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Date:      Sat, 9 Feb 2013 09:57:05 -0800
From:      Tim Kientzle <tim@kientzle.com>
To:        arm@freebsd.org
Subject:   "Indefinite wait buffer"
Message-ID:  <FAFE32EB-295A-47A7-A0CD-6B25961D6786@kientzle.com>

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On BeagleBone (r246278) I'm seeing the following after letting
buildworld run for a while:

swap_pager: indefinite wait buffer: bufobj: 0, blkno: 5120, size: 49152
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 5120, size: 49152
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 5120, size: 49152
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 6722, size: 8192
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 6724, size: 8192
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 6781, size: 8192
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 6781, size: 8192
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 6781, size: 8192

At first I thought this was related to NFS but I've since seen
it running just purely with local MMCSD.

I've not debugged swap-related issues before; any suggestions
on how to track this down?

(Obviously, my first step will be to go back to a WITNESS+INVARIANTS
kernel=85)

Tim




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