> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: 27 November 2018 15:50
> To: Paul Durrant
> Cc: Brian Woods ; Suravee Suthikulpanit
> ; xen-devel de...@lists.xenproject.org>
> Subject: RE: [Xen-devel] [PATCH] amd-iommu: remove page
ect.org>
>> Subject: Re: [Xen-devel] [PATCH] amd-iommu: remove page merging code
>>
>> >>> On 26.11.18 at 18:30, wrote:
>> > The page merging logic makes use of bits 1-8 and bit 63 of a PTE, which
>> used
>> > to be specified as ignored. However,
ect.org>
>> Subject: Re: [Xen-devel] [PATCH] amd-iommu: remove page merging code
>>
>> >>> On 26.11.18 at 18:30, wrote:
>> > The page merging logic makes use of bits 1-8 and bit 63 of a PTE, which
>> used
>> > to be specified as ignored. However,
>>> On 27.11.18 at 15:19, wrote:
> On 27/11/2018 13:06, Jan Beulich wrote:
> On 26.11.18 at 18:30, wrote:
>>> The page merging logic makes use of bits 1-8 and bit 63 of a PTE, which used
>>> to be specified as ignored. However, bits 5 and 6 are now specified as
>>> 'accessed' and 'dirty' bits
> -Original Message-
> From: Andrew Cooper
> Sent: 27 November 2018 14:19
> To: Jan Beulich ; Paul Durrant
>
> Cc: xen-devel ; Brian Woods
> ; Suravee Suthikulpanit
>
> Subject: Re: [Xen-devel] [PATCH] amd-iommu: remove page merging code
>
> On 27
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: 27 November 2018 13:07
> To: Paul Durrant
> Cc: Brian Woods ; Suravee Suthikulpanit
> ; xen-devel de...@lists.xenproject.org>
> Subject: Re: [Xen-devel] [PATCH] amd-iommu: remove page
On 27/11/2018 13:06, Jan Beulich wrote:
On 26.11.18 at 18:30, wrote:
>> The page merging logic makes use of bits 1-8 and bit 63 of a PTE, which used
>> to be specified as ignored. However, bits 5 and 6 are now specified as
>> 'accessed' and 'dirty' bits and their use only remains safe as long
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: 27 November 2018 13:02
> To: Paul Durrant
> Cc: Brian Woods ; Suravee Suthikulpanit
> ; xen-devel de...@lists.xenproject.org>
> Subject: Re: [Xen-devel] [PATCH] amd-iommu: remove page
>>> On 26.11.18 at 18:30, wrote:
> The page merging logic makes use of bits 1-8 and bit 63 of a PTE, which used
> to be specified as ignored. However, bits 5 and 6 are now specified as
> 'accessed' and 'dirty' bits and their use only remains safe as long as
> the DTE 'Host Access Dirty' bits remai
>>> On 26.11.18 at 18:30, wrote:
> The page merging logic makes use of bits 1-8 and bit 63 of a PTE, which used
> to be specified as ignored. However, bits 5 and 6 are now specified as
> 'accessed' and 'dirty' bits and their use only remains safe as long as
> the DTE 'Host Access Dirty' bits remai
The page merging logic makes use of bits 1-8 and bit 63 of a PTE, which used
to be specified as ignored. However, bits 5 and 6 are now specified as
'accessed' and 'dirty' bits and their use only remains safe as long as
the DTE 'Host Access Dirty' bits remain clear. The code is also of dubious
benef
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