Re: [Xen-devel] [PATCH v10 6/6] x86/ioreq server: Synchronously reset outstanding p2m_ioreq_server entries when an ioreq server unmaps.

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Sun, Apr 2, 2017 at 1:24 PM, Yu Zhang <yu.c.zhang@xxxxxxxxxxxxxxx> wrote:
> After an ioreq server has unmapped, the remaining p2m_ioreq_server
> entries need to be reset back to p2m_ram_rw. This patch does this
> synchronously by iterating the p2m table.
>
> The synchronous resetting is necessary because we need to guarantee
> the p2m table is clean before another ioreq server is mapped. And
> since the sweeping of p2m table could be time consuming, it is done
> with hypercall continuation.
>
> Signed-off-by: Yu Zhang <yu.c.zhang@xxxxxxxxxxxxxxx>

Reviewed-by: George Dunlap <george.dunlap@xxxxxxxxxx>

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