Date: Fri, 27 Sep 2002 22:41:10 +0200 From: Matthias Buelow <mkb@mukappabeta.de> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: 4.7RC on PWS 600AU: machine check panic on boot Message-ID: <20020927204109.GA23930@moghedien.mukappabeta.net> In-Reply-To: <15764.48819.545378.165995@grasshopper.cs.duke.edu> References: <20020927200359.GC23842@moghedien.mukappabeta.net> <15764.48819.545378.165995@grasshopper.cs.duke.edu>
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Andrew Gallatin writes: >You can't use > 1GB of RAM on a PWS. I don't think the busdma code is >currently smart enough to use s/g dma for buffers outside the >direct-map window (1GB on PWS). The failure mode is rather strange, >but not all that surprising if an errant DMA scribbled over some >kernel data. *sigh*, ok, NetBSD allegedly does support scatter-gather DMA for >1GB, so I'll rather try and get the bug fixed there which causes SCSI errors after some disk usage... I want to use the machine with the installed 1.5G RAM, naturally. However, the problem with FreeBSD is not some odd crash somewhere, but a machine check always at the same place at boot. Don't know if that's related to the situation you describe. >Not what you wanted to hear, probably. Yeah, you can't always get what you want. :) -- Matthias Buelow, de.mukappabeta@mkb To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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