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Date: Fri, 19 Nov 2010 18:00:22 +0200
Message-ID: <AANLkTikRHuaCpaROtty6X_Oe6JixzgcbVsxHxvtsu+UV@mail.gmail.com>
Subject: Re: [Ksummit-2010-discuss] checkpoint-restart: naked patch
From: Alexey Dobriyan <adobriyan@gmail.com>
To: Tejun Heo <tj@kernel.org>
Cc: Kirill Korotaev <dev@parallels.com>,
        Serge Hallyn <serge.hallyn@canonical.com>,
        Kapil Arya <kapil@ccs.neu.edu>, Gene Cooperman <gene@ccs.neu.edu>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Pavel Emelianov <xemul@parallels.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Linux Containers <containers@lists.osdl.org>
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On Fri, Nov 19, 2010 at 5:33 PM, Tejun Heo <tj@kernel.org> wrote:
>> - insert SKB's into socket buffers
>
> Can't we drain kernel buffers? ?ie. Stop further writing and wait the
> send-q to drop to zero.

On send:
if network dies right after freeze, you lose.

On receive:
packets arrive after process freeze, but before network device freeze.

>> - setting different statistics counters (like netdev stats etc.)
>> and so on...
>
> Why would this matter?

Because you'll introduce million stupid interfaces not interesting to
anyone but C/R.
--
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