From owner-freebsd-hackers Tue Jun 25 17:52: 7 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from scaup.mail.pas.earthlink.net (scaup.mail.pas.earthlink.net [207.217.120.49]) by hub.freebsd.org (Postfix) with ESMTP id 2AB3E37B400 for ; Tue, 25 Jun 2002 17:52:02 -0700 (PDT) Received: from pool0435.cvx40-bradley.dialup.earthlink.net ([216.244.43.180] helo=mindspring.com) by scaup.mail.pas.earthlink.net with esmtp (Exim 3.33 #2) id 17N12E-0006kL-00; Tue, 25 Jun 2002 17:51:50 -0700 Message-ID: <3D190FFA.C7AE70BF@mindspring.com> Date: Tue, 25 Jun 2002 17:51:06 -0700 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Peter Wemm Cc: Alfred Perlstein , Patrick Thomas , freebsd-hackers@FreeBSD.ORG Subject: Re: tunings for many httpds... References: <20020626002318.C655D3811@overcee.wemm.org> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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