Re: [Xen-devel] [PATCH 08/12] xen/grant-table: add a mechanism to safely unmap pages that are in use

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2015-01-07 at 13:30 +0000, David Vrabel wrote:
> On 07/01/15 13:24, Ian Campbell wrote:
> > On Wed, 2015-01-07 at 13:07 +0000, David Vrabel wrote:
> > 
> >> We don't use this safe unmap mechanism for netback because the zero copy
> >> stuff means we don't need it and the polling on the unmap is high
> >> latency and only good enough if the polling is needed very rarely.
> > 
> > I'd think it should be rare for netback too unless your network is made
> > of wet string.
> 
> Hmmm.  Yes, this might be worth looking at but I would prefer to do it
> to it as a follow up to this series.

Sure.



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