Date: Mon, 8 Nov 2004 15:21:18 -0800 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: Claus Guttesen <cguttesen@yahoo.dk> Cc: freebsd-amd64@freebsd.org Subject: Re: How to debug >2GB memory issues (and 3ware) Message-ID: <20041108232118.GD73306@funkthat.com> In-Reply-To: <20041108193720.15976.qmail@web14102.mail.yahoo.com> References: <20041108191947.GA49800@manor.msen.com> <20041108193720.15976.qmail@web14102.mail.yahoo.com>
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Claus Guttesen wrote this message on Mon, Nov 08, 2004 at 20:37 +0100: > > I have a Dual 4GB system with a 3ware SATA > > controller that's working > > properly as long as I restrict it to 2GB with: > > hw.physmem=2G > > Obviously, I'd like to have access to the other 2GB > > of RAM. But > > if I go past 2GB, I get random crashes during all > > builds (world, > > kernel, port). > > I can't help you with that particular question, but I > had issues with a Dell-server and 4 GB RAM which was > resolved the same way. Maybe a list of drivers that > are 2GB-, 4GB-ready etc. It's getting more and more > common to have 4+ GB. Not sure about 2GB, since that seems like someone is handling a signed value incorrectly or something like that, but there is the busdma status page at: http://www.freebsd.org/projects/busdma/ If the driver has been busdma'ified, then it should handle >4GB memory w/o troubles.. If it is still having data corruption issues, it might be because the card can't handle the memory range that the drive thinks it can... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."
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