From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jun'ichi Nomura" Subject: Re: multipath_busy() stalls IO due to scsi_host_is_busy() Date: Tue, 22 May 2012 13:31:36 +0900 Message-ID: <4FBB16A8.1020401@ce.jp.nec.com> References: <4FB39D78.9020300@itwm.fraunhofer.de> <4FB4C065.7070804@ce.jp.nec.com> <4FBA6281.3040109@itwm.fraunhofer.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4FBA6281.3040109@itwm.fraunhofer.de> Sender: linux-scsi-owner@vger.kernel.org To: Bernd Schubert , Mike Snitzer Cc: dm-devel@redhat.com, "linux-scsi@vger.kernel.org" List-Id: dm-devel.ids Hi, On 05/22/12 00:42, Bernd Schubert wrote: > On 05/17/2012 11:09 AM, Jun'ichi Nomura wrote: >> However, when it is target/host that is busy, I think dm should >> send the request down and let SCSI, which has better knowledge >> about the shared resource, do appropriate starvation control. >> >> Could you try the attached patch? ... > Thanks, that works fine! I had something else in my mind for multipath, but if this can go into scsi we don't need the multipath patch anymore. > Are you going to officially submit it (missing signed-off)? Thank you for testing. Yes, I'll submit it officially with your Reported-by/Tested-by. Also, a note suggested by Mike Snitzer will be added to the patch description. (Thanks Mike.) -- Jun'ichi Nomura, NEC Corporation