From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yu Zhiguo <yuzg@cn.fujitsu.com>
Subject: why xenstore-* hangs if xenstored is not started
Date: Tue, 22 Jun 2010 15:32:35 +0800
Message-ID: <4C206713.6030508@cn.fujitsu.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
List-Id: xen-devel@lists.xenproject.org

 Running xenstore-* when xenstored is not started, it will hang and
cannot accept any signal, e.g. SIGINT.
 I seems that the process is blocked at accessing '/proc/xen/xenbus'.

 # mount -t xenfs xenfs /proc/xen/
 # xenstore-ls

 call trace:
 do_ls() -> xs_directory() -> xs_talkv() -> xs_write_all() -> write()

 BLOCK is no problem but why process cannot accept signal, Any opinion?


 If start xenstored in other console, xenstore-ls executes and then
receive the signal, seems the signal is pended...

-- 
Regards
Yu Zhiguo