From owner-freebsd-hackers@FreeBSD.ORG  Mon Dec  5 04:24:22 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id B2E6616A41F
	for <freebsd-hackers@freebsd.org>; Mon,  5 Dec 2005 04:24:22 +0000 (GMT)
	(envelope-from saggarwa@cs.utah.edu)
Received: from mail-svr1.cs.utah.edu (mail-svr1.cs.utah.edu [155.98.64.200])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 5559143D5A
	for <freebsd-hackers@freebsd.org>; Mon,  5 Dec 2005 04:24:22 +0000 (GMT)
	(envelope-from saggarwa@cs.utah.edu)
Received: from localhost (localhost [127.0.0.1])
	by mail-svr1.cs.utah.edu (Postfix) with ESMTP id C526E346ED
	for <freebsd-hackers@freebsd.org>; Sun,  4 Dec 2005 21:24:20 -0700 (MST)
Received: from mail-svr1.cs.utah.edu ([127.0.0.1])
	by localhost (mail-svr1.cs.utah.edu [127.0.0.1]) (amavisd-new,
	port 10024) with ESMTP id 20256-04 for <freebsd-hackers@freebsd.org>;
	Sun,  4 Dec 2005 21:24:20 -0700 (MST)
Received: from antitrust.cs.utah.edu (antitrust.cs.utah.edu [155.98.65.29])
	by mail-svr1.cs.utah.edu (Postfix) with ESMTP id 64C69346DE
	for <freebsd-hackers@freebsd.org>; Sun,  4 Dec 2005 21:24:20 -0700 (MST)
Received: by antitrust.cs.utah.edu (Postfix, from userid 4973)
	id 426F1108E41; Sun,  4 Dec 2005 21:24:20 -0700 (MST)
Received: from localhost (localhost [127.0.0.1])
	by antitrust.cs.utah.edu (Postfix) with ESMTP id 34468108E40
	for <freebsd-hackers@freebsd.org>; Sun,  4 Dec 2005 21:24:20 -0700 (MST)
Date: Sun, 4 Dec 2005 21:24:20 -0700 (MST)
From: Siddharth Aggarwal <saggarwa@cs.utah.edu>
To: freebsd-hackers@freebsd.org
Message-ID: <Pine.LNX.4.61.0512042121430.18990@antitrust.cs.utah.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Virus-Scanned: amavisd-new at cs.utah.edu
Subject: freeing disk block in 4.x kernel
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 05 Dec 2005 04:24:22 -0000


Hi,

I am trying to find out where in the kernel code blocks on disk are freed. 
I want to track all the blocks freed on the disk as a result of file 
deletes etc., in my pseudo disk driver. 
Is there an equivalent of a blockfree() or something in the 4.x kernel 
code, where I can put a hook into my driver?

Thanks,
Sid.