linux-kernel - Re: [RFC][PATCH 3/8] create fs flags to mark c/r supported fs's

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Message-Id: <1235769650.26788.388.camel@nimitz>
Date:	Fri, 27 Feb 2009 13:20:50 -0800
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	containers <containers@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Serge E. Hallyn" <serue@...ibm.com>,
	Oren Laadan <orenl@...columbia.edu>, hch@...radead.org
Subject: Re: [RFC][PATCH 3/8] create fs flags to mark c/r supported fs's

On Sat, 2009-02-28 at 00:16 +0300, Alexey Dobriyan wrote:
> On Fri, Feb 27, 2009 at 12:34:28PM -0800, Dave Hansen wrote:
> > +#define FS_CHECKPOINTABLE 8
> 
> This will ban all sockets, for instance, until all of them are
> C/R-ready. And every new socket type must be made C/R-ready from
> the very beginning, or risk major C/R breakage.

Yes, it is very important to have fine-grained control over what is
checkpointable and not.  We can't simply say "all sockets are OK" all at
once.  I meant this as a high-level things so that I didn't have to go
chase down the several f_ops for each in and every filesystem that is
supported.

Did you look farther down in the patches to see how this can be
overridden with an f_op?

-- Dave

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