El 20/05/15 a les 15.10, Bob Liu ha escrit:
> The major responsibility of talk_to_blkback() is allocate and initialize the
> request ring and writes the ring info stuff out.
^ write ^ to xenstore.
> But this work should be done after backend entered 'XenbusStateInitWait' as
> defined in the protocol file.
> See xen/include/public/io/blkif.h in XEN git tree:
> Front Back
> ================================= =====================================
> XenbusStateInitialising XenbusStateInitialising
> o Query virtual device o Query backend device identification
> properties. data.
> o Setup OS device instance. o Open and validate backend device.
> o Publish backend features and
> transport parameters.
> |
> |
> V
> XenbusStateInitWait
>
> o Query backend features and
> transport parameters.
> o Allocate and initialize the
> request ring.
>
> There is no problem with this yet, but it is an violation of the design and
> furthermore it would not allow frontend/backend to negotiate 'multi-page' and
> 'multi-queue' features.
>
> Changes in v2:
> - Re-write the commit message to be more clear.
>
> Signed-off-by: Bob Liu <bob....@oracle.com>
With that fixed:
Acked-by: Roger Pau Monné <roger....@citrix.com>
Roger.
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