From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1FKMTv-0007Bn-99 for user-mode-linux-devel@lists.sourceforge.net; Fri, 17 Mar 2006 13:27:35 -0800 Received: from host.almesberger.net ([204.10.140.10]) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1FKMTu-0003ZI-0h for user-mode-linux-devel@lists.sourceforge.net; Fri, 17 Mar 2006 13:27:35 -0800 From: Werner Almesberger Subject: Re: [uml-devel] Occasional hang starting up. Message-ID: <20060317182722.B8529@almesberger.net> References: <200603111301.42195.rob@landley.net> <20060314202249.GB22286@ccure.user-mode-linux.org> <20060316112251.A17140@almesberger.net> <200603172036.59218.blaisorblade@yahoo.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200603172036.59218.blaisorblade@yahoo.it>; from blaisorblade@yahoo.it on Fri, Mar 17, 2006 at 08:36:58PM +0100 Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Fri, 17 Mar 2006 18:27:23 -0300 To: Blaisorblade Cc: user-mode-linux-devel@lists.sourceforge.net, Jeff Dike , Rob Landley Blaisorblade wrote: > 1) I'll try to fix poll(2) to return -EINVAL. Dunno whether anyone will say > "no, the app is stupid, it deserves no error", but hope not (with "try" I > refer to this). Attached patch should do this. I think the behaviour of "poll" with nfds = 0 is correct as it is. At least POSIX doesn't say anything to the extent that "nfds" couldn't be zero: http://www.opengroup.org/onlinepubs/009695399/functions/poll.html Furthermore, this is one of several ways to implement a "sleep" function with sub-second granularity, so existing applications may already depend on "poll" accepting nfds = 0. (Of course, they would probably be better off using "nanosleep".) > 2) write_sigio_thread should do a "down" on a semaphore/mutex and the first > update_thread should "up" it. Yup :-) Thanks, - Werner -- _________________________________________________________________________ / Werner Almesberger, Buenos Aires, Argentina wa@almesberger.net / /_http://www.almesberger.net/____________________________________________/ ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel