Messages in this thread | | | Date | Wed, 21 Nov 2012 11:24:33 +0000 | From | Mel Gorman <> | Subject | Re: [PATCH 37/46] mm: numa: Add THP migration for the NUMA working set scanning fault case. |
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On Wed, Nov 21, 2012 at 10:21:43AM +0000, Mel Gorman wrote: > Note: This is very heavily based on a patch from Peter Zijlstra with > fixes from Ingo Molnar, Hugh Dickins and Johannes Weiner. That patch > put a lot of migration logic into mm/huge_memory.c where it does > not belong. This version puts tries to share some of the migration > logic with migrate_misplaced_page. However, it should be noted > that now migrate.c is doing more with the pagetable manipulation > than is preferred. The end result is barely recognisable so as > before, the signed-offs had to be removed but will be re-added if > the original authors are ok with it. > > Add THP migration for the NUMA working set scanning fault case. > > It uses the page lock to serialize. No migration pte dance is > necessary because the pte is already unmapped when we decide > to migrate. > > Signed-off-by: Mel Gorman <mgorman@suse.de> > --- > include/linux/migrate.h | 16 ++++ > mm/huge_memory.c | 55 +++++++----- > mm/internal.h | 2 + > mm/migrate.c | 212 ++++++++++++++++++++++++++++++++++++++--------- > 4 files changed, 226 insertions(+), 59 deletions(-) >
And now that I've released it I see that this almost certainly broke memcg as the memcontrol.c bits are missing. I'll need to carry them over.
-- Mel Gorman SUSE Labs
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