On Mon, 2014-06-09 at 11:39 +0200, Vlastimil Babka wrote: > commit 7ed695e069c3cbea5e1fd08f84a04536da91f584 upstream. > > Compaction of a zone is finished when the migrate scanner (which begins > at the zone's lowest pfn) meets the free page scanner (which begins at > the zone's highest pfn). This is detected in compact_zone() and in the > case of direct compaction, the compact_blockskip_flush flag is set so > that kswapd later resets the cached scanner pfn's, and a new compaction > may again start at the zone's borders. [...]
This can be applied to 3.2 (with some fuzz), but is it a worthwile fix there? (The other 2 compaction fixes you found don't seem to be applicable.) Ben. -- Ben Hutchings Any smoothly functioning technology is indistinguishable from a rigged demo.
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