Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Wed, 14 Apr 2021 10:40:33 -0400
To:     trondmy@kernel.org
Cc:     "J. Bruce Fields" <bfields@redhat.com>,
        Olga Kornievskaia <kolga@netapp.com>, linux-nfs@vger.kernel.org
Subject: Re: [PATCH 2/2] NFSv42: Don't force attribute revalidation of the
 copy offload source
Message-ID: <20210414144033.GC16800@fieldses.org>
References: <20210414143138.15192-1-trondmy@kernel.org>
 <20210414143138.15192-2-trondmy@kernel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20210414143138.15192-2-trondmy@kernel.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
From:   bfields@fieldses.org (J. Bruce Fields)
Precedence: bulk

Thanks!  Testing....

--b.

On Wed, Apr 14, 2021 at 10:31:38AM -0400, trondmy@kernel.org wrote:
> From: Trond Myklebust <trond.myklebust@hammerspace.com>
> 
> When a copy offload is performed, we do not expect the source file to
> change other than perhaps to see the atime be updated.
> 
> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
> ---
>  fs/nfs/nfs42proc.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
> index 3875120ef3ef..a24349512ffe 100644
> --- a/fs/nfs/nfs42proc.c
> +++ b/fs/nfs/nfs42proc.c
> @@ -390,12 +390,7 @@ static ssize_t _nfs42_proc_copy(struct file *src,
>  	}
>  
>  	nfs42_copy_dest_done(dst_inode, pos_dst, res->write_res.count);
> -
> -	spin_lock(&src_inode->i_lock);
> -	nfs_set_cache_invalid(src_inode, NFS_INO_REVAL_PAGECACHE |
> -						 NFS_INO_REVAL_FORCED |
> -						 NFS_INO_INVALID_ATIME);
> -	spin_unlock(&src_inode->i_lock);
> +	nfs_invalidate_atime(src_inode);
>  	status = res->write_res.count;
>  out:
>  	if (args->sync)
> -- 
> 2.30.2