Date: Tue, 25 Jun 2002 17:51:06 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Peter Wemm <peter@wemm.org> Cc: Alfred Perlstein <bright@mu.org>, Patrick Thomas <root@utility.clubscholarship.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: tunings for many httpds... Message-ID: <3D190FFA.C7AE70BF@mindspring.com> References: <20020626002318.C655D3811@overcee.wemm.org>
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Peter Wemm wrote: > Uhh, Terry, neither form of SHM uses KVA. Either pageable or physically > backed. The memory is only mapped into processes and is NOT mapped into > KVA anywhere. (*) You and Alfred are right. It looks like this was corrected by John Dyson, shortly after he had checked it in to work that way. > The difference between the normal and phys version is that the phys version > uses raw pages and is not pageable. Since it is not pageable, we do not need > PV entries (which are used to remove mappings in other address spaces when > we are forcibly paging out a page). Yes. The difference I was seeing is in the PV entries. I was mistaking this for the other. It has 1/1024th the impact of what I had thought was happening. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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