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2.6.7-vanilla-SMP kernel: pagebuf_get: failed to lookup pages

To: Linux-Kernel <linux-kernel@xxxxxxxxxxxxxxx>
Subject: 2.6.7-vanilla-SMP kernel: pagebuf_get: failed to lookup pages
From: L A Walsh <lkml@xxxxxxxxx>
Date: Wed, 21 Jul 2004 17:04:09 -0700
Cc: linux-xfs@xxxxxxxxxxx
Sender: linux-xfs-bounce@xxxxxxxxxxx
User-agent: Mozilla Thunderbird 0.7.1 (Windows/20040626)

Jul 20 09:07:34 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 20 09:07:34 ishtar last message repeated 25 times
Jul 20 09:26:38 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 20 09:27:09 ishtar last message repeated 354 times
Jul 20 09:27:52 ishtar last message repeated 274 times
Jul 20 09:45:46 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 20 09:45:46 ishtar last message repeated 2 times
Jul 20 10:00:10 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 21 02:30:00 ishtar su: (to backup) root on none
Jul 21 02:30:01 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 21 02:30:04 ishtar last message repeated 16 times
Jul 21 02:30:30 ishtar su: (to backup) root on none
Jul 21 02:31:55 ishtar su: (to backup) root on none
Jul 21 02:31:55 ishtar last message repeated 3 times
Jul 21 03:15:09 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 21 03:15:09 ishtar last message repeated 4 times
Jul 21 04:07:34 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 21 04:07:34 ishtar last message repeated 9 times
Jul 21 04:26:44 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 21 04:27:45 ishtar last message repeated 1516 times
Jul 21 04:27:54 ishtar last message repeated 36 times
Jul 21 04:45:51 ishtar kernel: pagebuf_get: failed to lookup pages
Jul 21 04:45:51 ishtar last message repeated 7 times

----

Any idea what this message means? I especially notice a high frequency during high disk i/o. File systems are all xfs if that is pertinent. Backups run in early AM backing up SCSI disks to a large IDE. However, the messages around 9:27 on the
20th wouldn't have been backup related but possibly processing a backlog of
email after some system maintenance -- and that would have all been on SCSI disks.



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