linux-kernel - Re: [PATCH] NFS: return -EAGAIN when skipped commit in nfs_commit_unstable

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Date:	Mon, 13 Jun 2011 15:38:06 -0400
From:	Trond Myklebust <Trond.Myklebust@...app.com>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Christoph Hellwig <hch@...radead.org>, linux-nfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] NFS: return -EAGAIN when skipped commit in
 nfs_commit_unstable_pages()

On Fri, 2011-06-10 at 22:04 +0800, Wu Fengguang wrote: 
> It's confusing to return success while redirtying the inode at the
> same time in ->write_inode(). Return -EAGAIN to indicate that we've
> not finished with this inode.
> 
> Impact: it's a cleanup, not bug fix.
> 
> CC: Christoph Hellwig <hch@...radead.org>
> Signed-off-by: Wu Fengguang <fengguang.wu@...el.com>
> ---
>  fs/nfs/write.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- linux-next.orig/fs/nfs/write.c	2011-06-10 21:52:34.000000000 +0800
> +++ linux-next/fs/nfs/write.c	2011-06-10 21:52:37.000000000 +0800
> @@ -1521,7 +1521,7 @@ static int nfs_commit_unstable_pages(str
>  {
>  	struct nfs_inode *nfsi = NFS_I(inode);
>  	int flags = FLUSH_SYNC;
> -	int ret = 0;
> +	int ret = -EAGAIN;
>  
>  	if (wbc->sync_mode == WB_SYNC_NONE) {
>  		/* Don't commit yet if this is a non-blocking flush and there

Looks good, but since this is a cleanup, I'm queueing it for 3.1 rather
than pushing it in the regression-fixing window.

Cheers
  Trond

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@...app.com
www.netapp.com

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