Article View: comp.unix.sysv286
Article #118Re: Kernel Definition
From: Daniel Klein
Date: Thu, 23 May 1991 15:59
Date: Thu, 23 May 1991 15:59
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1628 bytes
In article <1423@necis.UUCP>, jjp@necis.UUCP (Jeff Phillips) writes: |> A friend of mine is writing a paper on balanced system approach. In it he |> makes the assertion that "...(the UNIX operating system is) too large to fit |> in system RAM all at once, therefore pieces of the operating system are swapped |> between system RAM and disk, thereby generating even more disk I/O requests." I believe that your friend is sadly mistaken. Unless things have changed radically in the past year or two, the kernel is wholly memory resident. Some so-called "system" processes are swap/pageable in the same way that "user" processes are. Some examples are the FTP daemon, the RLOGIN daemon, and so forth). Even these are not true "system" processes. "System" processes (like the swapper and page daemon) are not swapped or paged (for obvious reasons). -- ============ -- =========== -- =========== -- =========== -- =========== -- "The only thing that separates us from the animals is superstition and mindless rituals" (Latke) Daniel Klein CMU-SEI +1 412/268-7791 dvk@sei.cmu.edu
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!tut.cis.ohio-state.edu!sei.cmu.edu!dvkReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!tut.cis.ohio-state.edu!sei.cmu.edu!dvk From: dvk@sei.cmu.edu (Daniel Klein) Newsgroups: comp.unix.sysv286,comp.unix.sysv386,comp.unix.xenix.misc,comp.unix.xenix.sco,comp.unix.wizards Subject: Re: Kernel Definition Message-ID: <25915@as0c.sei.cmu.edu> Date: 23 May 91 15:59:21 GMT References: <1423@necis.UUCP> Sender: netnews@sei.cmu.edu Organization: CMU Software Engineering Institute Lines: 18