From: Dave Hansen <dave-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
To: Daniel Jacobowitz <dan-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
Cc: Oren Laadan <orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
mingo-X9Un+BFzKDI@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org,
hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org
Subject: Re: [RFC v7][PATCH 2/9] General infrastructure for checkpoint restart
Date: Tue, 21 Oct 2008 20:02:43 -0700 [thread overview]
Message-ID: <1224644563.1848.232.camel@nimitz> (raw)
In-Reply-To: <20081022025513.GA7504-FDxGpBj5bhMn2ysHARXsoQ@public.gmane.org>
On Tue, 2008-10-21 at 22:55 -0400, Daniel Jacobowitz wrote:
> I haven't been following - but why this whole container restriction?
> Checkpoint/restart of individual processes is very useful too.
> There are issues with e.g. IPC, but I'm not convinced they're
> substantially different than the issues already present for a
> container.
Containers provide isolation. Once you have isolation, you have a
discrete set of resources which you can checkpoint/restart.
Let's say you have a process you want to checkpoint. If it uses a
completely discrete IPC namespace, you *know* that nothing else depends
on those IPC ids. We don't even have to worry about who might have been
using them and when.
Also think about pids. Without containers, how can you guarantee a
restarted process that it can regain the same pid?
-- Dave
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next prev parent reply other threads:[~2008-10-22 3:02 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-20 5:40 [RFC v7][PATCH 0/9] Kernel based checkpoint/restart Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 1/9] Create syscalls: sys_checkpoint, sys_restart Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 2/9] General infrastructure for checkpoint restart Oren Laadan
[not found] ` <1224481237-4892-3-git-send-email-orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-21 19:41 ` Andrew Morton
[not found] ` <20081021124130.a002e838.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2008-10-21 20:24 ` Serge E. Hallyn
[not found] ` <20081021202410.GA10423-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-10-21 20:41 ` Andrew Morton
2008-10-22 1:33 ` Oren Laadan
2008-10-22 2:55 ` Daniel Jacobowitz
[not found] ` <20081022025513.GA7504-FDxGpBj5bhMn2ysHARXsoQ@public.gmane.org>
2008-10-22 3:02 ` Dave Hansen [this message]
2008-10-22 14:29 ` Daniel Jacobowitz
[not found] ` <48FE82DF.6030005-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-22 15:28 ` Serge E. Hallyn
[not found] ` <20081022152804.GA23821-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-10-22 16:02 ` Oren Laadan
2008-10-22 17:03 ` Serge E. Hallyn
[not found] ` <20081022170325.GA4908-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2008-10-22 18:32 ` Oren Laadan
2008-10-27 8:27 ` Peter Chubb
[not found] ` <87tzayh27r.wl%peter-LkDQP0DxSMGxwJ88Py/mJxCuuivNXqWP@public.gmane.org>
2008-10-27 11:03 ` Oren Laadan
[not found] ` <49059FED.4030202-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-27 16:42 ` Dave Hansen
2008-10-27 17:11 ` Oren Laadan
[not found] ` <4905F648.4030402-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-27 20:51 ` Matt Helsley
2008-10-27 21:20 ` Serge E. Hallyn
2008-10-27 21:51 ` Oren Laadan
[not found] ` <490637D8.4080404-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-27 22:09 ` Dave Hansen
2008-10-28 18:33 ` Serge E. Hallyn
2008-10-20 5:40 ` [RFC v7][PATCH 3/9] x86 support for checkpoint/restart Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 4/9] Dump memory address space Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 6/9] Checkpoint/restart: initial documentation Oren Laadan
[not found] ` <1224481237-4892-7-git-send-email-orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-28 16:48 ` Michael Kerrisk
[not found] ` <1224481237-4892-1-git-send-email-orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
2008-10-20 5:40 ` [RFC v7][PATCH 5/9] Restore memory address space Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 7/9] Infrastructure for shared objects Oren Laadan
2008-10-21 19:21 ` [RFC v7][PATCH 0/9] Kernel based checkpoint/restart Andrew Morton
[not found] ` <20081021122135.4bce362c.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2008-10-21 20:41 ` Dave Hansen
2008-10-22 9:20 ` Ingo Molnar
[not found] ` <20081022092024.GC12453-X9Un+BFzKDI@public.gmane.org>
2008-10-22 11:51 ` Daniel Lezcano
2008-10-22 11:55 ` Cedric Le Goater
2008-10-20 5:40 ` [RFC v7][PATCH 8/9] Dump open file descriptors Oren Laadan
2008-10-20 5:40 ` [RFC v7][PATCH 9/9] Restore open file descriprtors Oren Laadan
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