Date: Sun, 29 Dec 1996 23:33:07 -0800 From: David Greenman <dg@root.com> To: brian@mediacity.com Cc: freebsd-smp@freebsd.org Subject: Re: A question of how much memory? Message-ID: <199612300733.XAA04837@root.com> In-Reply-To: Your message of "Sun, 29 Dec 1996 18:44:28 PST." <19961230024428.26653.qmail@mediacity.com>
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>David Greenman wrote: >> You're correct that your assumption is wrong. All of the memory is shared >> in SMP PCs. The reason the machine panics is because you have run out of >> kernel virtual memory. You need to more carefully tune the various parameters >> in your kernel config file (the ones that take lots of virtual memory like >> NMBCLUSTERS). The fact that it doesn't panic with 128MB indicates that you >> are right on the edge of running out and the extra kernel data structures >> that are allocated to manage 256MB is just enough to run out. > >> BTW, why do you have bounce buffers configured in your kernel?? > >That option is turned on in the GENERIC config by default. Shall >I comment it out? If you aren't using a ahc-1542 controller then you don't need it and it just wastes kernel VM, so yes, comment it out. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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