Date: Tue, 07 Jan 1997 21:10:51 +1100 (EST) From: peter.jeremy@alcatel.com.au To: FreeBSD-gnats-submit@freebsd.org Subject: kern/2393: filesystems not unmounted following shutdown -h Message-ID: <199701071010.VAA03372@vk2pj.alcatel.com.au> Resent-Message-ID: <199701071020.CAA12440@freefall.freebsd.org>
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>Number: 2393
>Category: kern
>Synopsis: filesystems not unmounted following shutdown -h
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jan 7 02:20:02 PST 1997
>Last-Modified:
>Originator: Peter Jeremy
>Organization:
Peter Jeremy (VK2PJ) peter.jeremy@alcatel.com.au
Alcatel Australia Limited
41 Mandible St Phone: +61 2 9690 5019
ALEXANDRIA NSW 2015 Fax: +61 2 9690 5247
>Release: FreeBSD 2.1-STABLE i386
>Environment:
Clone VLB i486DX2-50 with no-name VLB IDE controller.
FreeBSD 2.1.5-RELEASE #0: Tue Dec 31 06:45:18 EST 1996
root@vk2pj.alcatel.com.au:/home/src/FreeBSD/sys/compile/vk2pj
CPU: i486DX (486-class CPU)
real memory = 20971520 (20480K bytes)
avail memory = 18784256 (18344K bytes)
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color {16 virtual consoles, flags=0x0}
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16450
sio1 at 0x2f8-0x2ff irq 9 on isa
sio1: type 16550A
sio2 at 0x3e8-0x3ef irq 3 on isa
sio2: type 16450
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
lpt1 at 0x278-0x27f irq 5 on isa
lpt1: Interrupt-driven port
lp1: TCP/IP capable interface
pca0 on motherboard
pca0: PC speaker audio driver
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 765
fd0: 1.44MB 3.5in
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (wd0): {Conner Peripherals 420MB - CFS420A}, 32-bit, multi-block-64
wd0: 406MB (832608 sectors), 826 cyls, 16 heads, 63 S/T, 512 B/S
aha0 at 0x334-0x337 irq 11 drq 6 on isa
(aha0:6:0): "ARCHIVE VIPER 150 21247 -005" type 1 removable SCSI 1
st0(aha0:6:0): Sequential-Access st0: Archive Viper 150 is a known rogue
density code 0x0, drive empty
matcd - Matsushita (Panasonic) CD-ROM Driver by FDIV, Version 1(26) 18-Oct-95
matcdc0 at 0x230-0x233 on isa
matcdc0 Host interface type 0
matcd0: [CR-5630.75]
npx0 on motherboard
npx0: INT 16 interface
sb0 at 0x220 irq 10 drq 1 on isa
sb0: {SoundBlaster 16 4.11}
sbxvi0 at 0x0 drq 5 on isa
sbxvo0: {SoundBlaster 16 4.11}
sbmidi0 at 0x330 on isa
{SoundBlaster MPU-401}
opl0 at 0x388 on isa
opl0: {Yamaha OPL-3 FM}
joy0 at 0x201 on isa
joy0: joystick
>Description:
When the system is shut down and halted from multi-user mode, the mounted
filesystems are not unmounted cleanly. This causes an fsck on the next
reboot. When the system is brought down to single-user, the filesystems
manually unmounted and then the system is halted, there is no problem
(/ unmounts cleanly).
I added some code to /sys/i386/i386/machdep.c:boot() to display dirty
buffers (see below) after the `giving up' message. This showed the
following quite consistently (there were almost always 4 busy buf's):
b_flags == B_ASYNC | B_BUSY | B_CACHE (mostly) | B_WRITEINPROG
b_resid == 0
b_bcount == 0x400, 0x800, 0x1800, 0x2000
b_lblkno == b_blkno = 1984, 16, 48, 64 (respectively)
b_pblkno varies widely. I haven't seen any pattern
b_dev = 0xff00
>How-To-Repeat:
[from multi-user mode]
# shutdown -h now
...
syncing disks ... 4 4 4 4 ... giving up
>Fix:
[from multi-user mode]
# shutdown now
[select shell]: sh
# umount -av
# halt
...
syncing disks ... done
The added code in machdep.c is:
*** /cdrom/usr/src/sys/i386/i386/machdep.c Tue Jun 25 16:19:29 1996
--- /usr/src/sys/i386/i386/machdep.c Sat Nov 30 19:09:47 1996
***************
*** 888,893 ****
--- 888,930 ----
* unmount filesystems (thus forcing an fsck on reboot).
*/
printf("giving up\n");
+ for (bp = buf, iter = 0; iter < nbuf; iter++, bp++) {
+ long flags = bp->b_flags;
+ if ((flags & (B_BUSY | B_INVAL)) == B_BUSY) {
+ printf("%4d 0x%08lx", iter, flags);
+ if (flags & B_AGE) printf(" age");
+ if (flags & B_APPENDWRITE) printf(" appendwrite");
+ if (flags & B_ASYNC) printf(" async");
+ if (flags & B_BAD) printf(" bad");
+ if (flags & B_BUSY) printf(" busy");
+ if (flags & B_CACHE) printf(" cache");
+ if (flags & B_CALL) printf(" call");
+ if (flags & B_DELWRI) printf(" delwri");
+ if (flags & B_DIRTY) printf(" dirty");
+ if (flags & B_DONE) printf(" done");
+ if (flags & B_EINTR) printf(" eintr");
+ if (flags & B_ERROR) printf(" error");
+ if (flags & B_GATHERED) printf(" gathered");
+ if (flags & B_INVAL) printf(" inval");
+ if (flags & B_LOCKED) printf(" locked");
+ if (flags & B_NOCACHE) printf(" nocache");
+ if (flags & B_MALLOC) printf(" malloc");
+ if (flags & B_CLUSTEROK) printf(" clusterok");
+ if (flags & B_PHYS) printf(" phys");
+ if (flags & B_RAW) printf(" raw");
+ if (flags & B_READ) printf(" read");
+ if (flags & B_TAPE) printf(" tape");
+ if (flags & B_RELBUF) printf(" relbuf");
+ if (flags & B_WANTED) printf(" wanted");
+ if (flags & B_WRITEINPROG) printf(" writeinprog");
+ if (flags & B_XXX) printf(" xxx");
+ if (flags & B_PAGING) printf(" paging");
+ if (flags & B_VMIO) printf(" vmio");
+ if (flags & B_CLUSTER) printf(" cluster");
+ if (flags & B_BOUNCE) printf(" bounce");
+ printf(" resid=%x bcount=%x lblk=%d blk=%d pblk=%d dev=%x\n", bp->b_resid, bp->b_bcount, bp->b_lblkno, bp->b_blkno, bp->b_pblkno, bp->b_dev);
+ }
+ }
} else {
printf("done\n");
/*
>Audit-Trail:
>Unformatted:
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