From owner-svn-src-head@FreeBSD.ORG Fri Sep 17 07:14:07 2010 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7FB891065672; Fri, 17 Sep 2010 07:14:07 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 6F8D98FC16; Fri, 17 Sep 2010 07:14:07 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o8H7E7Mi021548; Fri, 17 Sep 2010 07:14:07 GMT (envelope-from avg@svn.freebsd.org) Received: (from avg@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id o8H7E7qL021546; Fri, 17 Sep 2010 07:14:07 GMT (envelope-from avg@svn.freebsd.org) Message-Id: <201009170714.o8H7E7qL021546@svn.freebsd.org> From: Andriy Gapon Date: Fri, 17 Sep 2010 07:14:07 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r212780 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Sep 2010 07:14:07 -0000 Author: avg Date: Fri Sep 17 07:14:07 2010 New Revision: 212780 URL: http://svn.freebsd.org/changeset/base/212780 Log: zfs arc_reclaim_needed: more reasonable threshold for available pages vm_paging_target() is not a trigger of any kind for pageademon, but rather a "soft" target for it when it's already triggered. Thus, trying to keep 2048 pages above that level at the expense of ARC was simply driving ARC size into the ground even with normal memory loads. Instead, use a threshold at which a pagedaemon scan is triggered, so that ARC reclaiming helps with pagedaemon's task, but the latter still recycles active and inactive pages. PR: kern/146410, kern/138790 MFC after: 3 weeks Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Fri Sep 17 04:55:01 2010 (r212779) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Fri Sep 17 07:14:07 2010 (r212780) @@ -2161,10 +2161,10 @@ arc_reclaim_needed(void) return (0); /* - * If pages are needed or we're within 2048 pages - * of needing to page need to reclaim + * Cooperate with pagedaemon when it's time for it to scan + * and reclaim some pages. */ - if (vm_pages_needed || (vm_paging_target() > -2048)) + if (vm_paging_need()) return (1); #if 0