From owner-freebsd-geom@FreeBSD.ORG Thu Jul 15 14:10:02 2010 Return-Path: Delivered-To: freebsd-geom@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C9A3E1065673 for ; Thu, 15 Jul 2010 14:10:02 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id B54A78FC12 for ; Thu, 15 Jul 2010 14:10:02 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o6FEA2XX040051 for ; Thu, 15 Jul 2010 14:10:02 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o6FEA2J0040049; Thu, 15 Jul 2010 14:10:02 GMT (envelope-from gnats) Date: Thu, 15 Jul 2010 14:10:02 GMT Message-Id: <201007151410.o6FEA2J0040049@freefall.freebsd.org> To: freebsd-geom@FreeBSD.org From: Marcin Wisnicki Cc: Subject: Re: kern/148540: [geom] geom_sched breaks ata devices X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Marcin Wisnicki List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Jul 2010 14:10:02 -0000 The following reply was made to PR kern/148540; it has been noted by GNATS. From: Marcin Wisnicki To: "Andrey V. Elsukov" Cc: bug-followup@freebsd.org, "Anton A. Barsukov" , Luigi Rizzo Subject: Re: kern/148540: [geom] geom_sched breaks ata devices Date: Thu, 15 Jul 2010 16:06:01 +0200 On Wed, Jul 14, 2010 at 16:32, Marcin Wisnicki wrote: > 2010/7/14 Andrey V. Elsukov : >> Hi, >> >> can you test attached patch? >> > > Forwarding ioctls works but I'm thinking that maybe gsched should > insert itself as a sibling to DEV and reattach all non-DEV consumers > (though that would mean you could bypass scheduler by directly opening > device). > Something like this: > http://wisnia21.freeshell.org/f/freebsd/geom_sched-insertion.png > One more thing. Currently gsched messes up names of disk geoms; # geom disk status Name Status Components ad0.sched. N/A N/A ad1 N/A N/A cd0 N/A N/A da0 N/A N/A da1 N/A N/A # sysctl -b kern.geom.conftxt | grep -a DISK 0 DISK da1 4060086272 512 hd 255 sc 63 0 DISK da0 1000204886016 512 hd 255 sc 63 0 DISK cd0 0 2048 hd 0 sc 0 0 DISK ad1 120034123776 512 hd 16 sc 255 0 DISK ad0.sched. 41109061120 512 hd 16 sc 255 Besides not looking good it breaks tools that use this information (like causing sade and sysinstall to segfault). Or maybe it is a bug of geom(8)-status and kern.geom.conftxt ? It seems like they print name of geom provider instead of the name of geom. ghost# geom disk status ad0 Name Status Components ad0.sched. N/A N/A ghost# geom disk status ad0.sched. geom: No such geom: ad0.sched.. ghost# geom disk list ad0.sched. geom: No such geom: ad0.sched.. ghost# geom disk list ad0 Geom name: ad0 Providers: 1. Name: ad0.sched. Mediasize: 41109061120 (38G) Sectorsize: 512 Mode: r7w7e21 fwsectors: 255 fwheads: 16