From owner-freebsd-bugs@FreeBSD.ORG Wed Mar 15 18:20:14 2006 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A38E116A41F for ; Wed, 15 Mar 2006 18:20:14 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5BB3E43D48 for ; Wed, 15 Mar 2006 18:20:13 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id k2FIKDKA000873 for ; Wed, 15 Mar 2006 18:20:13 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id k2FIKDYd000827; Wed, 15 Mar 2006 18:20:13 GMT (envelope-from gnats) Resent-Date: Wed, 15 Mar 2006 18:20:13 GMT Resent-Message-Id: <200603151820.k2FIKDYd000827@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Thomas Hurst Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2516016A41F for ; Wed, 15 Mar 2006 18:17:13 +0000 (UTC) (envelope-from freaky@voi.aagh.net) Received: from spork.qfe3.net (spork.qfe3.net [212.13.207.101]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0A3F943D4C for ; Wed, 15 Mar 2006 18:17:09 +0000 (GMT) (envelope-from freaky@voi.aagh.net) Received: from [81.104.54.68] (helo=voi.aagh.net) by spork.qfe3.net with esmtp (Exim 4.60 (FreeBSD)) (envelope-from ) id 1FJaYW-0005y6-Lw for FreeBSD-gnats-submit@freebsd.org; Wed, 15 Mar 2006 18:17:08 +0000 Received: from freaky by voi.aagh.net with local (Exim 4.54 (FreeBSD)) id 1FJaYW-000De5-Gm for FreeBSD-gnats-submit@freebsd.org; Wed, 15 Mar 2006 18:17:08 +0000 Message-Id: Date: Wed, 15 Mar 2006 18:17:08 +0000 From: Thomas Hurst Sender: Thomas Hurst To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: conf/94509: Setting PMAP_SHPGPERPROC in kernel config has no effect X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Thomas Hurst List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Mar 2006 18:20:14 -0000 >Number: 94509 >Category: conf >Synopsis: Setting PMAP_SHPGPERPROC in kernel config has no effect >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Mar 15 18:20:07 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Thomas Hurst >Release: FreeBSD 6.1-PRERELEASE amd64 >Organization: Newzbin Limited >Environment: System: FreeBSD search1.newzbin.com 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #0: Wed Mar 15 16:25:27 UTC 2006 root@search1.newzbin.com:/usr/obj/usr/src/sys/X4100_SEARCHSERVER amd64 >Description: This machine has a process group which shares ~2GB of anonymous memory between a bunch of processes, resulting in: "collecting pv entries -- suggest increasing PMAP_SHPGPERPROC" Setting "options PMAP_SHPGPERPROC=400" in amd64 kernel config has no effect, meaning I had to edit amd64/pmap.c directly to increase the available PV entries. >How-To-Repeat: Check upper limit on sysctl vm.zone | grep PV Set PMAP_SHPGPERPROC in kernel config to a value != 200. Recompile/install kernel. Recheck limit, find it hasn't changed. Verified on 2 different amd64 systems, both running very recent RELENG_6. >Fix: Workaround is to edit the constant in /sys/amd64/amd64/pmap.c directly >Release-Note: >Audit-Trail: >Unformatted: