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    SubjectRe: [Revert] Re: [PATCH] mm: sync vmalloc address space page tables in alloc_vm_area()
    On Thu, 01 Sep 2011 13:37:46 -0700
    Jeremy Fitzhardinge <jeremy@goop.org> wrote:

    > 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@citrix.com>
    > > 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).

    David's patch looks better than a straight reversion.

    Problem is, I can't find David's original email anywhere. Someone's
    been playing games with To: headers?

    > > 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,

    What would that patch look like? Bear in mind that we'll need something
    suitable for 3.1 and for a 3.0 backport.

    > 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?).



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