Date: Fri, 07 Dec 2007 11:52:47 -0500 From: Stephen Clark <Stephen.Clark@seclark.us> To: Uwe Doering <gemini@geminix.org> Cc: freebsd-stable@freebsd.org Subject: Re: 4.x Collecting pv entries Suggest increasing PMAP_SHPGPERPROC, Message-ID: <47597A5F.7070001@seclark.us> In-Reply-To: <4759717D.2090409@geminix.org> References: <47594087.7030703@seclark.us> <b41c75520712070453w11181b7am9d95a215d15ad091@mail.gmail.com> <475952EF.70400@seclark.us> <47596B11.90601@geminix.org> <47596CD2.4080502@seclark.us> <4759717D.2090409@geminix.org>
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Uwe Doering wrote: > Hi Steve, > > Stephen Clark wrote: > >> Uwe Doering wrote: >> >>> [...] >>> But you can put that option into the kernel config file: >>> >>> options PMAP_SHPGPERPROC=... >>> >>> and build a new kernel with it. >> >> >> You are correct. My question is more how much should I increase it. >> The current default in the 4.x LINT file >> is "options PMAP_SHPGPERPROC=201" should I double it? Increase it by >> 50 to 251? Should it be a prime number? >> I am just asking for information. > > > The settings in the LINT file are not necessarily the defaults, rather > mere examples. The default value for PMAP_SHPGPERPROC is 200 (defined > in the source file /usr/src/sys/i386/i386/pmap.c). I would recommend > to increase it by 100 until the messages stop. We use 300 on our > servers, for instance. > > Regards, > > Uwe Thanks a lot for the response. I have only seen the message one time, I have 1 gb of memory with dual xeons, so I was thinking first I would bump it to 251. Regards, Steve -- "They that give up essential liberty to obtain temporary safety, deserve neither liberty nor safety." (Ben Franklin) "The course of history shows that as a government grows, liberty decreases." (Thomas Jefferson)
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