tree d5826a4d1c3b1853be20c6049311eb52f1a98360
parent 1742f19fa920cdd6905f0db5898524dde22ab2a4
author Christoph Lameter <clameter@engr.sgi.com> 1143014902 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1143042840 -0800

[PATCH] zone_reclaim: additional comments and cleanup

Add some comments to explain how zone reclaim works.  And it fixes the
following issues:

- PF_SWAPWRITE needs to be set for RECLAIM_SWAP to be able to write
  out pages to swap. Currently RECLAIM_SWAP may not do that.

- remove setting nr_reclaimed pages after slab reclaim since the slab shrinking
  code does not use that and the nr_reclaimed pages is just right for the
  intended follow up action.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>