From owner-freebsd-current Sun Nov 26 22:41:27 1995 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id WAA06779 for current-outgoing; Sun, 26 Nov 1995 22:41:27 -0800 Received: from bunyip.cc.uq.oz.au (pp@bunyip.cc.uq.oz.au [130.102.2.1]) by freefall.freebsd.org (8.6.12/8.6.6) with SMTP id WAA06774 for ; Sun, 26 Nov 1995 22:41:18 -0800 Received: from cc.uq.oz.au by bunyip.cc.uq.oz.au id <22575-0@bunyip.cc.uq.oz.au>; Mon, 27 Nov 1995 16:23:04 +1000 Received: from netfl15a.devetir.qld.gov.au by pandora.devetir.qld.gov.au (8.6.10/DEVETIR-E0.3a) with ESMTP id QAA10134 for ; Mon, 27 Nov 1995 16:28:35 +1000 Received: from localhost by netfl15a.devetir.qld.gov.au (8.6.8.1/DEVETIR-0.1) id GAA00550 for ; Mon, 27 Nov 1995 06:28:51 GMT Message-Id: <199511270628.GAA00550@netfl15a.devetir.qld.gov.au> X-Mailer: exmh version 1.6.4 10/10/95 To: current@freebsd.org Subject: Prioritised disk requests X-Face: 3}heU+2?b->-GSF-G4T4>jEB9~FR(V9lo&o>kAy=Pj&;oVOc<|pr%I/VSG"ZD32J>5gGC0N 7gj]^GI@M:LlqNd]|(2OxOxy@$6@/!,";-!OlucF^=jq8s57$%qXd/ieC8DhWmIy@J1AcnvSGV\|*! >Bvu7+0h4zCY^]{AxXKsDTlgA2m]fX$W@'8ev-Qi+-;%L'CcZ'NBL!@n?}q!M&Em3*eW7,093nOeV8 M)(u+6D;%B7j\XA/9j4!Gj~&jYzflG[#)E9sI&Xe9~y~Gn%fA7>F:YKr"Wx4cZU*6{^2ocZ!YyR Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 27 Nov 1995 16:28:50 +1000 From: Stephen Hocking Sender: owner-current@freebsd.org Precedence: bulk Has anyone thought of a mechanism (similar to stuff I've seen on Masscomp machines) where one could indicate that a particular stream of disk I/O had a higher priority than normal? Masscomp used to have a B_URGENT flag for these blocks in the buffer cache (for semi-realtime I/O when acquiring or transmitting data). CD burners could do with this, or people trying to keep tapes streaming on backups. Stephen -- I do not speak for the Worker's Compensation Board of Queensland - They don't pay me enough for that!