Messages in this thread | | | Date | Wed, 09 Dec 1998 08:25:19 +1000 (EST) | From | Peter Waltenberg <> | Subject | Showstoppers (SCSI ?) |
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I think I may have found another. (2.0.131 AND 2.0.32)
While trying to untar from a scsi tape to scsi disk I'm getting reliable system hangs. The tape tar tvf's just fine, but reliably hangs the system when writing a particular file.
Interestingly enough 2.0.32 behaves simillarly and hangs writing the same file, but not quite as lethally.
On 2.1.131. More than just the tar blocks (D state) all filesystem accesses to the destination filesystem wedge, system load keeps growing and eventually the kernel dies.
Manually translating the last page of the crash trace:
Mostly the system was ping-ponging between do_page_fault and error_code with an occassional vgacon_cursor or set_cursor.
Last words: Cannot handle kernel paging request. Aieee Killing interrupt handler.
The scsi disk is only about 3% full when this happens and has plenty of inodes left.
The 2.0.32 system we had problems with originally has an AIC7880 with the disk on it and a 2940 for the tape.
The 2.1.131 system has an AHA1542 with both devices on it.
The scsi disk is 9G , split into 4 just over 2G partitions.
Things I've tried so far:
No bad blocks on the disk, I rebuilt the e2fs file system on it with tools that built a usable 2G+ partition on IDE on the same machine. cp -ar/ tar from another disk to the scsi disk all work error free.
I can believe the tar image on tape may have some sort of wierd problem, however it looks like this (whatever it is) would make a great DOS attack ;).
Extracting to /dev/null also hangs. But since it hasn't taken the machine with it .....
ps al FLAGS UID PID PPID PRI NI SIZE RSS WCHAN STA TTY TIME COMMAND
40 0 409 1 0 0 0 0 down_failed SW p0 0:00 (scsi_eh_ 0)
0 0 482 390 0 0 872 464 down_failed D p0 0:10 tar xvfO /dev/tape
If anyone has any ideas on finding the real bug here mail me. I can do some testing on the machine after hours.
Peter ---------------------------------- E-Mail: Peter Waltenberg <peterw@dascom.com> Date: 09-Dec-98 Time: 07:27:33
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