Date: Tue, 10 Oct 2000 11:50:51 +0800 (CST) From: Tai-hwa Liang <avatar@mmlab.cse.yzu.edu.tw> To: freebsd-stable@freebsd.org Subject: md hangs in 4.1.1R Message-ID: <Pine.BSF.4.21.0010101116530.323-100000@brahms.mmlab.cse.yzu.edu.tw>
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Hi,
I've followed the man page to create, mount a md device and perform
postfix(snapshot-20001005) compilation on it; however, the building process
just hung after some(heavily?) I/O operations.
According to the advised "ps axl," it seems that the building process
was hung on process with "MD sec" in the WCHAN field. It's completely
reproducible on my laptop(tested on 4.1-RELEASE & 4.1.1-RELEASE). Sometimes
the "MD sec" appeared on 'syncer', sometimes the 'bufdaemon' stuck in it.
Following snapshot appears it just stuck in the 'cp' process.
UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TT TIME COMMAND
0 0 0 0 -18 0 0 0 sched DLs ?? 0:00.01 (swapper)
0 1 0 0 10 0 456 288 wait ILs ?? 0:00.03 /sbin/init --
0 2 0 0 -18 0 0 0 psleep DL ?? 0:00.01 (pagedaemon)
0 3 0 0 18 0 0 0 psleep DL ?? 0:00.00 (vmdaemon)
0 4 0 0 -18 0 0 0 psleep DL ?? 0:00.17 (bufdaemon)
0 5 0 0 -2 0 0 0 getblk DL ?? 0:00.57 (syncer)
0 33 1 6 18 0 208 92 pause Is ?? 0:00.00 adjkerntz -i
0 96 1 0 2 0 908 612 select Ss ?? 0:00.08 syslogd -s
0 122 1 0 2 0 1512 1068 select Is ?? 0:00.87 /usr/local/sbin/sshd
1000 6113 1 0 2 0 1152 812 select Ss ?? 0:00.00 /usr/local/bin/ssh-agent
0 252 1 0 18 0 1376 1032 pause Is v0 0:00.22 -tcsh (tcsh)
1000 5536 252 0 18 0 1376 1032 pause I v0 0:00.16 -su (tcsh)
1000 5559 5536 8 10 0 1008 676 wait I+ v0 0:00.02 make PATH=.:/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/usr/X11R6/bin
1000 5978 5559 8 10 0 628 432 wait I+ v0 0:00.00 /bin/sh -ec make MAKELEVEL= update
1000 5979 5978 8 10 0 1012 688 wait I+ v0 0:00.02 make MAKELEVEL= update
1000 5980 5979 168 10 0 628 432 wait I+ v0 0:00.01 /bin/sh -ec set -e; for i in src/util src/global src/dns src/master src/postfix src/smtpstone src/sendmail src/error src/pickup src/cleanup src/smtpd src/local src/lmtp src/trivial-rewrite src/qmgr src/smtp src/bounce src/pipe src/showq src/postalias src/postcat src/postconf src/postdrop src/postkick src/postlock src/postlog src/postmap src/postsuper src/nqmgr src/spawn src/flush; do (set -e; echo "[$i]"; cd $i; make "CC=gcc -Wmissing-prototypes -Wformat" update MAKELEVEL=) || exit 1; done
1000 7442 5980 171 10 0 1080 764 wait I+ v0 0:00.05 make CC=gcc -Wmissing-prototypes -Wformat update MAKELEVEL=
1000 7477 7442 171 -20 0 688 108 MD sec D+ v0 0:00.00 cp lmtp ../../libexec
1000 188 1 3 18 0 1376 1028 pause Ss v1 0:00.22 -tcsh (tcsh)
1000 7501 188 3 28 0 416 256 - R+ v1 0:00.00 ps axlwww
0 189 1 0 3 0 920 624 ttyin Is+ v2 0:00.01 /usr/libexec/getty Pc ttyv2
Furthermore, if the building process was hung, it's noway to break
the process with ^C. If I issue a 'shutdown -h now' at this moment, the system
would try to flush the buffer and failed with "syncer...timed out."
Shutting down daemon processes:.
Oct 10 11:06:27 brahms syslogd: exiting on signal 15
Oct 10 11:06:27 init: some processes would not die; ps axl advised
Waiting (max 60 seconds) for system process `bufdaemon' to stop...stopped
Waiting (max 60 seconds) for system process `syncer' to stop...timed out
syncing disks... 192 192 192 192 192 192 192 192 192 192 192 192 192 192 192
192 192 192 192 192
1: dev:#md/2, flags:21021024, blkno:65712, lblkno:65712
2: dev:#md/2, flags:21021024, blkno:20112, lblkno:-12
3: dev:#md/2, flags:21021024, blkno:81328, lblkno:12
4: dev:#md/2, flags:21021024, blkno:65648, lblkno:65648
5: dev:#md/2, flags:21021024, blkno:80912, lblkno:1
6: dev:#md/2, flags:21021024, blkno:81008, lblkno:56
.
.
.
72: dev:#md/2, flags:21021024, blkno:81376, lblkno:5
73: dev:#md/2, flags:21021024, blkno:80806, lblkno:3
giving up on 73 buffers
Uptime: 2h9m22s
The operating system has halted.
Please press any key to reboot.
BTW, I've tried MFS instead of MD last night. The building process
worked well; however, if I reboot the system without unmounting the MFS first,
the "Waiting (max 60 seconds) for system process.....timed out" message just
popped up again in the console. I've never encountered such problem with MFS
in 2-stable & 3-stable. Is there anyone who can verify this mystic hang for
me? TIA.
dmesg output:
Copyright (c) 1992-2000 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.1.1-RELEASE #0: Sun Oct 8 15:37:39 CST 2000
root@brahms.mmlab.cse.yzu.edu.tw:/usr/src/sys/compile/brahms
Timecounter "i8254" frequency 1193108 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (265.25-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x652 Stepping = 2
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
real memory = 134217728 (131072K bytes)
avail memory = 127586304 (124596K bytes)
Preloaded elf kernel "kernel" at 0xc031b000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc031b09c.
Preloaded elf module "splash_bmp.ko" at 0xc031b0ec.
Preloaded splash_image_data "/boot/chuck1.bmp" at 0xc031b190.
VESA: v2.0, 2048k memory, flags:0x0, mode table:0xc00c876a (c000876a)
VESA: Copyright 1994 TRIDENT MICROSYSTEMS INC.
Pentium Pro MTRR support enabled
md0: Malloc disk
apm0: <APM BIOS> on motherboard
apm: found APM BIOS v1.2, connected at v1.2
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX host to PCI bridge (AGP disabled)> on motherboard
pci0: <PCI bus> on pcib0
pci0: <Trident model 9388 VGA-compatible display device> at 2.0 irq 9
isab0: <Intel 82371AB PCI to ISA bridge> at device 3.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xfcd0-0xfcdf at device 3.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
pci0: <Intel 82371AB/EB (PIIX4) USB controller> at 3.2 irq 9
chip1: <Intel 82371AB Power management controller> port 0xff80-0xff8f at device 3.3 on pci0
pcic-pci0: <TI PCI-1221 PCI-CardBus Bridge> at device 10.0 on pci0
pcic-pci0: TI12XX PCI Config Reg: [speaker enable][FUNC pci int + CSC serial isa irq]
pcic-pci1: <TI PCI-1221 PCI-CardBus Bridge> at device 10.1 on pci0
pcic-pci1: TI12XX PCI Config Reg: [speaker enable][FUNC pci int + CSC serial isa irq]
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 flags 0x10 on isa0
sio1: type 16550A
sbc0: <ESS 688> at port 0x220-0x22f irq 5 drq 3 flags 0x15 on isa0
pcm0: <ESS 18xx DSP> on sbc0
pcic0: <VLSI 82C146> at port 0x3e0-0x3e1 irq 10 on isa0
pcic0: management irq 10
pccard0: <PC Card bus -- kludge version> on pcic0
pccard1: <PC Card bus -- kludge version> on pcic0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppi0: <Parallel I/O> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
plip0: <PLIP network interface> on ppbus0
ad0: 3102MB <HITACHI_DK237A-32> [6304/16/63] at ata0-master using UDMA33
acd0: CDROM <UJDA150> at ata0-slave using WDMA2
Mounting root from ufs:/dev/ad0s2a
WARNING: / was not properly dismounted
pccard: card inserted, slot 1
kernel configuration:
machine i386
ident brahms
maxusers 10
makeoptions CONF_CFLAGS=-fno-builtin #Don't allow use of memcmp, etc.
options MAXDSIZ="(256*1024*1024)"
options DFLDSIZ="(256*1024*1024)"
options BLKDEV_IOSIZE=8192
options PQ_CACHESIZE=512 # color for 512k/16k cache
options ROOTDEVNAME=\"ufs:ad0s3a\"
cpu I686_CPU
options NO_F00F_HACK
options COMPAT_43
options SYSVSHM
options SYSVSEM
options SYSVMSG
options DDB
options KTRACE #kernel tracing
options USERCONFIG #boot -c editor
options VISUAL_USERCONFIG #visual boot -c editor
options INET #Internet communications protocols
pseudo-device ether #Generic Ethernet
pseudo-device loop #Network loopback device
pseudo-device bpf #Berkeley packet filter
options ACCEPT_FILTER_DATA
options ACCEPT_FILTER_HTTP
options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN
options TCP_RESTRICT_RST #restrict emission of TCP RST
options ICMP_BANDLIM
options FFS #Fast filesystem
options FFS_ROOT #FFS usable as root device
options SOFTUPDATES
options MD_NSECT=131072
options EXT2FS
options VFS_AIO
options P1003_1B
options _KPOSIX_PRIORITY_SCHEDULING
options _KPOSIX_VERSION=199309L
pseudo-device pty #Pseudo ttys
pseudo-device gzip #Exec gzipped a.out's
pseudo-device vn #Vnode driver (turns a file into a device)
pseudo-device md #Memory/malloc disk
options MSGBUF_SIZE=40960
device isa
options AUTO_EOI_1
options MAXMEM="(128*1024)"
device atkbdc0 at isa? port IO_KBD
device atkbd0 at atkbdc? irq 1
options KBD_DISABLE_KEYMAP_LOAD # refuse to load a keymap
device psm0 at atkbdc? irq 12
options PSM_HOOKRESUME #hook the system resume event, useful
options PSM_RESETAFTERSUSPEND #reset the device at the resume event
device vga0 at isa?
options VESA
pseudo-device splash
device sc0 at isa?
options MAXCONS=16 # number of virtual consoles
device npx0 at nexus? port IO_NPX flags 0x0 irq 13
device ata
device atadisk # ATA disk drives
device atapicd # ATAPI CDROM drives
options ATA_ENABLE_ATAPI_DMA
device fdc0 at isa? port IO_FD1 irq 6 drq 2
device fd0 at fdc0 drive 0
device sio0 at isa? port IO_COM1 flags 0x10 irq 4
device sio1 at isa? port IO_COM2 flags 0x10 irq 3
device pcm
device sbc0 at isa? port 0x220 irq 5 drq 3 flags 0x15
device apm0
device pci
device pcic0 at isa? irq 10
device card
device ed
options PCIC_RESUME_RESET # reset after resume
device ppc0 at isa? irq 7
device ppbus
device lpt
device plip
device ppi
options NSFBUFS=1024
options INIT_PATH="/sbin/init:/stand/sysinstall"
options CLK_USE_I8254_CALIBRATION
options CLK_USE_TSC_CALIBRATION
options SHOW_BUSYBUFS # List buffers that prevent root unmount
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