Date: Tue, 29 Dec 2009 22:46:06 -0600 (CST) From: Scott Bennett <bennett@cs.niu.edu> To: freebsd-questions@freebsd.org Subject: questions about superpages Message-ID: <200912300446.nBU4k6G7022406@mp.cs.niu.edu>
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I poked around in the stuff in /sys/i386/vm looking for the threshholds
of process memory size for promotion to 4 MB pages and for demotion back to
4 KB pages, but didn't see them. Can someone tell me what those threshholds
are? I'm assuming there must be a larger threshhold for promotion than for
demotion on the basis that hysteresis is necessary to keep the VM system
continual oscillation of processes with memory requirements close to the
promotion thresshold. If someone who knows can also point me toward the
place that these values appear in the source code, I'd appreciate that, too.
Thanks in advance!
Scott Bennett, Comm. ASMELG, CFIAG
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