From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?utf-8?B?SsO2cm4=?= Engel Subject: Re: [PATCHv2 0/7] Limit overall SCSI EH runtime Date: Tue, 2 Jul 2013 11:50:58 -0400 Message-ID: <20130702155058.GB19005@logfs.org> References: <1372661455-122384-1-git-send-email-hare@suse.de> <20130701174423.GA10645@logfs.org> <1372706605.2385.37.camel@dabdike> <20130701205546.GB10645@logfs.org> <1372747024.2385.71.camel@dabdike> <20130702145809.GA19005@logfs.org> <1372782820.2821.18.camel@dabdike> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from longford.logfs.org ([213.229.74.203]:59718 "EHLO longford.logfs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753487Ab3GBRVh (ORCPT ); Tue, 2 Jul 2013 13:21:37 -0400 Content-Disposition: inline In-Reply-To: <1372782820.2821.18.camel@dabdike> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: Hannes Reinecke , "linux-scsi@vger.kernel.org" , Ewan Milne , Ren Mingxin , Bart van Assche On Tue, 2 July 2013 16:33:40 +0000, James Bottomley wrote: > On Tue, 2013-07-02 at 10:58 -0400, J=C3=B6rn Engel wrote: > > On Tue, 2 July 2013 06:37:05 +0000, James Bottomley wrote: > > >=20 > > > I don't understand what you're getting at. In a dual HBA situati= on, > > > whether the second HBA is implicated or not depends on configurat= ion and > > > what the first HBA is doing. If it's just passively lost device s= tate, > > > then the second HBA should continue just fine. If the insane HBA= is > >=20 > > If the problem is an insane drive instead of an insane HBA, both HB= As > > will be in roughly the same state at roughly the same time - assumi= ng > > they both send commands to the insane drive. If they now go into > > error handling and effectively shut off all the sane drives at roug= hly > > the same time, the user is ****ed. >=20 > That's handled in device reset, so I don't understand your point. Doesn't a device reset require all IO to the entire HBA to stop? Hannes patches fixed that for aborts, but not for device reset yet, afaics. J=C3=B6rn -- In America you can have either a flimsy box banged together out of two by fours and drywall, or a McMansion -- a flimsy box banged together out of two by fours and drywall, but larger, more dramatic-looking, and full of expensive fittings. -- Paul Graham -- 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