[Xen-devel] Re: [Revert] Re: [PATCH] mm: sync vmalloc address space page tables in alloc_vm_area()

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

On 09/01/2011 09:11 AM, Konrad Rzeszutek Wilk wrote:
> On Thu, Sep 01, 2011 at 12:51:03PM +0100, David Vrabel wrote:
>> From: David Vrabel <david.vrabel@xxxxxxxxxx>
> Andrew,
>
> I was wondering if you would be Ok with this patch for 3.1.
>
> It is a revert (I can prepare a proper revert if you would like
> that instead of this patch).
>
> The users of this particular function (alloc_vm_area) are just
> Xen. There are no others.

I'd prefer to put explicit vmalloc_sync_all()s in the callsites where
necessary, and ultimately try to work out ways of avoiding it altogether
(like have some hypercall wrapper which touches the arg memory to make
sure its mapped?).

    J

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