From owner-cvs-src@FreeBSD.ORG  Thu Feb  2 21:37:43 2006
Return-Path: <owner-cvs-src@FreeBSD.ORG>
X-Original-To: cvs-src@FreeBSD.org
Delivered-To: cvs-src@FreeBSD.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 9998516A420;
	Thu,  2 Feb 2006 21:37:43 +0000 (GMT)
	(envelope-from tegge@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP id CC51E43D6A;
	Thu,  2 Feb 2006 21:37:39 +0000 (GMT)
	(envelope-from tegge@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.1/8.13.1) with ESMTP id k12LbdOg023315;
	Thu, 2 Feb 2006 21:37:39 GMT
	(envelope-from tegge@repoman.freebsd.org)
Received: (from tegge@localhost)
	by repoman.freebsd.org (8.13.1/8.13.1/Submit) id k12Lbd2b023314;
	Thu, 2 Feb 2006 21:37:39 GMT (envelope-from tegge)
Message-Id: <200602022137.k12Lbd2b023314@repoman.freebsd.org>
From: Tor Egge <tegge@FreeBSD.org>
Date: Thu, 2 Feb 2006 21:37:39 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/kern vfs_bio.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 02 Feb 2006 21:37:43 -0000

tegge       2006-02-02 21:37:39 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             vfs_bio.c 
  Log:
  For low memory situations, non-VMIO buffers didnt't release pages back to
  the system when brelse() was called with B_RELBUF set on the buffer.  This
  could be a problem when the system was low on memory, had many buffers on
  QUEUE_EMPTYKVA and started to traverse directories.  For each getnewbuf(),
  pages were allocated from the system, driving the free reserve downwards.
  For each brelse(), the system put the buffer on QUEUE_CLEAN, with B_INVAL
  set.
  
  This commit changes the semantics of B_RELBUF to also free pages from
  non-VMIO buffers.
  
  Reviewed by:    alc
  
  Revision  Changes    Path
  1.503     +5 -0      src/sys/kern/vfs_bio.c