From owner-svn-src-head@FreeBSD.ORG Mon Dec 14 14:39:14 2009 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 7E5CA1065670; Mon, 14 Dec 2009 14:39:14 +0000 (UTC) (envelope-from luigi@onelab2.iet.unipi.it) Received: from onelab2.iet.unipi.it (onelab2.iet.unipi.it [131.114.59.238]) by mx1.freebsd.org (Postfix) with ESMTP id 3BF9D8FC0A; Mon, 14 Dec 2009 14:39:13 +0000 (UTC) Received: by onelab2.iet.unipi.it (Postfix, from userid 275) id 8872973098; Mon, 14 Dec 2009 15:46:35 +0100 (CET) Date: Mon, 14 Dec 2009 15:46:35 +0100 From: Luigi Rizzo To: Robert Watson Message-ID: <20091214144635.GA91618@onelab2.iet.unipi.it> References: <200912141223.nBECNlDZ026381@svn.freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i Cc: svn-src-head@freebsd.org, Luigi Rizzo , src-committers@freebsd.org, svn-src-all@freebsd.org Subject: Re: svn commit: r200510 - head/sys/kern 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: Mon, 14 Dec 2009 14:39:14 -0000 On Mon, Dec 14, 2009 at 02:18:42PM +0000, Robert Watson wrote: > On Mon, 14 Dec 2009, Luigi Rizzo wrote: ... > > Together with a smaller patch committed in september, this fixes a > > bug that affects 8.0 with apps that rely on callouts to fire exactly > > in the number of ticks specified (qemu among them). > > Right now, callouts in 8.0 fire one tick late. > > > > This was discussed in september with JeffR and jhb > > Once this has burned in, is it something you would consider appropriate to > be an errata note candidate? i have no objection, but at the time someone commented that callouts do not _guarantee_ when they will run so strictly speaking this is not a bug (i do think that being always a tick late _is_ a bug). cheers luigi