From: Olaf Hering <olaf@aepfle.de>
To: Juergen Gross <jgross@suse.com>
Cc: Keir Fraser <keir@xen.org>,
Ian Campbell <ian.campbell@citrix.com>, Tim Deegan <tim@xen.org>,
Ian Jackson <ian.jackson@eu.citrix.com>,
xen-devel@lists.xen.org, Jan Beulich <jbeulich@suse.com>
Subject: Re: [PATCH 3/4] docs: add pvscsi.txt
Date: Mon, 2 Mar 2015 16:14:16 +0100 [thread overview]
Message-ID: <20150302151416.GB20719@aepfle.de> (raw)
In-Reply-To: <54F443A3.9070806@suse.com>
On Mon, Mar 02, Juergen Gross wrote:
> On 03/02/2015 11:16 AM, Olaf Hering wrote:
> >+How to do live migration?
> >+ - pdev will likely be evaluated again on the target host if it came from
> >+ domU.cfg. But what about pdev from 'xl scsi-attach pdev vdev'? Its required
> >+ to adjust h:c:t:l on the target host.
> Use WWN notation? :-)
>
> This was one of the reason the backend should support it.
How does it handle WWN internally, given that
scsiback_add_translation_entry does not seem to understand it?
> >+Implement checks for duplicate pdev assignments?
> >+ - Not sure if SCSI devices can be shared. Will the state be consistent during
> >+ concurrent access? Should the host admin assume cooperative access from
> >+ multiple domUs?
> SCSI does support device sharing. That's the reason for the existence of
> SCSI commands like "reserve" and "release".
In this case the code which checks pdev usage in
libxl_device_vscsi_get_host can just be removed.
Olaf
next prev parent reply other threads:[~2015-03-02 15:14 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-02 10:15 [PATCH 0/4] libbxl: add support for pvscsi, iteration 2 Olaf Hering
2015-03-02 10:15 ` [PATCH 1/4] vscsiif.h: remove reference to WWN Olaf Hering
2015-03-02 10:46 ` Jan Beulich
2015-03-02 10:50 ` Andrew Cooper
2015-03-02 10:55 ` Jürgen Groß
2015-03-02 11:00 ` Andrew Cooper
2015-03-02 10:59 ` Jan Beulich
2015-03-02 10:59 ` Juergen Gross
2015-03-02 14:34 ` Olaf Hering
2015-03-02 14:40 ` Olaf Hering
2015-03-02 14:55 ` Juergen Gross
2015-03-02 10:16 ` [PATCH 2/4] docs: add vscsi to xenstore-paths.markdown Olaf Hering
2015-03-02 10:16 ` [PATCH 3/4] docs: add pvscsi.txt Olaf Hering
2015-03-02 10:49 ` Jan Beulich
2015-03-02 11:04 ` Juergen Gross
2015-03-02 15:14 ` Olaf Hering [this message]
2015-03-02 15:35 ` Juergen Gross
2015-03-02 18:24 ` Olaf Hering
2015-03-02 10:16 ` [PATCH 4/4] libxl: add support for vscsi Olaf Hering
2015-03-02 14:20 ` Olaf Hering
2015-03-02 14:31 ` Ian Campbell
2015-03-02 15:11 ` Olaf Hering
2015-03-02 14:27 ` Olaf Hering
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