On Wed, Aug 31, 2011 at 11:56:51PM +0900, Minchan Kim wrote:

On Wed, Aug 31, 2011 at 01:37:10PM +0200, Johannes Weiner wrote:

quoted

It's a teensy-bit awkward that isolate_migratepages() can return
success without actually isolating any new pages, just because there
are still some pages left from a previous run (cc->nr_migratepages is
maintained across isolation calls).

If migrate_pages fails, we reset cc->nr_migratepages to zero in compact_zone.
Am I missing something?

Brainfart on my side, sorry.  It's all good, then :)

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