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xen-devel
[Xen-devel] Re: [Revert] Re: [PATCH] mm: sync vmalloc address space page
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To: |
Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> |
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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: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Thu, 01 Sep 2011 13:37:46 -0700 |
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Cc: |
"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "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>, "akpm@xxxxxxxxxxxxxxxxxxxx" <akpm@xxxxxxxxxxxxxxxxxxxx>, "paulmck@xxxxxxxxxxxxxxxxxx" <paulmck@xxxxxxxxxxxxxxxxxx> |
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Thu, 01 Sep 2011 13:38:29 -0700 |
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<20110901161134.GA8979@xxxxxxxxxxxx> |
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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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