From owner-cvs-all  Mon Aug 20  9:33:23 2001
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Date: Mon, 20 Aug 2001 09:33:16 -0700 (PDT)
From: Matt Dillon <dillon@earth.backplane.com>
Message-Id: <200108201633.f7KGXGJ51695@earth.backplane.com>
To: Bruce Evans <bde@zeta.org.au>
Cc: Peter Wemm <peter@wemm.org>, <cvs-committers@FreeBSD.ORG>,
	<cvs-all@FreeBSD.ORG>
Subject: Re: cvs commit: src/sys/boot/common loader.8 src/sys/conf options
 src/sys/i386/i386 machdep.c src/sys/i386/include param.h src/sys/kern
 subr_param.c src/sys/sys buf.h src/sys/vm swap_pager.c 
References:  <20010820194057.Y54152-100000@besplex.bde.org>
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:Actually, by not updating all copies of this MD include to define
:suitable MD constants for VM_BCACHE_SIZE_MAX and VM_SWZONE_SIZE_MAX.
:These constants need to be MD since the amount of KVM is MD.  Except
:these constants shouldn't exist.  Just use a suitable fraction of total
:KVM.  Alternatively, set these constants to "infinity" by default and
:override them on i386's only.  64-bit machines should have enough KVM
:to map the buffer cache millions of times.
:
:Bruce

    There is no 'suitable fraction'.  That's one of the problems.  If
    you have a machine with 64MB of ram then having 512MB of swap is
    reasonable.  If you have a machine with 4G of them then having 32G
    of swap is typically unreasonable.  Also, the kernel_map, clean_map,
    buffer_map, etc... all the initialization code for these maps is
    *improperly* sitting in machine-dependant sections.  It should be
    machine-indendant sections.  I fixed the buffer map allocation code
    in IA32 because it is the basis for all the dups, and that is the code
    that will eventually be migrated to MI.

						-Matt


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