From: Cyrill Gorcunov <gorcunov@gmail.com>
To: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Kyle Moffett <kyle@moffetthome.net>, Tejun Heo <tj@kernel.org>,
Pavel Emelyanov <xemul@parallels.com>,
Glauber Costa <glommer@parallels.com>,
Andi Kleen <andi@firstfloor.org>,
Matt Helsley <matthltc@us.ibm.com>,
Pekka Enberg <penberg@kernel.org>,
Eric Dumazet <eric.dumazet@gmail.com>,
Vasiliy Kulikov <segoon@openwall.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Herbert Xu <herbert@gondor.hengli.com.au>,
"David S. Miller" <davem@davemloft.net>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Andrey Vagin <avagin@openvz.org>
Subject: Re: [RFC] on general object IDs again
Date: Wed, 11 Jan 2012 21:59:52 +0400 [thread overview]
Message-ID: <20120111175952.GI466@moon> (raw)
In-Reply-To: <CAHGf_=r1vrZbCTYNAp7e+Hbbxh2BnDXXrdsNckSkQVVrXQ=9KQ@mail.gmail.com>
On Wed, Jan 11, 2012 at 12:25:04PM -0500, KOSAKI Motohiro wrote:
> > In turn doing everything in a manner of syscall "compare resources of two pids"
> > gives up very slow speed because we will have to compare every pid resources
> > with every other pids we're checkpointing.
>
> Could you please write down pseudo code of your userland compare logic? When
> and why do you need? I still don't like this idea, but maybe I need to
> understand your
> requerement before putting negative comments.
>
Hi Kosaki,
the idea on user-space is something like
- collect all pids to dump
- collect IDs for every pid
- sort the IDs obtained
- find the same IDs (which will be kind of find intersections in a sets of IDs) and
set up CLONE_ flags on restore procedure as appropriate (for example if
GEN_OBJ_ID_VM IDs for two or more tasks are the same we need to use CLONE_VM
at restore time, and so on).
Cyrill
next prev parent reply other threads:[~2012-01-11 17:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-11 16:19 [RFC] on general object IDs again Cyrill Gorcunov
2012-01-11 17:25 ` KOSAKI Motohiro
2012-01-11 17:59 ` Cyrill Gorcunov [this message]
2012-01-11 18:19 ` KOSAKI Motohiro
2012-01-11 18:22 ` Pavel Emelyanov
2012-01-11 18:31 ` Cyrill Gorcunov
2012-01-11 19:29 ` KOSAKI Motohiro
2012-01-11 19:36 ` Pavel Emelyanov
2012-01-11 19:50 ` KOSAKI Motohiro
2012-01-11 19:57 ` Pavel Emelyanov
2012-01-11 19:59 ` Cyrill Gorcunov
2012-01-11 20:19 ` Eric W. Biederman
2012-01-11 20:24 ` Pavel Emelyanov
2012-01-11 20:34 ` Cyrill Gorcunov
2012-01-11 20:45 ` Eric W. Biederman
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