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| author | Joe Thornber <ejt@redhat.com> | 2013-08-09 14:04:56 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2013-08-23 15:02:14 +0200 |
| commit | f722063ee01c0060488e1000006405449451cfa0 (patch) | |
| tree | affc57a30e5db203fac2133344e29c0dad4865e5 /lib/div64.c | |
| parent | dm btree: prefetch child nodes when walking tree for a dm_btree_del (diff) | |
| download | linux-f722063ee01c0060488e1000006405449451cfa0.tar.xz linux-f722063ee01c0060488e1000006405449451cfa0.zip | |
dm space map: optimise sm_ll_dec and sm_ll_inc
Prior to this patch these methods did a lookup followed by an insert.
Instead they now call a common mutate function that adjusts the value
according to a callback function. This avoids traversing the data
structures twice and hence improves performance.
Also factor out sm_ll_lookup_big_ref_count() for use by both
sm_ll_lookup() and sm_ll_mutate().
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'lib/div64.c')
0 files changed, 0 insertions, 0 deletions