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| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-05-24 17:11:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-25 08:39:10 -0700 |
| commit | c6a140bf164829769499b5e50d380893da39b29e (patch) | |
| tree | 0cfcbd5356cd3cebabba2334dcfdaec6ea47d816 /mm/page_alloc.c | |
| parent | a6cccdc36c966e51fd969560d870cfd37afbfa9c (diff) | |
| download | lwn-c6a140bf164829769499b5e50d380893da39b29e.tar.gz lwn-c6a140bf164829769499b5e50d380893da39b29e.zip | |
mm/compaction: reverse the change that forbade sync migraton with __GFP_NO_KSWAPD
It's uncertain this has been beneficial, so it's safer to undo it. All
other compaction users would still go in synchronous mode if a first
attempt at async compaction failed. Hopefully we don't need to force
special behavior for THP (which is the only __GFP_NO_KSWAPD user so far
and it's the easier to exercise and to be noticeable). This also make
__GFP_NO_KSWAPD return to its original strict semantics specific to bypass
kswapd, as THP allocations have khugepaged for the async THP
allocations/compactions.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Alex Villacis Lasso <avillaci@fiec.espol.edu.ec>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 77773329aa72..83eaa2eb72f8 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2107,7 +2107,7 @@ rebalance: sync_migration); if (page) goto got_pg; - sync_migration = !(gfp_mask & __GFP_NO_KSWAPD); + sync_migration = true; /* Try direct reclaim and then allocating */ page = __alloc_pages_direct_reclaim(gfp_mask, order, |