linux-kernel - Re: [RFC][PATCH 1/4] checkpoint-restart: general infrastructure

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Message-Id: <200808111725.13635.arnd@arndb.de>
Date:	Mon, 11 Aug 2008 17:25:13 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"Serge E. Hallyn" <serue@...ibm.com>
Cc:	Dave Hansen <dave@...ux.vnet.ibm.com>,
	containers@...ts.linux-foundation.org,
	Theodore Tso <tytso@....edu>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 1/4] checkpoint-restart: general infrastructure

On Monday 11 August 2008, Serge E. Hallyn wrote:
> One reason is that I suspect that stops us from being able to send that
> data straight to a pipe to compress and/or send on the network, without
> hitting local disk.  Though if the checkpointfs was ram-based maybe not?
> 
> As Oren has pointed out before, passing in an fd means we can pass a
> socket into the syscall.
> 
> Using the anon_inodes would also prevent that, but if it makes for a
> cleaner overall solution then I'm not against considering either one
> of course.
> 

With anon_inodes, you can still implement splice_read/splice_write,
so you can splice it into a socket.

	Arnd <><
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