Date: Tue, 13 Apr 2010 15:50:33 -0500 From: Kevin Day <toasty@dragondata.com> To: Nathan Whitehorn <nwhitehorn@freebsd.org>, freebsd-ppc@freebsd.org Subject: Re: Xserve G4 stability (random processes crashing) Message-ID: <95CB057A-6A44-4C8F-B57D-CFC8D49F14C7@dragondata.com> In-Reply-To: <2FD96EE6-1761-4040-9E5A-58A33DE1D030@dragondata.com> References: <40B1BEB2-6620-4188-BB71-F8B5ED4AA234@dragondata.com> <4BB5EE68.2040504@freebsd.org> <7F22E2B9-34FB-4E3B-981E-8D2EF73A4F64@dragondata.com> <4BB7A9B2.3080901@freebsd.org> <CD09F9CA-2A98-479E-9C96-2DFDAEA42731@dragondata.com> <4BBA2BD8.9050003@freebsd.org> <2FD96EE6-1761-4040-9E5A-58A33DE1D030@dragondata.com>
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On Apr 5, 2010, at 7:57 PM, Kevin Day wrote: >=20 >=20 >=20 > Even pure NFS (running inside a jail with all of the jail chroot over = NFS) was still crashing. >=20 > But, I think I may have figured out the issue... >=20 > This box only has 1GB of DIMMs installed, but FreeBSD is somehow = seeing 1.25GB of RAM and is apparently trying to use it. If I put 2GB of = RAM in there, it correctly detects 2GB and (so far) buildworld is = running fine after three reboots. >=20 > Mac OS X is only seeing 1GB, and seems to reliably detect that. I'm = going to do some more digging to figure out where the wrong memory size = is coming from. >=20 >=20 Just to follow up... Everything is stable if I have all 4 DIMM sockets filled, no matter what = size DIMMs I use. If I have empty sockets, FreeBSD seems to be seeing = ghost memory that isn't there. OS X always sees the right amount. I = realize how little sense this makes, so I'm going to grab some more G4 = boxes that we haven't touched yet and make sure I can replicate this = there before blaming software. -- Kevin
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