From owner-freebsd-threads@FreeBSD.ORG Sat Apr 5 23:47:38 2003 Return-Path: Delivered-To: freebsd-threads@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 895A437B401; Sat, 5 Apr 2003 23:47:38 -0800 (PST) Received: from sccrmhc03.attbi.com (sccrmhc03.attbi.com [204.127.202.63]) by mx1.FreeBSD.org (Postfix) with ESMTP id D09D343FAF; Sat, 5 Apr 2003 23:47:37 -0800 (PST) (envelope-from julian@elischer.org) Received: from interjet.elischer.org (12-232-168-4.client.attbi.com[12.232.168.4]) by sccrmhc03.attbi.com (sccrmhc03) with ESMTP id <2003040607473600300p70c0e>; Sun, 6 Apr 2003 07:47:36 +0000 Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id XAA49892; Sat, 5 Apr 2003 23:47:35 -0800 (PST) Date: Sat, 5 Apr 2003 23:47:34 -0800 (PST) From: Julian Elischer To: DavidXu In-Reply-To: <001401c2fbeb$6d496c90$0701a8c0@xu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-threads@freebsd.org Subject: Re: PS_BLOCKED X-BeenThere: freebsd-threads@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Threading on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Apr 2003 07:47:38 -0000 On Sun, 6 Apr 2003, DavidXu wrote: > Daniel, > > I saw your code in thr_kern.c assumes that a blocked thread > in kernel will always be returned in same upcall(your userland > kse)? However, current kernel will returned this context in one > of upcall in the same ksegrp, so there is race in your code, > I think this may be a kernel bug but not yours, this does not > very respects original paper. it has always been said that a blocked thread will have its context returned on any KSE(upcall) in that group. (the next one) > > > David Xu >