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From: Paul Durrant <Paul.Durrant@citrix.com>
To: Bob Liu <bob.liu@oracle.com>, Roger Pau Monne <roger.pau@citrix.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [Xen-devel] [PATCH v3] xen-blkfront: dynamic configuration of per-vbd resources
Date: Wed, 27 Jul 2016 09:29:08 +0000	[thread overview]
Message-ID: <32978d4e198f4359bc7878d8474b3078@AMSPEX02CL03.citrite.net> (raw)
In-Reply-To: <57987AF6.1050105@oracle.com>

> -----Original Message-----
[snip]
> >
> > Also, I'm not sure this is correct, if blkfront sees the "Closing" state on
> > blkback it will try to close the frontend and destroy the block device (see
> > blkfront_closing), and this should be avoided. You should call
> > blkfront_resume as soon as you see the backend move to the Closed or
> Closing
> > states, without calling blkfront_closing.
> >
> 
> I didn't get how this can happen, backend state won't be changed to 'Closing'
> before blkfront_closing() is called.
> So I think current logic is fine.
> 

Backends can go to closing before frontends, when the PV device is being detached.

  Paul 

  reply	other threads:[~2016-07-27  9:29 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-27  3:21 Bob Liu
2016-07-27  8:07 ` Roger Pau Monné
2016-07-27  9:12   ` Bob Liu
2016-07-27  9:29     ` Paul Durrant [this message]
2016-07-27 10:09     ` Roger Pau Monné
2016-07-27 10:59 ` Roger Pau Monné
2016-07-27 11:21   ` Bob Liu
2016-07-27 14:24     ` Roger Pau Monné
2016-07-27 23:05       ` Bob Liu
2016-07-28  7:49         ` Roger Pau Monné
2016-07-28  9:31 ` [Xen-devel] " David Vrabel

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