From owner-cvs-all@FreeBSD.ORG Thu Jun 7 16:04:24 2007 Return-Path: X-Original-To: cvs-all@FreeBSD.org Delivered-To: cvs-all@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D1F4316A41F; Thu, 7 Jun 2007 16:04:24 +0000 (UTC) (envelope-from marcel@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [69.147.83.41]) by mx1.freebsd.org (Postfix) with ESMTP id AC09513C487; Thu, 7 Jun 2007 16:04:24 +0000 (UTC) (envelope-from marcel@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.13.8/8.13.8) with ESMTP id l57G4OtR009273; Thu, 7 Jun 2007 16:04:24 GMT (envelope-from marcel@repoman.freebsd.org) Received: (from marcel@localhost) by repoman.freebsd.org (8.13.8/8.13.8/Submit) id l57G4Oa6009262; Thu, 7 Jun 2007 16:04:24 GMT (envelope-from marcel) Message-Id: <200706071604.l57G4Oa6009262@repoman.freebsd.org> From: Marcel Moolenaar Date: Thu, 7 Jun 2007 16:04:23 +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/ia64/ia64 pmap.c X-BeenThere: cvs-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the entire tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jun 2007 16:04:24 -0000 marcel 2007-06-07 16:04:23 UTC FreeBSD src repository Modified files: sys/ia64/ia64 pmap.c Log: Eliminate pmap_install(), which was used to wrap pmap_switch() and grab sched_lock. This would serialize calls to pmap_switch from cpu_switch(). With the introduction of thread_lock, this is not possible anymore, because thread_lock is not a single lock. It varies. Secondly and most importantly, it's not needed at all. The only requirement for pmap_switch() is that it's not preempted while in the middle of updating the CPU and PCPU. In other words, it's a critical region. No locking required. Revision Changes Path 1.189 +43 -55 src/sys/ia64/ia64/pmap.c