On Tue 25-09-18 15:04:06, Andrew Morton wrote:
> On Tue, 25 Sep 2018 14:45:19 -0700 (PDT) David Rientjes
> wrote:
>
> > > > It is also used in
> > > > automated testing to ensure that vmas get disabled for thp
> > > > appropriately
> > > > and we used "nh" since that is how PR_SET_THP_DISABLE
On Tue, 25 Sep 2018, Andrew Morton wrote:
> > > > It is also used in
> > > > automated testing to ensure that vmas get disabled for thp
> > > > appropriately
> > > > and we used "nh" since that is how PR_SET_THP_DISABLE previously
> > > > enforced
> > > > this, and those tests now break.
> >
On Tue, 25 Sep 2018 14:45:19 -0700 (PDT) David Rientjes
wrote:
> > > It is also used in
> > > automated testing to ensure that vmas get disabled for thp appropriately
> > > and we used "nh" since that is how PR_SET_THP_DISABLE previously enforced
> > > this, and those tests now break.
> >
>
On Tue, 25 Sep 2018, Michal Hocko wrote:
> > This is used to identify heap mappings that should be able to fault thp
> > but do not, and they normally point to a low-on-memory or fragmentation
> > issue. After commit 1860033237d4, our users of PR_SET_THP_DISABLE no
> > longer show "nh" for the
On Tue 25-09-18 12:52:09, David Rientjes wrote:
> On Mon, 24 Sep 2018, Vlastimil Babka wrote:
>
> > On 9/24/18 10:02 PM, Michal Hocko wrote:
> > > On Mon 24-09-18 21:56:03, Michal Hocko wrote:
> > >> On Mon 24-09-18 12:30:07, David Rientjes wrote:
> > >>> Commit 1860033237d4 ("mm: make PR_SET_THP_
On Mon, 24 Sep 2018, Vlastimil Babka wrote:
> On 9/24/18 10:02 PM, Michal Hocko wrote:
> > On Mon 24-09-18 21:56:03, Michal Hocko wrote:
> >> On Mon 24-09-18 12:30:07, David Rientjes wrote:
> >>> Commit 1860033237d4 ("mm: make PR_SET_THP_DISABLE immediately active")
> >>> introduced a regression i
On Mon 24-09-18 22:43:49, Vlastimil Babka wrote:
> On 9/24/18 10:02 PM, Michal Hocko wrote:
> > On Mon 24-09-18 21:56:03, Michal Hocko wrote:
[...]
> >> That being said, I do not object to the patch, I am just trying to
> >> understand what is the intended usage for the flag that does try to say
>
On 9/24/18 10:02 PM, Michal Hocko wrote:
> On Mon 24-09-18 21:56:03, Michal Hocko wrote:
>> On Mon 24-09-18 12:30:07, David Rientjes wrote:
>>> Commit 1860033237d4 ("mm: make PR_SET_THP_DISABLE immediately active")
>>> introduced a regression in that userspace cannot always determine the set
>>> of
On Mon 24-09-18 21:56:03, Michal Hocko wrote:
> On Mon 24-09-18 12:30:07, David Rientjes wrote:
> > Commit 1860033237d4 ("mm: make PR_SET_THP_DISABLE immediately active")
> > introduced a regression in that userspace cannot always determine the set
> > of vmas where thp is ineligible.
> >
> > User
On Mon 24-09-18 12:30:07, David Rientjes wrote:
> Commit 1860033237d4 ("mm: make PR_SET_THP_DISABLE immediately active")
> introduced a regression in that userspace cannot always determine the set
> of vmas where thp is ineligible.
>
> Userspace relies on the "nh" flag being emitted as part of /pr
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