Date: Thu, 30 Sep 2004 14:09:46 +0200 (CEST) From: Claus Guttesen <cguttesen@yahoo.dk> To: Scott Long <scottl@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: unable to install beta6 [amd64] on Dell 2850 with 4 GB RAM,workaround Message-ID: <20040930120946.26047.qmail@web14107.mail.yahoo.com> In-Reply-To: <415BB667.9000302@FreeBSD.org>
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> The AMR driver cannot handle >4GB of RAM. Even > though you only have > 4GB, your chipset is remapping part of it to the > >4GB region. The > driver incorrectly interfaces with busdma and cannot > handle this > scenario very well. The panic is to be expected. > You can verify > this by setting the tunable 'hw.physmem' in the > loader to some > value under 4GB to artifically limit the amount of > RAM that the OS > sees. Added hw.physmem=4G to /boot/loader.conf and it seems to solve the issue. Dmesg now tells me that I have real memory = 3489398784 (3327 MB) avail memory = 3367739392 (3211 MB) It seems that it does ignore some RAM, but is this the correct behaviour? Without hw.physmem I get real memory = 5100273664 (4864 MB) avail memory = 4125847552 (3934 MB) So it appears to perform an incorrect probing of memory. Thank you. Claus
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