From owner-freebsd-current Sun Oct 27 18:51:40 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E735437B401; Sun, 27 Oct 2002 18:51:39 -0800 (PST) Received: from axe-inc.co.jp (axegw.axe-inc.co.jp [61.199.217.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8915643E4A; Sun, 27 Oct 2002 18:51:38 -0800 (PST) (envelope-from tanimura@axe-inc.co.jp) Received: from t-axegw.t.axe-inc.co.jp ([218.230.241.250]) by axe-inc.co.jp (8.9.3+3.2W/3.7W) with ESMTP id LAA09351; Mon, 28 Oct 2002 11:51:23 +0900 (JST) Received: from shojaku.t.axe-inc.co.jp ([192.168.6.103]) by t-axegw.t.axe-inc.co.jp (8.12.6/3.7W-Axe-Gwhost-Tokyo) with ESMTP id g9S2oq14081274 ; Mon, 28 Oct 2002 11:50:52 +0900 (JST) Received: from shojaku.t.axe-inc.co.jp.t.axe-inc.co.jp (localhost [127.0.0.1]) by shojaku.t.axe-inc.co.jp (8.12.6/3.7W-Axe-Tokyo-NoARR) with ESMTP id g9S2oqoK077311 ; Mon, 28 Oct 2002 11:50:52 +0900 (JST) Message-Id: <200210280250.g9S2oqoK077311@shojaku.t.axe-inc.co.jp> Date: Mon, 28 Oct 2002 11:50:52 +0900 From: Seigo Tanimura To: Bruce Evans Cc: Julian Elischer , Jeff Roberson , Seigo Tanimura , , Subject: Re: Dynamic growth of the buffer and buffer page reclaim In-Reply-To: <20021024143639.P25932-100000@gamplex.bde.org> References: <20021024143639.P25932-100000@gamplex.bde.org> User-Agent: Wanderlust/2.8.1 (Something) SEMI/1.14.4 (Hosorogi) FLIM/1.14.4 (=?ISO-8859-1?Q?Kashiharajing=FE-mae?=) APEL/10.3 MULE XEmacs/21.1 (patch 14) (Cuyahoga Valley) (i386--freebsd) Organization: AXE, Inc. MIME-Version: 1.0 (generated by SEMI 1.14.4 - "Hosorogi") Content-Type: text/plain; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thu, 24 Oct 2002 15:05:30 +1000 (EST), Bruce Evans said: bde> Almost exactly what we have. It turns out to be not very good, at least bde> in its current implementation, since remapping is too expensive. Things bde> work OK to the extent that remapping is not required, but so would a bde> much simpler implementation that uses less vm and more copying of data bde> (copying seems to be faster than remapping). Which process is expensive in remapping? Allocation of a KVA space? Page wiring? Or pmap operation? -- Seigo Tanimura To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message