From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH 2/5] remus: don't write xenstore data if it
 fails
Date: Wed, 30 Dec 2015 10:47:22 +0000
Message-ID: <5683B63A.3080601@citrix.com>
References: <1451439588-25310-1-git-send-email-wency@cn.fujitsu.com>
	<1451439588-25310-3-git-send-email-wency@cn.fujitsu.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <1451439588-25310-3-git-send-email-wency@cn.fujitsu.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Wen Congyang <wency@cn.fujitsu.com>, xen devel <xen-devel@lists.xen.org>
Cc: Shriram Rajagopalan <rshriram@cs.ubc.ca>, Changlong Xie <xiecl.fnst@cn.fujitsu.com>, Yang Hongyang <hongyang.yang@easystack.cn>
List-Id: xen-devel@lists.xenproject.org

On 30/12/2015 01:39, Wen Congyang wrote:

If what fails?

Given the content of this patch in the context of the previous one, I 
presume you are wishing to avoid re-sending the emulator state after 
libxl__xc_domain_save_done() completes, but under what circumstances 
will this occur?

> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
> ---
>   tools/libxl/libxl_stream_write.c | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/tools/libxl/libxl_stream_write.c b/tools/libxl/libxl_stream_write.c
> index 80d9208..ee9c53a 100644
> --- a/tools/libxl/libxl_stream_write.c
> +++ b/tools/libxl/libxl_stream_write.c
> @@ -354,8 +354,12 @@ void libxl__xc_domain_save_done(libxl__egc *egc, void *dss_void,
>        * alive, and check_all_finished() may have torn it down around us.
>        * If the stream is not still alive, we must not continue any work.
>        */
> -    if (libxl__stream_write_inuse(stream))
> -        write_emulator_xenstore_record(egc, stream);
> +    if (libxl__stream_write_inuse(stream)) {
> +        if (dss->remus)
> +            stream_complete(egc, stream, 0);
> +        else
> +            write_emulator_xenstore_record(egc, stream);
> +    }
>   }
>   
>   static void write_emulator_xenstore_record(libxl__egc *egc,