From owner-p4-projects@FreeBSD.ORG Tue Sep 30 22:53:09 2003 Return-Path: Delivered-To: p4-projects@freebsd.org Received: by hub.freebsd.org (Postfix, from userid 32767) id C3FBB16A4C1; Tue, 30 Sep 2003 22:53:08 -0700 (PDT) Delivered-To: perforce@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9B80B16A4B3 for ; Tue, 30 Sep 2003 22:53:08 -0700 (PDT) Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2687643FF5 for ; Tue, 30 Sep 2003 22:53:08 -0700 (PDT) (envelope-from imp@freebsd.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.12.9/8.12.9) with ESMTP id h915r7XJ064076 for ; Tue, 30 Sep 2003 22:53:07 -0700 (PDT) (envelope-from imp@freebsd.org) Received: (from perforce@localhost) by repoman.freebsd.org (8.12.9/8.12.9/Submit) id h915r7VL064073 for perforce@freebsd.org; Tue, 30 Sep 2003 22:53:07 -0700 (PDT) (envelope-from imp@freebsd.org) Date: Tue, 30 Sep 2003 22:53:07 -0700 (PDT) Message-Id: <200310010553.h915r7VL064073@repoman.freebsd.org> X-Authentication-Warning: repoman.freebsd.org: perforce set sender to imp@freebsd.org using -f From: Warner Losh To: Perforce Change Reviews Subject: PERFORCE change 38953 for review X-BeenThere: p4-projects@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: p4 projects tree changes List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Oct 2003 05:53:09 -0000 http://perforce.freebsd.org/chv.cgi?CH=38953 Change 38953 by imp@imp_koguchi on 2003/09/30 22:52:38 Document that in FreeBSD 5 the callout wheel locking precludes the race documented here as race #3. Affected files ... .. //depot/doc/strawman-driver.c#9 edit Differences ... ==== //depot/doc/strawman-driver.c#9 (text+ko) ==== @@ -144,4 +144,7 @@ * we can't tell if the code has finished executing or not. This * means that if the code is executing and we try to unload the page * that is executing, then we've set ourselves up for a crash. + * + * However, given how FreeBSD 5 locks the callout code, the race can + * never be lost. */