Re: Re: Re: Re: PG_reserved and compound pages

2016-04-19 Thread Frank Mehnert
Hi Michal, On Thursday 07 April 2016 17:22:35 Michal Hocko wrote: > On Thu 07-04-16 15:45:02, Frank Mehnert wrote: > > On Wednesday 06 April 2016 17:33:43 Michal Hocko wrote: > [...] > > > > Do you map your pages to the userspace? If yes then vma with VM_IO or > > > VM_PFNMAP should keep any atte

Re: Re: Re: PG_reserved and compound pages

2016-04-07 Thread Michal Hocko
On Thu 07-04-16 15:45:02, Frank Mehnert wrote: > On Wednesday 06 April 2016 17:33:43 Michal Hocko wrote: [...] > > Do you map your pages to the userspace? If yes then vma with VM_IO or > > VM_PFNMAP should keep any attempt away from those pages. > > Yes, such memory objects are also mapped to user

Re: Re: Re: PG_reserved and compound pages

2016-04-07 Thread Frank Mehnert
On Wednesday 06 April 2016 17:33:43 Michal Hocko wrote: > On Wed 06-04-16 17:12:43, Frank Mehnert wrote: > > Hi Michal, > > > > On Wednesday 06 April 2016 17:02:06 Michal Hocko wrote: > > > [CCing linux-mm mailing list] > > > > > > On Wed 06-04-16 13:28:37, Frank Mehnert wrote: > > > > Hi, > > >

Re: Re: PG_reserved and compound pages

2016-04-06 Thread Michal Hocko
On Wed 06-04-16 17:12:43, Frank Mehnert wrote: > Hi Michal, > > On Wednesday 06 April 2016 17:02:06 Michal Hocko wrote: > > [CCing linux-mm mailing list] > > > > On Wed 06-04-16 13:28:37, Frank Mehnert wrote: > > > Hi, > > > > > > Linux 4.5 introduced additional checks to ensure that compound pa

Re: Re: PG_reserved and compound pages

2016-04-06 Thread Frank Mehnert
Hi Michal, On Wednesday 06 April 2016 17:02:06 Michal Hocko wrote: > [CCing linux-mm mailing list] > > On Wed 06-04-16 13:28:37, Frank Mehnert wrote: > > Hi, > > > > Linux 4.5 introduced additional checks to ensure that compound pages are > > never marked as reserved. In our code we use PG_reser