From mboxrd@z Thu Jan 1 00:00:00 1970 From: sukadev-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org Subject: Re: [patch -mm 1/5] mqueue namespace : add struct mq_namespace Date: Wed, 3 Oct 2007 10:09:30 -0700 Message-ID: <20071003170930.GB338@us.ibm.com> References: <47020A29.9060403@sw.ru> <470219BC.3050702@fr.ibm.com> <470237C7.5000902@fr.ibm.com> <20071002163020.GA11207@us.ibm.com> <47034868.5010505@fr.ibm.com> <20071003135955.GA7934@sergelap.austin.ibm.com> <4703A30F.2010007@fr.ibm.com> <20071003165644.GA338@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: "Eric W. Biederman" Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Cedric Le Goater , "Denis V. Lunev" List-Id: containers.vger.kernel.org Eric W. Biederman [ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org] wrote: | sukadev-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org writes: | | > Cedric Le Goater [clg-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org] wrote: | > | > I think you and Eric (and I) are disagreeing about those limitations. | > | > You take it for granted that a sibling pidns is off limits for signals. | > | > But the signal wasn't sent using a pid, but using a file (in SIGIO | > | > case). So since the fs was shared, the signal should be sent. An | > | > event happened, and the receiver wants to know about it. | > | | > | seen that way I agree. | > | | > | si_code is set to SI_MESGQ, but what do we put in si_pid ? 0 ? | > | | > | we could use the si_errno to pass extra info, like the sending process | > | lives in a // world ... | > | > Does the receiver need to know that sender is in a // world ? | | What is a // world ? Parallel world/universe :-) I am assuming Cedric used that to refer to a sibling pid ns. | | Eric