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xen-devel
[Xen-devel] Re: [Revert] Re: [PATCH] mm: sync vmalloc address space page
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To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Subject: |
[Xen-devel] Re: [Revert] Re: [PATCH] mm: sync vmalloc address space page tables in alloc_vm_area() |
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From: |
Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> |
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Date: |
Thu, 1 Sep 2011 14:17:54 -0700 |
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Cc: |
"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, "namhyung@xxxxxxxxx" <namhyung@xxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, David Vrabel <david.vrabel@xxxxxxxxxx>, "rientjes@xxxxxxxxxx" <rientjes@xxxxxxxxxx>, "paulmck@xxxxxxxxxxxxxxxxxx" <paulmck@xxxxxxxxxxxxxxxxxx> |
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Delivery-date: |
Thu, 01 Sep 2011 14:19:28 -0700 |
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www-data@xxxxxxxxxxxxxxxxxxx |
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<4E5FED1A.1000300@xxxxxxxx> |
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References: |
<1314877863-21977-1-git-send-email-david.vrabel@xxxxxxxxxx> <20110901161134.GA8979@xxxxxxxxxxxx> <4E5FED1A.1000300@xxxxxxxx> |
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Sender: |
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On Thu, 01 Sep 2011 13:37:46 -0700
Jeremy Fitzhardinge <jeremy@xxxxxxxx> 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@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).
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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