linux-kernel - Re: [RFC v17][PATCH 00/60] Kernel based checkpoint/restart

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Message-ID: <20090724190953.GA22641@us.ibm.com>
Date:	Fri, 24 Jul 2009 14:09:53 -0500
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Oren Laadan <orenl@...rato.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...l.org>,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-api@...r.kernel.org, Dave Hansen <dave@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: [RFC v17][PATCH 00/60] Kernel based checkpoint/restart

Quoting Oren Laadan (orenl@...rato.com):
> Application checkpoint/restart (c/r) is the ability to save the state
> of a running application so that it can later resume its execution
> from the time at which it was checkpointed, on the same or a different
> machine.
> 
> This version introduces 'clone_with_pids()' syscall to preset pid(s)
> for a child process. It is used by restart(2) to recreate process
> hierarchy with the same pids as at checkpoint time.
> 
> It also adds a freezer state CHECKPOINTING to safeguard processes
> during a checkpoint. Other important changes include support for
> threads and zombies, credentials, signal handling, and improved
> restart logic. See below for a more detailed changelog.
> 
> Compiled and tested against v2.6.31-rc3.

With the s390 patch I recently sent on top of this set, all of my
c/r tests pass, and ltp behaves the same as on plain v2.6.31-rc3
(up to and including hanging on mallocstress).

-serge
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