Date: Tue, 16 Dec 1997 21:38:08 +0100 From: "Jesus A. Mora Marin" <amora@zoom.es> To: questions@FreeBSD.ORG Subject: MFS related questions Message-ID: <199712162137.WAA09873@silvester.zoom.es>
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Hi! I'd like to have MFS support configured in my custom kernel, partly for improving compilation times and partly just for fun. But I have some doubts about how MFS works in FreeBSD. First, according to the description of MFS in the "Design & implementation of 4.4 BSD Operating System", by McKusick et al., MFS is implemented in a paging on demand basis, and the kernel doesn't reserve a dedicated area of memory for it. I must supose that scheme is used in FreeBSD, isn't it? Does this mean that memory is not used anyway until blocks in the MFS are accessed? BTW, what's the exact meaning of the MFS_ROOT option in the kernel config file? My system has 32MB RAM and 48MB swap space, and the greater project I ever compiled is the custom kernel, or maybe `mysql'. What size would you recommend for MFS to get some benefit in compilation? Also, what is the impact of a larger MFS mounted, mainly in memory usage? TIA, Jesus ------ Jesus A. Mora Marin, MD. (aka EA7HAC, ex-EC7DVE)
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