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Date:      Fri, 2 Feb 2001 10:06:59 -0800 (PST)
From:      Matt Dillon <dillon@earth.backplane.com>
To:        Robert Watson <rwatson@FreeBSD.ORG>
Cc:        emulation@FreeBSD.ORG, sos@FreeBSD.ORG
Subject:   Re: long hangs running vmware -- vm system interactions?
Message-ID:  <200102021806.f12I6x556847@earth.backplane.com>
References:   <Pine.NEB.3.96L.1010202105728.30254A-100000@fledge.watson.org>

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:I've also noticed that I get messages like these during the startup of
:windows under VMware (possibly a property of the wiring behavior
:previously described):
:
:Feb  2 10:58:21 curry /boot/kernel/kernel: swap_pager: indefinite wait buffer: device: ad0s1b, blkno: 288, size: 4096
:Feb  2 10:58:22 curry /boot/kernel/kernel: swap_pager: indefinite wait buffer: device: ad0s1b, blkno: 376, size: 4096
:Feb  2 10:58:22 curry /boot/kernel/kernel: swap_pager: indefinite wait buffer: device: ad0s1b, blkno: 1536, size: 16384
:
:Normally I'd think this was an impending IDE drive failure, only a number
:of others have reported seeing this behavior under -CURRENT also.  Don't
:know if it's a product of VMWare, the VM system, or the ATA driver...
:
:Robert N M Watson             FreeBSD Core Team, TrustedBSD Project

    This message occurs when the system is trying to swap pages in and
    I/O queued to the swap device (aka hard drive) does not complete
    after 20 seconds.  The swapper will still wait until the I/O
    completes.

    So something is tying up your IDE bus for 20+ seconds.

						-Matt



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