[27206] in Athena Bugs
Re: linux cluster install defaults to 0.5G swap
daemon@ATHENA.MIT.EDU (andrew m. boardman)
Thu May 15 23:14:03 2008
Message-Id: <200805160313.m4G3Dmhx008602@pothole.mit.edu>
To: Jonathon Weiss <jweiss@mit.edu>
In-Reply-To: Your message of "Thu, 15 May 2008 21:32:58 EDT."
<200805160132.m4G1Wwu4021320@wax-lion.mit.edu>
Date: Thu, 15 May 2008 23:13:48 -0400
From: "andrew m. boardman" <amb@mit.edu>
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Cc: mmanley@mit.edu, bugs@mit.edu
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Thanks for catching this. This:
> I believe this is due to the fact that in the default cluster install
> case the installer uses partitons.sfdisk from the install location in
> afs, and not any actuall values that it has calculated.
...is indeed the case, and I'll have a fix shortly.
This:
> As an aside this machine actually has more memory than that (8G) but
> either more memory was added aftert he install, or /proc/meminfo
> mis-reported the value which is a much harder problem to solve.
...is due to the stock kernels not being built with the PAE extensions to
recognize RAM past 4GB. (Or, really, 4GB less overhead.) That's
unlikely to change before Athena 10, since RHEL only provides the
PAE-enabled -hugemem kernel with SMP turned on as well, a combination
which is likely to raise its own issues.
