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RE: [Xen-devel] [PATCH v3] xen-blkfront: dynamic configuration of per-vbd resources

From Paul Durrant <Paul.Durrant@citrix.com>
Newsgroups linux.kernel
Subject RE: [Xen-devel] [PATCH v3] xen-blkfront: dynamic configuration of per-vbd resources
Date 2016-07-27 11:30 +0200
Message-ID <rZtk7-5Wg-37@gated-at.bofh.it> (permalink)
References <rZnHH-2rc-15@gated-at.bofh.it> <rZs4G-5fF-11@gated-at.bofh.it> <rZtap-5SB-9@gated-at.bofh.it>
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> -----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

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Thread

[PATCH v3] xen-blkfront: dynamic configuration of per-vbd resources Bob Liu <bob.liu@oracle.com> - 2016-07-27 05:30 +0200
  Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd  resources Roger Pau Monné <roger.pau@citrix.com> - 2016-07-27 10:10 +0200
    Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd resources Bob Liu <bob.liu@oracle.com> - 2016-07-27 11:20 +0200
      RE: [Xen-devel] [PATCH v3] xen-blkfront: dynamic configuration of  per-vbd resources Paul Durrant <Paul.Durrant@citrix.com> - 2016-07-27 11:30 +0200
      Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd  resources Roger Pau Monné <roger.pau@citrix.com> - 2016-07-27 12:10 +0200
  Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd  resources Roger Pau Monné <roger.pau@citrix.com> - 2016-07-27 13:10 +0200
    Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd resources Bob Liu <bob.liu@oracle.com> - 2016-07-27 13:30 +0200
      Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd  resources Roger Pau Monné <roger.pau@citrix.com> - 2016-07-27 16:30 +0200
        Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd resources Bob Liu <bob.liu@oracle.com> - 2016-07-28 01:10 +0200
          Re: [PATCH v3] xen-blkfront: dynamic configuration of per-vbd  resources Roger Pau Monné <roger.pau@citrix.com> - 2016-07-28 09:50 +0200
  Re: [Xen-devel] [PATCH v3] xen-blkfront: dynamic configuration of  per-vbd resources David Vrabel <david.vrabel@citrix.com> - 2016-07-28 11:40 +0200

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