diff options
| author |   Michal Hocko <mhocko@suse.com> | 2016-05-20 16:56:53 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-20 17:58:30 -0700 |
| commit | c5d01d0d18e2ab7a21f0371b00e4d1a06f79cdf5 (patch) | |
| tree | 5ebb7038a7e113dde69e6a471169cd3e4a6afdcd /include/linux/compaction.h | |
| parent | mm, compaction: update compaction_result ordering (diff) | |
| download | linux-dev-c5d01d0d18e2ab7a21f0371b00e4d1a06f79cdf5.tar.xz linux-dev-c5d01d0d18e2ab7a21f0371b00e4d1a06f79cdf5.zip | |
mm, compaction: simplify __alloc_pages_direct_compact feedback interface
__alloc_pages_direct_compact communicates potential back off by two
variables:
- deferred_compaction tells that the compaction returned
COMPACT_DEFERRED
- contended_compaction is set when there is a contention on
zone->lock resp. zone->lru_lock locks
__alloc_pages_slowpath then backs of for THP allocation requests to
prevent from long stalls. This is rather messy and it would be much
cleaner to return a single compact result value and hide all the nasty
details into __alloc_pages_direct_compact.
This patch shouldn't introduce any functional changes.
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/compaction.h')
0 files changed, 0 insertions, 0 deletions