From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ren Mingxin Subject: Re: [PATCHv2 0/7] Limit overall SCSI EH runtime Date: Fri, 26 Jul 2013 17:52:06 +0800 Message-ID: <51F246C6.4090003@cn.fujitsu.com> References: <1372661455-122384-1-git-send-email-hare@suse.de> <1373488528.7420.55.camel@localhost.localdomain> <51DF9A25.5030502@cn.fujitsu.com> <1373635840.7420.139.camel@localhost.localdomain> <51E3CFF5.2070501@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from cn.fujitsu.com ([222.73.24.84]:49492 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752425Ab3GZJry (ORCPT ); Fri, 26 Jul 2013 05:47:54 -0400 In-Reply-To: <51E3CFF5.2070501@cn.fujitsu.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Hannes Reinecke Cc: emilne@redhat.com, bmr@redhat.com, James Bottomley , linux-scsi@vger.kernel.org, Bart van Assche , Joern Engel Hi, Hannes: On 07/15/2013 06:33 PM, Ren Mingxin wrote: > I noticed that the dd time had been reduced from 6m+ to 2m+ when the > 'eh_deadline' was set as 30s, but the dd time was 6m+(nearly the same > as default - 'eh_deadline' was 0) when the 'eh_deadline' was set as > 10s. I havn't been able to dig further, but I guess there is some > restriction when setting this 'eh_deadline' interface. Maybe should > not less than some timeout, otherwise 'eh_deadline' setting will not > work? I've retried and confirmed that the exception above is caused by misoperation - for I had two fc hosts to build a failover multipath, but I just set 'eh_deadline' on one host. When I tested with 10s, the 'eh_deadline' on the host of the active path wasn't set :-( Sorry for my mistake. So: Tested-by: Ren Mingxin Thanks, Ren