From: Daniel Jacobowitz <dan-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
To: Dave Hansen <dave-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@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: Wed, 22 Oct 2008 10:29:07 -0400 [thread overview]
Message-ID: <20081022142907.GA13574@caradoc.them.org> (raw)
In-Reply-To: <1224644563.1848.232.camel@nimitz>
On Tue, Oct 21, 2008 at 08:02:43PM -0700, Dave Hansen wrote:
> 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?
OK, that makes sense. In a lot of simple cases you can get by without
regaining the same pid; there's an implementation of checkpointing in
GDB that works by injecting fork calls into the child, and it is
useful for a reasonable selection of single-threaded programs.
--
Daniel Jacobowitz
CodeSourcery
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next prev parent reply other threads:[~2008-10-22 14:29 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
2008-10-22 14:29 ` Daniel Jacobowitz [this message]
[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
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
[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
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