Andrea Arcangeli writes:
> Hello,
>
> On Sun, Nov 05, 2017 at 11:01:05AM +0800, huang ying wrote:
>> On Fri, Nov 3, 2017 at 11:00 PM, Zi Yan wrote:
>> > On 3 Nov 2017, at 3:52, Huang, Ying wrote:
>> >
>> >> From: Huang Ying
>> >>
>> >> If THP migration is enabled, the following situation is pos
On 6 Nov 2017, at 15:35, Andrea Arcangeli wrote:
> On Mon, Nov 06, 2017 at 10:53:48AM -0500, Zi Yan wrote:
>> Thanks for clarifying it. We both agree that !pmd_present(), which means
>> PMD migration entry, does not get into userfaultfd_must_wait(),
>> then there seems to be no issue with current
On Mon, Nov 06, 2017 at 10:53:48AM -0500, Zi Yan wrote:
> Thanks for clarifying it. We both agree that !pmd_present(), which means
> PMD migration entry, does not get into userfaultfd_must_wait(),
> then there seems to be no issue with current code yet.
>
> However, the if (!pmd_present(_pmd)) in
Hello,
On Sun, Nov 05, 2017 at 11:01:05AM +0800, huang ying wrote:
> On Fri, Nov 3, 2017 at 11:00 PM, Zi Yan wrote:
> > On 3 Nov 2017, at 3:52, Huang, Ying wrote:
> >
> >> From: Huang Ying
> >>
> >> If THP migration is enabled, the following situation is possible,
> >>
> >> - A THP is mapped at
On 4 Nov 2017, at 23:01, huang ying wrote:
On Fri, Nov 3, 2017 at 11:00 PM, Zi Yan wrote:
On 3 Nov 2017, at 3:52, Huang, Ying wrote:
From: Huang Ying
If THP migration is enabled, the following situation is possible,
- A THP is mapped at source address
- Migration is started to move the TH
On Fri, Nov 3, 2017 at 11:00 PM, Zi Yan wrote:
> On 3 Nov 2017, at 3:52, Huang, Ying wrote:
>
>> From: Huang Ying
>>
>> If THP migration is enabled, the following situation is possible,
>>
>> - A THP is mapped at source address
>> - Migration is started to move the THP to another node
>> - Page f
On 3 Nov 2017, at 3:52, Huang, Ying wrote:
> From: Huang Ying
>
> If THP migration is enabled, the following situation is possible,
>
> - A THP is mapped at source address
> - Migration is started to move the THP to another node
> - Page fault occurs
> - The PMD (migration entry) is copied to the
From: Huang Ying
If THP migration is enabled, the following situation is possible,
- A THP is mapped at source address
- Migration is started to move the THP to another node
- Page fault occurs
- The PMD (migration entry) is copied to the destination address in mremap
That is, it is possible fo
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