Re: [PATCH] mm/migrate: properly preserve write attribute in special migrate entry

2018-04-03 Thread Andrew Morton
On Tue, 3 Apr 2018 19:03:36 -0400 Jerome Glisse wrote: > > That sounds a bit serious. Was a -stable backport considered? > > Like discuss previously with Michal, for lack of upstream user yet > (and PowerPC users of this code are not upstream either yet AFAIK). > > Once i get HMM inside nouvea

Re: [PATCH] mm/migrate: properly preserve write attribute in special migrate entry

2018-04-03 Thread Jerome Glisse
On Tue, Apr 03, 2018 at 03:30:46PM -0700, Andrew Morton wrote: > On Sun, 1 Apr 2018 22:35:06 -0400 jgli...@redhat.com wrote: > > > From: Ralph Campbell > > > > Use of pte_write(pte) is only valid for present pte, the common code > > which set the migration entry can be reach for both valid pres

Re: [PATCH] mm/migrate: properly preserve write attribute in special migrate entry

2018-04-03 Thread Andrew Morton
On Sun, 1 Apr 2018 22:35:06 -0400 jgli...@redhat.com wrote: > From: Ralph Campbell > > Use of pte_write(pte) is only valid for present pte, the common code > which set the migration entry can be reach for both valid present > pte and special swap entry (for device memory). Fix the code to use >