From owner-freebsd-questions@FreeBSD.ORG Sat Nov 19 00:37:55 2005 Return-Path: X-Original-To: questions@freebsd.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D90C416A41F for ; Sat, 19 Nov 2005 00:37:55 +0000 (GMT) (envelope-from mi+mx@aldan.algebra.com) Received: from vms044pub.verizon.net (vms044pub.verizon.net [206.46.252.44]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4630743D45 for ; Sat, 19 Nov 2005 00:37:55 +0000 (GMT) (envelope-from mi+mx@aldan.algebra.com) Received: from corbulon.video-collage.com ([151.204.231.237]) by vms044.mailsrvcs.net (Sun Java System Messaging Server 6.2-4.02 (built Sep 9 2005)) with ESMTPA id <0IQ600427F36LXJ0@vms044.mailsrvcs.net> for questions@freebsd.org; Fri, 18 Nov 2005 18:37:54 -0600 (CST) Received: from mteterin.us.murex.com (195-11.customer.cloud9.net [168.100.195.11]) by corbulon.video-collage.com (8.13.4/8.13.1) with ESMTP id jAJ0boSM004753 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 18 Nov 2005 19:37:53 -0500 Received: from mteterin.us.murex.com (mteterin@localhost [127.0.0.1]) by mteterin.us.murex.com (8.13.4/8.13.4) with ESMTP id jAJ0bh4Y080256; Fri, 18 Nov 2005 19:37:43 -0500 Received: from localhost (localhost [[UNIX: localhost]]) by mteterin.us.murex.com (8.13.4/8.13.4/Submit) id jAJ0bfiR080255; Fri, 18 Nov 2005 19:37:41 -0500 Date: Fri, 18 Nov 2005 19:37:41 -0500 From: Mikhail Teterin To: questions@freebsd.org Message-id: <200511181937.41380.mi+mx@aldan.algebra.com> Organization: Virtual Estates, Inc. MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit Content-disposition: inline X-Virus-Scanned: ClamAV devel-20050525/1179/Fri Nov 18 12:33:40 2005 on corbulon.video-collage.com X-Virus-Status: Clean X-Scanned-By: MIMEDefang 2.43 X-Authentication-warning: mteterin.us.murex.com: mteterin set sender to mi+mx@aldan.algebra.com using -f User-Agent: KMail/1.8.2 Cc: Subject: does madvise() have effect on mmap-ed regions? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Nov 2005 00:37:56 -0000 Would something like `fgrep --mmap' benefit from madvise-ing the kernel, that the mmap-ed region (the input file) will be used sequentionally (MADV_SEQUENTIONAL) and covering the already searched parts with MADV_DONTNEED|MADV_FREE? Thanks! -mi