From: "Serge E. Hallyn" <serue@us.ibm.com>
To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Nathan Lynch <ntl@pobox.com>,
containers <containers@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
hch@infradead.org, Ingo Molnar <mingo@elte.hu>,
Alexey Dobriyan <adobriyan@gmail.com>
Subject: Re: [RFC][PATCH 8/8] check files for checkpointability
Date: Mon, 2 Mar 2009 11:44:33 -0600 [thread overview]
Message-ID: <20090302174433.GA12708@us.ibm.com> (raw)
In-Reply-To: <1236015052.26788.471.camel@nimitz>
Quoting Dave Hansen (dave@linux.vnet.ibm.com):
> On Mon, 2009-03-02 at 11:22 -0600, Nathan Lynch wrote:
> > No.. I mean what if a process 1234 does
> >
> > f = fopen("/proc/1234/stat", "r");
> >
> > and is then checkpointed. Can that path be resolved during restart,
> > before pid 1234 is alive?
>
> Heh, that's a good one.
>
> It does mean that we can't do restore like this:
>
> for_each_cr_task()
> restore_task_struct()
> restore_files()
> ...
>
> We have to do:
>
> for_each_cr_task()
> restore_task_struct()
> for_each_cr_task()
> restore_files()
>
>
> -- Dave
Which is what we actually do, right?
Actually we have userspace create the tasks first, and
then each task calls sys_restart which does restore_files().
-serge
next prev parent reply other threads:[~2009-03-02 17:44 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-27 20:34 [RFC][PATCH 1/8] kill '_data' in cr_hdr_fd_data name Dave Hansen
2009-02-27 20:34 ` [RFC][PATCH 2/8] breakout fdinfo sprintf() into its own function Dave Hansen
2009-02-27 20:56 ` Vegard Nossum
2009-02-27 21:23 ` Dave Hansen
2009-02-27 20:34 ` [RFC][PATCH 3/8] create fs flags to mark c/r supported fs's Dave Hansen
2009-02-27 21:16 ` Alexey Dobriyan
2009-02-27 21:20 ` Dave Hansen
2009-02-27 20:34 ` [RFC][PATCH 4/8] file c/r: expose functions to query fs support Dave Hansen
2009-02-27 21:14 ` Sukadev Bhattiprolu
2009-02-27 21:24 ` Dave Hansen
2009-02-27 21:32 ` Dave Hansen
2009-02-28 1:33 ` Sukadev Bhattiprolu
2009-02-27 20:34 ` [RFC][PATCH 5/8] add f_op for checkpointability Dave Hansen
2009-02-28 2:14 ` Sukadev Bhattiprolu
2009-02-28 2:51 ` Dave Hansen
2009-02-28 20:53 ` Christoph Hellwig
2009-02-28 21:37 ` Dave Hansen
2009-03-01 15:19 ` Serge E. Hallyn
2009-03-02 17:05 ` Dave Hansen
2009-03-03 13:15 ` Christoph Hellwig
2009-03-20 21:13 ` Dave Hansen
2009-03-20 21:30 ` Oren Laadan
2009-02-27 20:34 ` [RFC][PATCH 6/8] mark /dev/null and zero as checkpointable Dave Hansen
2009-02-27 20:34 ` [RFC][PATCH 7/8] add c/r info to fdinfo Dave Hansen
2009-02-27 20:34 ` [RFC][PATCH 8/8] check files for checkpointability Dave Hansen
2009-02-28 2:57 ` Sukadev Bhattiprolu
2009-03-01 17:00 ` Serge E. Hallyn
2009-03-04 23:41 ` Dave Hansen
2009-03-01 19:43 ` Serge E. Hallyn
2009-03-02 13:37 ` Serge E. Hallyn
2009-03-02 15:56 ` Dave Hansen
2009-03-02 15:59 ` Nathan Lynch
2009-03-02 16:27 ` Dave Hansen
2009-03-02 17:22 ` Nathan Lynch
2009-03-02 17:30 ` Dave Hansen
2009-03-02 17:44 ` Serge E. Hallyn [this message]
2009-03-02 17:58 ` Dave Hansen
2009-03-02 18:13 ` Dave Hansen
2009-03-02 18:35 ` Serge E. Hallyn
2009-03-05 8:20 ` Cedric Le Goater
2009-03-02 16:28 ` Serge E. Hallyn
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