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Re: [Xen-devel] [PATCH] grant-table: don't set m2p override if kmap_ops is not set

To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
From: David Vrabel <david.vrabel@xxxxxxxxxx>
Date: Tue, 5 Nov 2013 12:36:28 +0000
Cc: linux-kernel@xxxxxxxxxxxxxxx, Matt Wilson <msw@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxx
Delivery-date: Tue, 05 Nov 2013 12:36:50 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 05/11/13 11:24, Roger Pau Monne wrote:
> IMHO there's no reason to set a m2p override if the mapping is done in
> kernel space, so only set the m2p override when kmap_ops is set.

Can you provide a more detailed reasoning about why this is safe?

Did you consider other ways of improving scalability?  e.g., a
per-bucket read-write lock.

David

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