On 05/19/2017 09:31 AM, Zi Yan wrote:
>> This description lacks a problem statement. What's the problem?
>>
>> _PAGE_PSE is used to distinguish between a truly non-present
>> (_PAGE_PRESENT=0) PMD, and a PMD which is undergoing a THP
>> split and should be treated as present.
>>
>>
On 05/19/2017 09:31 AM, Zi Yan wrote:
>> This description lacks a problem statement. What's the problem?
>>
>> _PAGE_PSE is used to distinguish between a truly non-present
>> (_PAGE_PRESENT=0) PMD, and a PMD which is undergoing a THP
>> split and should be treated as present.
>>
>>
On 19 May 2017, at 11:55, Dave Hansen wrote:
> On 04/20/2017 01:47 PM, Zi Yan wrote:
>> pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
>> false negative return when it races with thp spilt
>> (during which _PAGE_PRESENT is temporary cleared.) I don't think that
>> dropping
On 19 May 2017, at 11:55, Dave Hansen wrote:
> On 04/20/2017 01:47 PM, Zi Yan wrote:
>> pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
>> false negative return when it races with thp spilt
>> (during which _PAGE_PRESENT is temporary cleared.) I don't think that
>> dropping
On 04/20/2017 01:47 PM, Zi Yan wrote:
> pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
> false negative return when it races with thp spilt
> (during which _PAGE_PRESENT is temporary cleared.) I don't think that
> dropping _PAGE_PSE check in pmd_present() works well because it
On 04/20/2017 01:47 PM, Zi Yan wrote:
> pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
> false negative return when it races with thp spilt
> (during which _PAGE_PRESENT is temporary cleared.) I don't think that
> dropping _PAGE_PSE check in pmd_present() works well because it
On 04/21/2017 02:17 AM, Zi Yan wrote:
> From: Naoya Horiguchi
>
> pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
> false negative return when it races with thp spilt
> (during which _PAGE_PRESENT is temporary cleared.) I don't think that
> dropping
On 04/21/2017 02:17 AM, Zi Yan wrote:
> From: Naoya Horiguchi
>
> pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
> false negative return when it races with thp spilt
> (during which _PAGE_PRESENT is temporary cleared.) I don't think that
> dropping _PAGE_PSE check in
From: Naoya Horiguchi
pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
false negative return when it races with thp spilt
(during which _PAGE_PRESENT is temporary cleared.) I don't think that
dropping _PAGE_PSE check in pmd_present() works well because
From: Naoya Horiguchi
pmd_present() checks _PAGE_PSE along with _PAGE_PRESENT to avoid
false negative return when it races with thp spilt
(during which _PAGE_PRESENT is temporary cleared.) I don't think that
dropping _PAGE_PSE check in pmd_present() works well because it can
hurt optimization of
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