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From: "Jan Beulich" <JBeulich@suse.com>
To: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>,
	Ian Campbell <Ian.Campbell@citrix.com>,
	xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH v5 0/8] qdisk local attach
Date: Thu, 10 May 2012 14:07:44 +0100	[thread overview]
Message-ID: <4FABD9C00200007800082BC5@nat28.tlf.novell.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1205041204540.26786@kaball-desktop>

>>> On 04.05.12 at 13:12, Stefano Stabellini <stefano.stabellini@eu.citrix.com> wrote:
> Hi all,
> this patch implements local_attach support for QDISK: that means that
> you can use qcow2 as disk format for your PV guests disks and use
> pygrub to retrieve the kernel and initrd in dom0.
> 
> The idea is that we start a QEMU instance at boot time to listen to
> local_attach requests. When libxl_device_disk_local_attach is called on
> a QDISK images, libxl sets up a backend/frontend pair in dom0 for the disk
> so that blkfront in dom0 will create a new xvd device for it.
> Then pygrub can be pointed at this device to retrieve kernel and
> initrd.

So I pulled this into my local tree to be able to debug problems in
our gntdev driver in a reasonably isolated way (i.e. not needing
to fire up guests). While block-attach works fine, block-detach
doesn't at all. This may be related to me using the deprecated
file:/ form of specifying the source during attach, as all of the
supposedly modern forms I tried weren't accepted by the parser.

Jan

  parent reply	other threads:[~2012-05-10 13:07 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-04 11:12 [PATCH v5 0/8] qdisk local attach Stefano Stabellini
2012-05-04 11:13 ` [PATCH v5 1/8] libxl: make libxl_device_disk_local_attach/detach internal functions Stefano Stabellini
2012-05-04 11:13 ` [PATCH v5 2/8] libxl: libxl__device_disk_local_attach return a new libxl_device_disk Stefano Stabellini
2012-05-04 14:40   ` Ian Campbell
2012-05-04 16:27   ` Ian Jackson
2012-05-14 13:04     ` Stefano Stabellini
2012-05-14 13:06       ` Ian Campbell
2012-05-14 14:15       ` Ian Jackson
2012-05-04 11:13 ` [PATCH v5 3/8] libxl: add a transaction parameter to libxl__device_generic_add Stefano Stabellini
2012-05-04 14:41   ` Ian Campbell
2012-05-04 11:13 ` [PATCH v5 4/8] libxl: introduce libxl__device_disk_add Stefano Stabellini
2012-04-24 10:45   ` [PATCH v4 0/8] qdisk local attach Stefano Stabellini
2012-04-24 10:45     ` [PATCH v4 1/8] libxl: make libxl_device_disk_local_attach/detach internal functions Stefano Stabellini
2012-04-24 15:16       ` Ian Campbell
2012-04-24 10:45     ` [PATCH v4 2/8] libxl: libxl__device_disk_local_attach return a new libxl_device_disk Stefano Stabellini
2012-04-24 15:02       ` Ian Jackson
2012-04-24 15:25       ` Ian Campbell
2012-04-24 10:45     ` [PATCH v4 3/8] libxl: add a transaction parameter to libxl__device_generic_add Stefano Stabellini
2012-04-24 15:34       ` Ian Jackson
2012-04-24 10:45     ` [PATCH v4 4/8] libxl: introduce libxl__device_disk_add_t Stefano Stabellini
2012-04-24 15:42       ` Ian Jackson
2012-04-24 16:02         ` Ian Jackson
2012-05-04 16:30         ` [PATCH v4 4/8] libxl: introduce libxl__device_disk_add_t [and 1 more messages] Ian Jackson
2012-04-24 10:45     ` [PATCH v4 5/8] xl/libxl: add a blkdev_start parameter Stefano Stabellini
2012-04-24 14:52       ` Ian Jackson
2012-04-24 10:45     ` [PATCH v4 6/8] libxl: introduce libxl__alloc_vdev Stefano Stabellini
2012-04-24 14:58       ` Ian Jackson
2012-04-24 15:04         ` Ian Campbell
2012-04-24 15:16           ` Ian Jackson
2012-04-24 10:45     ` [PATCH v4 7/8] xl/libxl: implement QDISK libxl_device_disk_local_attach Stefano Stabellini
2012-04-24 15:39       ` Ian Jackson
2012-04-24 10:45     ` [PATCH v4 8/8] libxl__device_disk_local_attach: wait for state "connected" Stefano Stabellini
2012-04-24 15:18       ` Ian Jackson
2012-05-04 14:49   ` [PATCH v5 4/8] libxl: introduce libxl__device_disk_add Ian Campbell
2012-05-04 11:13 ` [PATCH v5 5/8] xl/libxl: add a blkdev_start parameter Stefano Stabellini
2012-05-04 14:54   ` Ian Campbell
2012-05-04 16:32   ` Ian Jackson
2012-05-04 11:13 ` [PATCH v5 6/8] libxl: introduce libxl__alloc_vdev Stefano Stabellini
2012-05-04 14:59   ` Ian Campbell
2012-05-04 16:46     ` Ian Jackson
2012-05-04 17:08       ` Ian Campbell
2012-05-04 17:16         ` Ian Jackson
2012-05-04 17:20           ` Ian Campbell
2012-05-14 13:48     ` Stefano Stabellini
2012-05-14 13:56       ` Ian Campbell
2012-05-04 16:39   ` Ian Jackson
2012-05-14 14:10     ` Stefano Stabellini
2012-05-14 14:22       ` Ian Jackson
2012-05-14 14:43         ` Stefano Stabellini
2012-05-04 11:13 ` [PATCH v5 7/8] xl/libxl: implement QDISK libxl_device_disk_local_attach Stefano Stabellini
2012-05-04 15:11   ` Ian Campbell
2012-05-04 16:42   ` Ian Jackson
2012-05-14 14:13     ` Stefano Stabellini
2012-05-14 14:23       ` Ian Jackson
2012-05-14 14:45         ` Stefano Stabellini
2012-05-14 14:46           ` Ian Jackson
2012-05-14 14:52             ` Stefano Stabellini
2012-05-04 11:13 ` [PATCH v5 8/8] libxl__device_disk_local_attach: wait for state "connected" Stefano Stabellini
2012-05-04 15:13   ` Ian Campbell
2012-05-14 14:16     ` Stefano Stabellini
2012-05-10 13:07 ` Jan Beulich [this message]
2012-05-11 15:57   ` [PATCH v5 0/8] qdisk local attach Stefano Stabellini

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