Strange instabilities on two(!) LX machines

Strange instabilities on two(!) LX machines

Post by Stefan Boresc » Sat, 16 Dec 2000 23:00:58

I am running RH 6.2 (with patches applied, RH's 2.2.16-3 kernel) on
three machines, 2 LX533MHz, one UX with a 500MHz processor.  All three
machines are identically softwarewise and are pretty bare bones
systems ; no X for example.

While the UX has an uptime of > 4 months by now (the time since
upgrading to RH 6.2), the two LXs hang every 1-2 weeks.  Symptoms: No
screen on the console; when logging in remotely, the echoing of
characters seems always one character behind. Simple commands (cd, ls
uptime) work, but I can't shutdown the machine -- the shutdown process
starts, but sits forever.  The machines appear to be idle. I have not
been able to extract any useful messages to the syslog; the only thing
that helps is hitting the reset button.

The machines rely heavily on NIS/NFS and automount (are there any
problems related to this?  Under RH 5.2 I once in a while had
crashes when transferring large (> 2GB) amounts of data via NFS)

Has anyone seen something like this; is this a known problem? I am
happy to provide add. info.

Thanks for any hints,



Output from dmesg after a recent reboot:

19990314/Linux (egcs-1.1.2 release)) #1 Mon Jun 19 17:45:16 EDT 2000
Booting GENERIC on EB164 variation LX164 using machine vector LX164 from MILO
Command line: bootdevice=sda5 bootfile=boot/vmlinuz-2.2.16-3 root=/dev/sda5
Console: colour VGA+ 80x25
Calibrating delay loop... 530.58 BogoMIPS
Memory: 256016k available
Dentry hash table entries: 32768 (order 6, 512k)
Buffer cache hash table entries: 262144 (order 8, 2048k)
Page cache hash table entries: 32768 (order 5, 256k)
VFS: Diskquotas version dquot_6.4.0 initialized
POSIX conformance testing by UNIFIX
Alpha PCI BIOS32 revision 0.04
PCI: Probing PCI hardware

Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
NET4: Unix domain sockets 1.0 for Linux NET4.0.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
TCP: Hash tables configured (ehash 262144 bhash 65536)
Starting kswapd v 1.5
Detected PS/2 Mouse Port.
Serial driver version 4.27 with no serial options enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
pty: 256 Unix98 ptys configured
RAM disk driver initialized:  16 RAM disks of 8192K size
CMD646: IDE controller on PCI bus 00 dev 58
CMD646: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0x9000-0x9007, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0x9008-0x900f, BIOS settings: hdc:pio, hdd:pio
Floppy drive(s): fd0 is 2.88M
FDC 0 is a post-1991 82077
md driver 0.90.0 MAX_MD_DEVS=256, MAX_REAL=12
linear personality registered
raid0 personality registered
raid1 personality registered
raid5 personality registered
raid5: measuring checksumming speed
   8regs     :   584.000 MB/sec
   32regs    :   648.000 MB/sec
using fastest function: 32regs (648.000 MB/sec)
(scsi0) <Adaptec AHA-294X Ultra SCSI host adapter> found at PCI 0/7/0
(scsi0) Wide Channel, SCSI ID=7, 16/255 SCBs
(scsi0) Downloading sequencer code... 422 instructions downloaded
DC390: 0 adapters found
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.30/3.2.4
       <Adaptec AHA-294X Ultra SCSI host adapter>
scsi : 1 host.
(scsi0:0:0:0) Synchronous at 20.0 Mbyte/sec, offset 8.
  Vendor: IBM       Model: DDRS-39130W       Rev: S92A
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
(scsi0:0:3:0) Synchronous at 10.0 Mbyte/sec, offset 15.
  Vendor: PLEXTOR   Model: CD-ROM PX-32TS    Rev: 1.02
  Type:   CD-ROM                             ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 3, lun 0
scsi : detected 1 SCSI cdrom 1 SCSI disk total.
Uniform CD-ROM driver Revision: 3.10
SCSI device sda: hdwr sector= 512 bytes. Sectors= 17850000 [8715 MB] [8.7 GB]
Partition check:
 sda: sda1 sda2 < sda5 sda6 sda7 >
md.c: sizeof(mdp_super_t) = 4104
autodetecting RAID arrays
autorun ...
... autorun DONE.
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 208k freed
Adding Swap: 281088k swap-space (priority -1)

eth0: Digital DS21140 Tulip at 0x8000, 00 40 05 42 e4 da, IRQ 18.
eth0:  EEPROM default media type Autosense.
eth0:  Index #0 - Media MII (#11) described by a 21140 MII PHY (1) block.
eth0:  MII transceiver found at MDIO address 0, config 0000 status 780d.
eth0:  Advertising 01e1 on PHY 0, previously advertising 0001.
eth0:  Advertising 01e1 on PHY 0 (0).
eth0: Setting full-duplex based on MII Xcvr #0 parter capability of 41e1.

nfsd_fh_init : initialized fhcache, entries=1365


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