linux-kernel - Re: [V9fs-developer] [PATCH 3/5] 9p: revert tsyncfs related changes

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Date:	Tue, 29 Mar 2011 11:05:08 -0500
From:	Eric Van Hensbergen <ericvh@...il.com>
To:	Venkateswararao Jujjuri <jvrao@...ux.vnet.ibm.com>
Cc:	"Aneesh Kumar K. V" <aneesh.kumar@...ux.vnet.ibm.com>,
	linux-fsdevel@...r.kernel.org,
	v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [V9fs-developer] [PATCH 3/5] 9p: revert tsyncfs related changes

On Sun, Mar 27, 2011 at 5:24 PM, Venkateswararao Jujjuri
<jvrao@...ux.vnet.ibm.com> wrote:
>
> Nice explanation. I looked at NFS and realized that they also follow
> write_inode approach.
> So I think you should make it explict that this will be helpful to dotl
> also and may and TFSYNCFS
> in the future if needed. With that I ack this.
>

If this is something we really think we'll be adding back in the
future, is there someway we can conditionalize its use (default off
perhaps) so that if a particular server wanted to take advantage of
it, they could.  This would seem preferable to just backing out the
whole patch.

Another aspect which I didn't consider when we added it is what it
would do to older versions of the servers which didn't have TFSYNCFS
-- maybe this is a good case study for the .L graceful degredation
plan we had talked about in the past where you try a tfsyncfs and if
the server returns an error that it doesn't implement it you back off
to another solution.

Thoughts?  Sorry if I'm being dense -- still adjusting to new sleep
schedule with new baby and spent 16 hours yesterday cranking out two
publication submissions, so folks will have to bear with me for a bit.

        -eric
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