Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

On Fri 23-02-18 13:40:09, Robert Harris wrote: > If you are asking me to prove whether modifying the tuneable in the > manner above, thereby preferring compaction for more fragmented systems, > is successful then I can't answer now. I assume that the onus would > have been on Mel to show this at

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

> On 23 Feb 2018, at 09:10, Michal Hocko wrote: > > On Mon 19-02-18 14:30:36, Robert Harris wrote: >> >> >>> On 19 Feb 2018, at 12:39, Michal Hocko wrote: >>> >>> On Mon 19-02-18 12:14:26, Robert Harris wrote: > On 19 Feb 2018, at

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

On Mon 19-02-18 14:30:36, Robert Harris wrote: > > > > On 19 Feb 2018, at 12:39, Michal Hocko wrote: > > > > On Mon 19-02-18 12:14:26, Robert Harris wrote: > >> > >> > >>> On 19 Feb 2018, at 08:26, Michal Hocko wrote: > >>> > >>> On Sun 18-02-18

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

> On 19 Feb 2018, at 12:39, Michal Hocko wrote: > > On Mon 19-02-18 12:14:26, Robert Harris wrote: >> >> >>> On 19 Feb 2018, at 08:26, Michal Hocko wrote: >>> >>> On Sun 18-02-18 16:47:55, robert.m.har...@oracle.com wrote: From: "Robert M. Harris"

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

> On 19 Feb 2018, at 13:10, Mel Gorman wrote: > > On Mon, Feb 19, 2018 at 12:26:39PM +, Robert Harris wrote: >> >> >>> On 19 Feb 2018, at 09:47, Mel Gorman wrote: >>> >>> On Sun, Feb 18, 2018 at 04:47:55PM +, robert.m.har...@oracle.com wrote:

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

On Mon, Feb 19, 2018 at 12:26:39PM +, Robert Harris wrote: > > > > On 19 Feb 2018, at 09:47, Mel Gorman wrote: > > > > On Sun, Feb 18, 2018 at 04:47:55PM +, robert.m.har...@oracle.com wrote: > >> From: "Robert M. Harris" > >> > >>

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

On Mon 19-02-18 12:14:26, Robert Harris wrote: > > > > On 19 Feb 2018, at 08:26, Michal Hocko wrote: > > > > On Sun 18-02-18 16:47:55, robert.m.har...@oracle.com wrote: > >> From: "Robert M. Harris" > >> > >> __fragmentation_index() calculates a

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

> On 19 Feb 2018, at 09:47, Mel Gorman wrote: > > On Sun, Feb 18, 2018 at 04:47:55PM +, robert.m.har...@oracle.com wrote: >> From: "Robert M. Harris" >> >> __fragmentation_index() calculates a value used to determine whether >> compaction

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

> On 19 Feb 2018, at 08:26, Michal Hocko wrote: > > On Sun 18-02-18 16:47:55, robert.m.har...@oracle.com wrote: >> From: "Robert M. Harris" >> >> __fragmentation_index() calculates a value used to determine whether >> compaction should be

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

On Sun, Feb 18, 2018 at 04:47:55PM +, robert.m.har...@oracle.com wrote: > From: "Robert M. Harris" > > __fragmentation_index() calculates a value used to determine whether > compaction should be favoured over page reclaim in the event of allocation > failure. The

Re: [PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

On Sun 18-02-18 16:47:55, robert.m.har...@oracle.com wrote: > From: "Robert M. Harris" > > __fragmentation_index() calculates a value used to determine whether > compaction should be favoured over page reclaim in the event of allocation > failure. The calculation

[PATCH 1/1] mm, compaction: correct the bounds of __fragmentation_index()

From: "Robert M. Harris" __fragmentation_index() calculates a value used to determine whether compaction should be favoured over page reclaim in the event of allocation failure. The calculation itself is opaque and, on inspection, does not match its existing