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Date: Fri, 16 Dec 2005 10:35:14 -0700
From: Scott Long <scottl@samsco.org>
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Cc: freebsd-stable <freebsd-stable@FreeBSD.org>, sos@FreeBSD.org
Subject: Re: indefinite wait buffer: Does this indicate hardware issue?
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Xin LI wrote:
> Dear folks,
> 
> I have a box indicating the following sometimes:
> "swap_pager: indefinite wait buffer: bufobj: 0, blkno: 262169, size: 4096"
> 
> It's running FreeBSD 6.0-RELEASE, with two Maxtor 7Y250P0 hard disks
> attached to Intel ICH5 UDMA100 controller with hw.ata.wc disabled.
> 
> Does this indicate a hardware issue, or some bugs elsewhere?
> 
> Cheers,
> --

It means that either the hardware or driver lost a transaction, or that
some sort LOR-type situation happened in the VM that is preventing the
transaction from completing.  First of all, do you have more than 4GB of
RAM?

Scott