 0 207 628 004486 2 make
| 214 c3b0d3c0 c3dba000 0 1 214 004086 3 ttyin c085f410 getty
| 213 c3b0d560 c3db6000 0 1 213 004086 3 ttyin c085f610 getty
| 212 c3b0d700 c3db3000 0 1 212 004086 3 ttyin c085f710 getty
| 211 c3b0dbe0 c3da4000 0 1 211 004086 3 ttyin c085f810 getty
| 210 c3b0d8a0 c3dab000 0 1 210 004086 3 ttyin c085f910 getty
| 209 c3b0dd80 c3da1000 0 1 209 004086 3 ttyin c085fa10 getty
| 208 c3b0e740 c3d8c000 0 1 208 004086 3 wait c3b0e740 bash
| 207 c3b0f5e0 c3d65000 0 1 207 004086 3 wait c3b0f5e0 bash
| 192 c3b0da40 c3da7000 0 1 192 000084 3 select c02c1dec moused
| 161 c3b0df20 c3d9d000 0 1 161 000584 2 sendmail
| 158 c3b0e0c0 c3d9a000 0 1 158 000484 2 cron
| 156 c3b0e260 c3d96000 0 1 156 000084 3 select c02c1dec inetd
| 140 c3b0e400 c3d92000 0 1 140 000084 3 select c02c1dec rpc.statd
| 138 c3b0e5a0 c3d8f000 0 1 138 000084 3 select c02c1dec rpc.lockd
| 136 c3b0e8e0 c3d89000 0 132 132 000084 3 nfsd c0827200 nfsd
| 135 c3b0ea80 c3d86000 0 132 132 000084 3 nfsd c07f3200 nfsd
| 134 c3b0ec20 c3d83000 0 132 132 000084 3 nfsd c0827000 nfsd
| 133 c3b0f440 c3d68000 0 132 132 000084 3 nfsd c07f3000 nfsd
| 132 c3b0edc0 c3d80000 0 1 132 000084 3 accept c39e39f6 nfsd
| 130 c3b0ef60 c3d7d000 0 1 130 000084 3 select c02c1dec mountd
| 125 c3b0f100 c3d72000 1 1 125 000184 3 select c02c1dec portmap
| 119 c3b0f2a0 c3d6f000 0 1 119 000084 2 syslogd
| 5 c3b0f780 c3b1c000 0 0 0 000204 2 syncer
| 4 c3b0f920 c3b1a000 0 0 0 100604 2 bufdaemon
| 3 c3b0fac0 c3b18000 0 0 0 000204 3 psleep c02b9380 vmdaemon
| 2 c3b0fc60 c3b16000 0 0 0 100604 2 pagedaemon
| 1 c3b0fe00 c3b14000 0 0 1 004284 3 wait c3b0fe00 init
| 0 c02c1180 c0327000 0 0 0 000204 3 sched c02c1180 swapper
| 1089 c3ded1e0 c3ed9000 0 1084 1084 002006 5 vinum
| db>
`--------------------
Vinum configuration follows:
,--------------------
| 3 drives:
| D d0 State: up Device /dev/da0s2e Avail: 14539/15539 MB (93%)
| D d1 State: up Device /dev/da1s2e Avail: 14539/15539 MB (93%)
| D d2 State: up Device /dev/da2s2e Avail: 14539/15539 MB (93%)
|
| 1 volumes:
| V raid State: up Plexes: 1 Size: 2000 MB
|
| 1 plexes:
| P raid.p0 R5 State: up Subdisks: 3 Size: 2000 MB
|
| 3 subdisks:
| S raid.p0.s0 State: up PO: 0 B Size: 1000 MB
| S raid.p0.s1 State: up PO: 256 kB Size: 1000 MB
| S raid.p0.s2 State: up PO: 512 kB Size: 1000 MB
`--------------------
>How-To-Repeat:
Generate some load (I did a "make -j 30 buildworld" on
a i586/133MHz/32MB machine). Type "vinum start" to activate
vinum with an existing configuration.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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