From: Olaf Hering <olaf@aepfle.de>
To: George Dunlap <george.dunlap@citrix.com>
Cc: Anthony Perard <anthony.perard@citrix.com>,
Wei Liu <Wei.Liu2@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: 4.7 qemu regression: HVM guests fail to boot from xvda
Date: Fri, 3 Jun 2016 13:20:29 +0200 [thread overview]
Message-ID: <20160603112029.GA29322@aepfle.de> (raw)
In-Reply-To: <57515833.1050003@citrix.com>
On Fri, Jun 03, George Dunlap wrote:
> On 01/06/16 16:36, Ian Jackson wrote:
> > I think we should fix this with a syntax for explicitly specifying a
> > pv-only device with the hd* pv block number.
> Would this be a suitable solution for you, and do you think you
> understand the suggestion well enough / have enough time to write up a
> patch?
In another mail in this thread it was said that there are two things:
one is the controller type (piix,ahci) and another is the disk type
(connected to emulated hardware, pv-only). The controller type can be
adjusted with 'hdtype=(ide|ahci)'.
I think the regression is: 'vdev=xvda' does not result in a disk
connected to the emulated controller. Should we change the way hdtype=
is handled internally? If hdtype= is not given it remains unset and with
vdev=xvd* no disk-on-emulated-controller gets added. If hdtype= is set
then vdev=xvd* will result in an disk-on-emulated-controller, which
fixes the regression. If vdev=hd* and hdtype= was not set, hdtype will
be silently set to ide.
Would that approach be acceptable? As an alternative adding hdtype=pv
and checking for it in the place changed by c0c099d would be an
alternative way for a pvonly disk.
And I think we are talking only about {hd,xvd}[a-d] anyway, right? Or
would the emulated AHCI controller allow more than 4 disks?
Olaf
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next prev parent reply other threads:[~2016-06-03 11:20 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-30 20:42 4.7 qemu regression: HVM guests fail to boot from xvda Olaf Hering
2016-05-31 11:02 ` George Dunlap
2016-05-31 11:16 ` Olaf Hering
2016-05-31 11:32 ` George Dunlap
2016-05-31 11:41 ` Olaf Hering
2016-05-31 12:00 ` George Dunlap
2016-05-31 12:04 ` Olaf Hering
2016-06-01 13:17 ` Olaf Hering
2016-06-01 21:40 ` Olaf Hering
2016-06-02 11:49 ` Wei Liu
2016-06-02 12:06 ` Olaf Hering
2016-05-31 12:15 ` Jan Beulich
2016-06-01 9:48 ` Wei Liu
2016-06-01 13:34 ` Olaf Hering
2016-06-01 14:11 ` Wei Liu
2016-06-01 14:32 ` Olaf Hering
2016-06-01 15:36 ` Ian Jackson
2016-06-03 10:13 ` George Dunlap
2016-06-03 11:20 ` Olaf Hering [this message]
2016-06-03 11:27 ` George Dunlap
2016-06-03 11:45 ` Ian Jackson
2016-06-06 10:39 ` George Dunlap
2016-06-06 10:52 ` Ian Jackson
2016-06-06 11:43 ` George Dunlap
2016-06-06 12:49 ` George Dunlap
2016-06-07 14:08 ` George Dunlap
2016-06-07 14:27 ` Olaf Hering
2016-06-08 10:17 ` Ian Jackson
2016-06-07 19:06 ` Olaf Hering
2016-06-08 10:18 ` Ian Jackson
2016-06-08 10:23 ` George Dunlap
2016-06-08 10:30 ` Ian Jackson
2016-06-08 10:49 ` George Dunlap
2016-06-08 11:13 ` Olaf Hering
2016-06-08 15:56 ` Konrad Rzeszutek Wilk
2016-06-03 11:50 ` Olaf Hering
2016-05-31 12:10 ` Jan Beulich
2016-05-31 13:41 ` George Dunlap
2016-05-31 14:10 ` Jan Beulich
2016-05-31 16:15 ` Konrad Rzeszutek Wilk
2016-06-08 11:38 ` Wei Liu
2016-06-08 12:04 ` Olaf Hering
2016-06-08 12:09 ` Wei Liu
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