Date: Tue, 25 Jun 2002 15:09:19 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Alfred Perlstein <bright@mu.org> Cc: Terry Lambert <tlambert2@mindspring.com>, Patrick Thomas <root@utility.clubscholarship.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: tunings for many httpds... Message-ID: <200206252209.g5PM9J79010543@apollo.backplane.com> References: <20020624151650.I68572-100000@utility.clubscholarship.com> <3D17D27A.11E82B2B@mindspring.com> <20020625022238.GH53232@elvis.mu.org> <3D17DBC1.351A8A35@mindspring.com> <20020625072509.GJ53232@elvis.mu.org> <3D18CDB2.151978F3@mindspring.com> <20020625210633.GQ53232@elvis.mu.org>
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:
:This is also the _default_ for how solaris manages sysv segments,
:although it would be nice if we could get the OBJT_PHYS stuff to
:use 4meg pages (unless someone already did that?)...
:
:Anyhow, I'm glad we corrected your misconception and we now have
:a more accurate understanding of how this system works.
:
:-Alfred
Even more importantly it would be nice if we could share compatible
pmap pages, then we would have no need for 4MB pages... 50 mappings
of the same shared memory segment would wind up using the same pmap
pages as if only one mapping had been made. Such a feature would work
for SysV shared memory and for mmap()s. I've looked at doing this
off and on for two years but do not have a sufficient chunk of time
available yet.
-Matt
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