Re: [PATCH 07/11] unpaged: COW on VM_UNPAGED

From: Hugh Dickins
Date: Fri Nov 18 2005 - 03:14:55 EST

On Fri, 18 Nov 2005, David S. Miller wrote:
> From: Hugh Dickins <hugh@xxxxxxxxxxx>
> Date: Fri, 18 Nov 2005 08:02:02 +0000 (GMT)
> > That code is necessary to reproduce the existing behaviour, which has
> > always done COW on PageReserved mappings without complaint - if the
> > vm_page_prot didn't already let you slip through without a WP fault.
> And there is evidence today that this is really needed, at least
> by vbetool.
> Ok, we need COW on VM_UNPAGED. :)

Are you so sure of that, that we should even skip adding a warning?

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