linux-kernel - Re: [RFC PATCH] nfs: Support posix_fadvise(POSIX_FADV

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Message-Id: <5AC2C9F0-EEFE-423E-BBB9-27102D1CA163@oracle.com>
Date:	Sat, 23 Jun 2012 09:30:36 -0400
From:	Chuck Lever <chuck.lever@...cle.com>
To:	Jim Rees <rees@...ch.edu>
Cc:	Namjae Jeon <linkinjeon@...il.com>,
	"bfields@...ldses.org" <bfields@...ldses.org>,
	"Trond.Myklebust@...app.com" <Trond.Myklebust@...app.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"bharrosh@...asas.com" <bharrosh@...asas.com>,
	"linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Namjae Jeon <namjae.jeon@...sung.com>,
	VivekTrivedi <t.vivek@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: [RFC PATCH] nfs: Support posix_fadvise(POSIX_FADV_RANDOM) on nfs server.



Sent from my iPad

On Jun 23, 2012, at 7:51 AM, Jim Rees <rees@...ch.edu> wrote:

> Namjae Jeon wrote:
> 
>  From: Namjae Jeon <namjae.jeon@...sung.com>
> 
>  This patch disable readahead for a file on NFS Server when
>  posix_fadvise(fd..., POSIX_FADV_RANDOM) is called on NFS
>  Client.
> 
> It looks like you're adding an argument to the read op.  Wouldn't that be an
> incompatible change?  In which case wouldn't it be better to propose this
> for inclusion in NFS 4.2?  In fact didn't Dean propose this?  What ever
> happened with that?

Yes, posix_fadvise support is part of NFSv4.2.

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