Re: [PATCH 09/14] mm, compaction: Ignore the fragmentation avoidance boost for isolation and compaction

2018-12-18 Thread Mel Gorman
On Tue, Dec 18, 2018 at 02:58:33PM +0100, Vlastimil Babka wrote: > On 12/18/18 2:51 PM, Mel Gorman wrote: > > On Tue, Dec 18, 2018 at 01:36:42PM +0100, Vlastimil Babka wrote: > >> On 12/15/18 12:03 AM, Mel Gorman wrote: > >>> When pageblocks get fragmented, watermarks are artifically boosted to >

Re: [PATCH 09/14] mm, compaction: Ignore the fragmentation avoidance boost for isolation and compaction

2018-12-18 Thread Vlastimil Babka
On 12/18/18 2:51 PM, Mel Gorman wrote: > On Tue, Dec 18, 2018 at 01:36:42PM +0100, Vlastimil Babka wrote: >> On 12/15/18 12:03 AM, Mel Gorman wrote: >>> When pageblocks get fragmented, watermarks are artifically boosted to pages >>> are reclaimed to avoid further fragmentation events. However, comp

Re: [PATCH 09/14] mm, compaction: Ignore the fragmentation avoidance boost for isolation and compaction

2018-12-18 Thread Mel Gorman
On Tue, Dec 18, 2018 at 01:36:42PM +0100, Vlastimil Babka wrote: > On 12/15/18 12:03 AM, Mel Gorman wrote: > > When pageblocks get fragmented, watermarks are artifically boosted to pages > > are reclaimed to avoid further fragmentation events. However, compaction > > is often either fragmentation-n

Re: [PATCH 09/14] mm, compaction: Ignore the fragmentation avoidance boost for isolation and compaction

2018-12-18 Thread Vlastimil Babka
On 12/15/18 12:03 AM, Mel Gorman wrote: > When pageblocks get fragmented, watermarks are artifically boosted to pages > are reclaimed to avoid further fragmentation events. However, compaction > is often either fragmentation-neutral or moving movable pages away from > unmovable/reclaimable pages. A