Dear bacula users,

I am running bacula-mysql 2.2.5 (rpm from sourceforge) on a SuSE SLES
10SP1 machine, kernel version 2.6.16 (SMP).

I configured and mounted tape drive via iSCSI. I can tar from and to
this drive without problems. I can label a tape with btape, read this
label without problems. But immediatly after writing a few blocks using
qfill or wr the machine stops working. One of my write attempts left a
kernel panic message in /var/log/messages:

Oct 24 13:28:26 bacula kernel: Bad page state in process 'btape'
Oct 24 13:28:26 bacula kernel: page:c16cce40 flags:0x80000000
mapping:00000000 mapcount:0 count:1
Oct 24 13:28:26 bacula kernel: Trying to fix it up, but a reboot is needed
Oct 24 13:28:26 bacula kernel: Backtrace:
Oct 24 13:28:26 bacula kernel:  [<c0149955>] bad_page+0x42/0x68
Oct 24 13:28:26 bacula kernel:  [<c0149dbd>] __free_pages_ok+0x55/0xe4
Oct 24 13:28:26 bacula kernel:  [<f906e0bb>] normalize_buffer+0x31/0x63 [st]
Oct 24 13:28:26 bacula kernel:  [<f9070492>] st_release+0x1e/0x45 [st]
Oct 24 13:28:26 bacula kernel:  [<c01613d5>] __fput+0xa1/0x167
Oct 24 13:28:26 bacula kernel:  [<c015ed5d>] filp_close+0x4e/0x54
Oct 24 13:28:26 bacula kernel:  [<c0103bdb>] sysenter_past_esp+0x54/0x79
Oct 24 13:28:26 bacula kernel: Bad page state in process 'btape'
Oct 24 13:28:26 bacula kernel: page:c16cce60 flags:0x80000080
mapping:00000000 mapcount:0 count:1
Oct 24 13:28:26 bacula kernel: Trying to fix it up, but a reboot is needed
Oct 24 13:28:26 bacula kernel: Backtrace:
Oct 24 13:28:26 bacula kernel:  [<c0149955>] bad_page+0x42/0x68
Oct 24 13:28:26 bacula kernel:  [<c0149dbd>] __free_pages_ok+0x55/0xe4
Oct 24 13:28:26 bacula kernel:  [<f906e0bb>] normalize_buffer+0x31/0x63 [st]
Oct 24 13:28:26 bacula kernel:  [<f9070492>] st_release+0x1e/0x45 [st]
Oct 24 13:28:26 bacula kernel:  [<c01613d5>] __fput+0xa1/0x167
Oct 24 13:28:26 bacula kernel:  [<c015ed5d>] filp_close+0x4e/0x54
Oct 24 13:28:26 bacula kernel:  [<c0103bdb>] sysenter_past_esp+0x54/0x79

So this seems to be a kernel bug. Googling lead me to
http://www.mail-archive.com/bacula-users@lists.sourceforge.net/msg17890.html
but this didn't help too much ...

My question is: What is the difference between the tape write actions of
tar and btape? Maybe I will be able to configure the tape device so that
btape doesn't run in kernel panics any more?

-- 
Regards
Christoph
________________________________________________________________________
Christoph Litauer                  [EMAIL PROTECTED]
Uni Koblenz, Computing Center,     http://www.uni-koblenz.de/~litauer
Postfach 201602, 56016 Koblenz     Fon: +49 261 287-1311, Fax: -100 1311
PGP-Fingerprint: F39C E314 2650 650D 8092 9514 3A56 FBD8 79E3 27B2


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