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From: "Serge E. Hallyn" <serue@us.ibm.com>
To: Greg Kurz <gkurz@fr.ibm.com>
Cc: Chris Friesen <cfriesen@nortel.com>,
	arnd@arndb.de, containers@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org,
	Dave Hansen <dave@linux.vnet.ibm.com>,
	Ingo Molnar <mingo@elte.hu>, Daniel Lezcano <dlezcano@fr.ibm.com>
Subject: Re: [RFC][PATCH 1/2] Track in-kernel when we expect checkpoint/restart to work
Date: Mon, 13 Oct 2008 11:46:00 -0500	[thread overview]
Message-ID: <20081013164559.GA31636@us.ibm.com> (raw)
In-Reply-To: <1223885897.4404.5.camel@localhost.localdomain>

Quoting Greg Kurz (gkurz@fr.ibm.com):
> On Fri, 2008-10-10 at 11:18 -0600, Chris Friesen wrote:
> > Greg Kurz wrote:
> > 
> > > This flag is weak... testing it gives absolutly no hint whether the
> > > checkpoint may succeed or not. As it is designed now, a user can only be
> > > aware that checkpoint is *forever* denied. I agree that it's only useful
> > > as a "flexible CR todo list".
> > 
> > I don't think it's true that it gives "absolutly no hint".
> > 
> > If the flag is not set, then checkpoint will succeed, right?  Whereas if 
> 
> Wrong. Unless you test_and_checkpoint atomically, the flag doesn't help.

Atomically wrt what?  Presumably you test and checkpoint while the
container is frozen...

> > the flag is set, then it's an indication that checkpoint could fail (but 
> > may still succeed if whatever condition caused the flag to be set is no 
> > longer true).
> > 
> > Chris
> > 
> -- 
> Gregory Kurz                                     gkurz@fr.ibm.com
> Software Engineer @ IBM/Meiosys                  http://www.ibm.com
> Tel +33 (0)534 638 479                           Fax +33 (0)561 400 420
> 
> "Anarchy is about taking complete responsibility for yourself."
>         Alan Moore.
> 
> _______________________________________________
> Containers mailing list
> Containers@lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/containers

  reply	other threads:[~2008-10-13 16:46 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-09 19:04 [RFC][PATCH 1/2] Track in-kernel when we expect checkpoint/restart to work Dave Hansen
2008-10-09 19:04 ` [RFC][PATCH 2/2] first callers of process_deny_checkpoint() Dave Hansen
2008-10-09 19:04 ` Dave Hansen
2008-10-09 19:43   ` Serge E. Hallyn
2008-10-09 19:43   ` Serge E. Hallyn
2008-10-09 20:54     ` Dave Hansen
2008-10-10  8:46       ` Ingo Molnar
2008-10-10  8:46         ` Ingo Molnar
2008-10-10 13:17         ` Rafael J. Wysocki
     [not found]           ` <200810101517.17809.rjw-KKrjLPT3xs0@public.gmane.org>
2008-10-10 14:54             ` Ingo Molnar
2008-10-10 14:54           ` Ingo Molnar
2008-10-10 19:53             ` Rafael J. Wysocki
     [not found]               ` <200810102153.45174.rjw-KKrjLPT3xs0@public.gmane.org>
2008-10-10 19:53                 ` Ingo Molnar
2008-10-10 19:53               ` Ingo Molnar
     [not found]                 ` <20081010195339.GA509-X9Un+BFzKDI@public.gmane.org>
2008-10-10 20:40                   ` Len Brown
2008-10-10 22:57                   ` Rafael J. Wysocki
2008-10-10 20:40                 ` Len Brown
2008-10-10 22:57                 ` Rafael J. Wysocki
     [not found]             ` <20081010145422.GE11695-X9Un+BFzKDI@public.gmane.org>
2008-10-10 19:53               ` Rafael J. Wysocki
     [not found]         ` <20081010084614.GA319-X9Un+BFzKDI@public.gmane.org>
2008-10-10 13:17           ` Rafael J. Wysocki
2008-10-11 13:48           ` Pavel Machek
2008-10-11 13:48         ` Pavel Machek
2008-10-11 15:00           ` Ingo Molnar
     [not found]           ` <20081011134803.GA1483-+ZI9xUNit7I@public.gmane.org>
2008-10-11 15:00             ` Ingo Molnar
2008-10-10 10:27       ` Cedric Le Goater
2008-10-10 10:27       ` Cedric Le Goater
     [not found]     ` <20081009194350.GA31214-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-10-09 20:54       ` Dave Hansen
2008-10-10  8:41   ` Daniel Lezcano
2008-10-10  8:41   ` Daniel Lezcano
2008-10-10 10:17   ` Cedric Le Goater
     [not found]     ` <48EF2BAB.1010009-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
2008-10-10 14:04       ` Serge E. Hallyn
2008-10-10 14:04     ` Serge E. Hallyn
     [not found]       ` <20081010140430.GA14640-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-10-10 16:45         ` Greg Kurz
2008-10-10 16:45       ` Greg Kurz
2008-10-10 17:13         ` Serge E. Hallyn
     [not found]         ` <1223657132.10017.42.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2008-10-10 17:13           ` Serge E. Hallyn
2008-10-10 17:28           ` Dave Hansen
2008-10-10 17:28         ` Dave Hansen
2008-10-13  8:20           ` Greg Kurz
2008-10-13  8:20           ` Greg Kurz
2008-10-10 10:17   ` Cedric Le Goater
2008-10-10  8:20 ` [RFC][PATCH 1/2] Track in-kernel when we expect checkpoint/restart to work Greg Kurz
2008-10-10  8:20 ` Greg Kurz
2008-10-10  8:37   ` Daniel Lezcano
2008-10-10 10:11     ` Oren Laadan
     [not found]     ` <48EF144D.1050906-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
2008-10-10  8:47       ` Greg Kurz
2008-10-10  8:47         ` Greg Kurz
2008-10-10 10:11       ` Oren Laadan
2008-10-10 14:59       ` Ingo Molnar
2008-10-10 16:33       ` Dave Hansen
2008-10-10 16:33         ` Dave Hansen
2008-10-10 14:59     ` Ingo Molnar
2008-10-10 15:17       ` Oren Laadan
2008-10-10 15:28         ` Ingo Molnar
     [not found]         ` <48EF7211.2000303-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-10 15:28           ` Ingo Molnar
2008-10-10 16:34           ` Greg Kurz
2008-10-10 16:34         ` Greg Kurz
     [not found]           ` <1223656489.10017.33.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2008-10-10 16:36             ` Dave Hansen
2008-10-10 16:36               ` Dave Hansen
2008-10-10 20:57               ` Daniel Lezcano
2008-10-10 20:57               ` Daniel Lezcano
2008-10-10 17:18             ` Chris Friesen
2008-10-10 17:18           ` Chris Friesen
     [not found]             ` <48EF8E77.8050000-ZIRUuHA3oDzQT0dZR+AlfA@public.gmane.org>
2008-10-13  8:18               ` Greg Kurz
2008-10-13  8:18             ` Greg Kurz
2008-10-13 16:46               ` Serge E. Hallyn [this message]
     [not found]               ` <1223885897.4404.5.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2008-10-13 16:46                 ` Serge E. Hallyn
     [not found]       ` <20081010145934.GF11695-X9Un+BFzKDI@public.gmane.org>
2008-10-10 15:17         ` Oren Laadan
     [not found]   ` <1223626834.8787.8.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2008-10-10  8:37     ` Daniel Lezcano
  -- strict thread matches above, loose matches on Subject: below --
2008-10-09 19:04 Dave Hansen

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