On Wed, Apr 7, 2021 at 1:32 AM Mel Gorman wrote:
>
> On Tue, Apr 06, 2021 at 09:42:07AM -0700, Yang Shi wrote:
> > On Tue, Apr 6, 2021 at 5:03 AM Gerald Schaefer
> > wrote:
> > >
> > > On Thu, 1 Apr 2021 13:10:49 -0700
> > > Yang Shi wrote:
> > >
> > > [...]
> > > > > >
> > > > > > Yes, it could
On Tue, Apr 06, 2021 at 09:42:07AM -0700, Yang Shi wrote:
> On Tue, Apr 6, 2021 at 5:03 AM Gerald Schaefer
> wrote:
> >
> > On Thu, 1 Apr 2021 13:10:49 -0700
> > Yang Shi wrote:
> >
> > [...]
> > > > >
> > > > > Yes, it could be. The old behavior of migration was to return -ENOMEM
> > > > > if TH
On Tue, Apr 6, 2021 at 5:03 AM Gerald Schaefer
wrote:
>
> On Thu, 1 Apr 2021 13:10:49 -0700
> Yang Shi wrote:
>
> [...]
> > > >
> > > > Yes, it could be. The old behavior of migration was to return -ENOMEM
> > > > if THP migration is not supported then split THP. That behavior was
> > > > not ver
On Thu, 1 Apr 2021 13:10:49 -0700
Yang Shi wrote:
[...]
> > >
> > > Yes, it could be. The old behavior of migration was to return -ENOMEM
> > > if THP migration is not supported then split THP. That behavior was
> > > not very friendly to some usecases, for example, memory policy and
> > > migrat
On Wed, Mar 31, 2021 at 6:20 AM Mel Gorman wrote:
>
> On Tue, Mar 30, 2021 at 04:42:00PM +0200, Gerald Schaefer wrote:
> > Could there be a work-around by splitting THP pages instead of marking them
> > as migrate pmds (via pte swap entries), at least when THP migration is not
> > supported? I gue
On Wed, Mar 31, 2021 at 4:47 AM Gerald Schaefer
wrote:
>
> On Tue, 30 Mar 2021 09:51:46 -0700
> Yang Shi wrote:
>
> > On Tue, Mar 30, 2021 at 7:42 AM Gerald Schaefer
> > wrote:
> > >
> > > On Mon, 29 Mar 2021 11:33:06 -0700
> > > Yang Shi wrote:
> > >
> > > >
> > > > When the THP NUMA fault sup
On Tue, Mar 30, 2021 at 04:42:00PM +0200, Gerald Schaefer wrote:
> Could there be a work-around by splitting THP pages instead of marking them
> as migrate pmds (via pte swap entries), at least when THP migration is not
> supported? I guess it could also be acceptable if THP pages were simply not
>
On Tue, 30 Mar 2021 09:51:46 -0700
Yang Shi wrote:
> On Tue, Mar 30, 2021 at 7:42 AM Gerald Schaefer
> wrote:
> >
> > On Mon, 29 Mar 2021 11:33:06 -0700
> > Yang Shi wrote:
> >
> > >
> > > When the THP NUMA fault support was added THP migration was not supported
> > > yet.
> > > So the ad ho
On Tue, Mar 30, 2021 at 7:42 AM Gerald Schaefer
wrote:
>
> On Mon, 29 Mar 2021 11:33:06 -0700
> Yang Shi wrote:
>
> >
> > When the THP NUMA fault support was added THP migration was not supported
> > yet.
> > So the ad hoc THP migration was implemented in NUMA fault handling. Since
> > v4.14
>
On Mon, 29 Mar 2021 11:33:06 -0700
Yang Shi wrote:
>
> When the THP NUMA fault support was added THP migration was not supported yet.
> So the ad hoc THP migration was implemented in NUMA fault handling. Since
> v4.14
> THP migration has been supported so it doesn't make too much sense to stil
When the THP NUMA fault support was added THP migration was not supported yet.
So the ad hoc THP migration was implemented in NUMA fault handling. Since v4.14
THP migration has been supported so it doesn't make too much sense to still keep
another THP migration implementation rather than using t
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