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Re: [Xen-devel] Regression: x86/mm: new _PTE_SWP_SOFT_DIRTY bit conflicts with existing use
- To: Jan Beulich <JBeulich@xxxxxxxx>, Cyrill Gorcunov <gorcunov@xxxxxxxxx>
- From: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
- Date: Thu, 22 Aug 2013 16:18:21 +0400
- Cc: "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Xen-devel@xxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, David Vrabel <david.vrabel@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 23 Aug 2013 14:39:02 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On 08/22/2013 03:33 PM, Jan Beulich wrote:
>> From: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
>> Subject: [PATCH] mm: Make sure _PAGE_SWP_SOFT_DIRTY bit is not set on
>> present pte
>>
>> _PAGE_SOFT_DIRTY bit should never be set on present pte so add
>> VM_BUG_ON to catch any potential future abuse.
>>
>> Also add a comment on _PAGE_SWP_SOFT_DIRTY definition explaining
>> scope of its usage.
>>
>> Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
>
> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
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