From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: Re: [LSF/MM TOPIC] [ATTEND] scsi_eh updates Date: Tue, 21 Jan 2014 07:52:50 +0100 Message-ID: <52DE1942.3090908@suse.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from cantor2.suse.de ([195.135.220.15]:37585 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750934AbaAUGwv (ORCPT ); Tue, 21 Jan 2014 01:52:51 -0500 In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Giridhar Malavali , "lsf-pc@lists.linux-foundation.org" Cc: linux-scsi On 01/20/2014 07:44 PM, Giridhar Malavali wrote: >=20 >=20 > On 12/20/13 6:54 AM, "Hannes Reinecke" wrote: >=20 [ .. ] >> >> As discussed during last year's LSF the SCSI error handler should be >> updated to handle modern SCSI transports better. >> While some patchsets are already merged, there are some issues which >> are still open: >> - Handling of requests during host reset: >> Do we need to keep hold of outstanding requests during host reset? >> Or is it save to return them prior to host reset? >> - Check for transport status prior to sending TMFs. >> Task management functions typically need a working I_T nexus, >> so it does make sense to first check the transport status >> prior to attempting any TMFs >> - Further steps for updating SCSI EH >> As these are tricky issues which have possible repercussions on the >> entire subsystem and LLDDs it'd be good to have a broader discussion >> here. >=20 > +1 >=20 > I would like to participate in this discussion to provide inputs from > LLDDs. >=20 And I would _very_ much like to have participation from LLDD vendors/providers; as part of the scsi_eh update I plan to introduce a new callback 'eh_transport_reset'. Which need to be implemented at the LLDD level. Cheers, Hannes --=20 Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 N=FCrnberg GF: J. Hawn, J. Guild, F. Imend=F6rffer, HRB 16746 (AG N=FCrnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html