From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pavel Machek <pavel@ucw.cz>
Subject: Re: hiberante hangs TCP Re: [EXAMPLE CODE] Parasite
 thread injection and TCP connection hijacking
Date: Fri, 17 Feb 2012 20:28:59 +0100
Message-ID: <20120217192859.GG2707@elf.ucw.cz>
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To: Tejun Heo <tj@kernel.org>
Cc: netdev@vger.kernel.org, linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org, David Fries <david@fries.net>
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On Wed 2011-11-02 08:10:39, Tejun Heo wrote:
> Hello,
> =

> On Wed, Nov 02, 2011 at 06:44:31PM +0900, MyungJoo Ham wrote:
> > > Hmmm... sounds like taking down network interfaces before starting
> > > hibernation sequence should be enough, which shouldn't be too
> > > difficult to implement from userland. =A0Rafael, what do you think?
> > >
> > > Thanks.
> > =

> > Um... it seems that the "thaw" callbacks of network interfaces or TCP
> > should do something on this.
> > =

> > Probably, the "thaw" callbacks should make sure that the TCP
> > connections are closed?
> =

> I don't think it's a good idea to diddle with TCP connections from
> that layer.  From what I understand, it seem all we need is plugging
> tx/rx while preparing for hibernation.  That shouldn't be too
> difficult.

Yes, that should be done. =


If someone has uswsusp setup where they talk over the network, it
might break them, but hopefully noone is doing that.

Also hopefully noone does hibernation on /dev/nbd.

      	    							Pavel
-- =

(english) http://www.livejournal.com/~pavelmachek
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