Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-20 Thread Michal Hocko
On Wed 19-07-17 09:39:50, Mike Kravetz wrote: > On 07/13/2017 12:11 PM, Vlastimil Babka wrote: > > [+CC linux-api] > > > > On 07/13/2017 05:58 PM, Mike Kravetz wrote: > >> mremap will create a 'duplicate' mapping if old_size == 0 is > >> specified. Such duplicate mappings make no sense for privat

Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-19 Thread Mike Kravetz
On 07/13/2017 12:11 PM, Vlastimil Babka wrote: > [+CC linux-api] > > On 07/13/2017 05:58 PM, Mike Kravetz wrote: >> mremap will create a 'duplicate' mapping if old_size == 0 is >> specified. Such duplicate mappings make no sense for private >> mappings. If duplication is attempted for a private

Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-16 Thread Michal Hocko
On Fri 14-07-17 10:29:01, Mike Kravetz wrote: > On 07/14/2017 01:26 AM, Michal Hocko wrote: > > On Thu 13-07-17 15:33:47, Mike Kravetz wrote: > >> On 07/13/2017 12:11 PM, Vlastimil Babka wrote: > >>> [+CC linux-api] > >>> > >>> On 07/13/2017 05:58 PM, Mike Kravetz wrote: > mremap will create a

Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-14 Thread Mike Kravetz
On 07/14/2017 01:26 AM, Michal Hocko wrote: > On Thu 13-07-17 15:33:47, Mike Kravetz wrote: >> On 07/13/2017 12:11 PM, Vlastimil Babka wrote: >>> [+CC linux-api] >>> >>> On 07/13/2017 05:58 PM, Mike Kravetz wrote: mremap will create a 'duplicate' mapping if old_size == 0 is specified. Su

Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-14 Thread Michal Hocko
On Thu 13-07-17 15:33:47, Mike Kravetz wrote: > On 07/13/2017 12:11 PM, Vlastimil Babka wrote: > > [+CC linux-api] > > > > On 07/13/2017 05:58 PM, Mike Kravetz wrote: > >> mremap will create a 'duplicate' mapping if old_size == 0 is > >> specified. Such duplicate mappings make no sense for privat

Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-13 Thread Anshuman Khandual
On 07/14/2017 04:03 AM, Mike Kravetz wrote: > On 07/13/2017 12:11 PM, Vlastimil Babka wrote: >> [+CC linux-api] >> >> On 07/13/2017 05:58 PM, Mike Kravetz wrote: >>> mremap will create a 'duplicate' mapping if old_size == 0 is >>> specified. Such duplicate mappings make no sense for private >>> ma

Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-13 Thread Mike Kravetz
On 07/13/2017 12:11 PM, Vlastimil Babka wrote: > [+CC linux-api] > > On 07/13/2017 05:58 PM, Mike Kravetz wrote: >> mremap will create a 'duplicate' mapping if old_size == 0 is >> specified. Such duplicate mappings make no sense for private >> mappings. If duplication is attempted for a private

Re: [PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-13 Thread Vlastimil Babka
[+CC linux-api] On 07/13/2017 05:58 PM, Mike Kravetz wrote: > mremap will create a 'duplicate' mapping if old_size == 0 is > specified. Such duplicate mappings make no sense for private > mappings. If duplication is attempted for a private mapping, > mremap creates a separate private mapping unr

[PATCH] mm/mremap: Fail map duplication attempts for private mappings

2017-07-13 Thread Mike Kravetz
mremap will create a 'duplicate' mapping if old_size == 0 is specified. Such duplicate mappings make no sense for private mappings. If duplication is attempted for a private mapping, mremap creates a separate private mapping unrelated to the original mapping and makes no modifications to the orig