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| author | Hugh Dickins <hughd@google.com> | 2013-02-22 16:36:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:24 -0800 |
| commit | ef53d16cded7f89b3843b7a96970dab897843ea5 (patch) | |
| tree | 3098af6a91b088212acb5c459ee9af1488cfdfe1 /kernel | |
| parent | 56f31801ccdecb420d0d1fd2bf9f337c355214a9 (diff) | |
| download | op-kernel-dev-ef53d16cded7f89b3843b7a96970dab897843ea5.zip op-kernel-dev-ef53d16cded7f89b3843b7a96970dab897843ea5.tar.gz | |
ksm: allocate roots when needed
It is a pity to have MAX_NUMNODES+MAX_NUMNODES tree roots statically
allocated, particularly when very few users will ever actually tune
merge_across_nodes 0 to use more than 1+1 of those trees. Not a big
deal (only 16kB wasted on each machine with CONFIG_MAXSMP), but a pity.
Start off with 1+1 statically allocated, then if merge_across_nodes is
ever tuned, allocate for nr_node_ids+nr_node_ids. Do not attempt to
free up the extra if it's tuned back, that would be a waste of effort.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Petr Holasek <pholasek@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Izik Eidus <izik.eidus@ravellosystems.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions
