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authorLi Zefan <lizf@cn.fujitsu.com>2009-02-18 14:48:14 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-02-18 15:37:53 -0800
commitb851ee7921fabdd7dfc96ffc4e9609f5062bd12b (patch)
tree7f226e34bbb825d3fdb6967f5c4fb77d5983eb06
parentb6d6c5175809934e04a606d9193ef04924a7a7d9 (diff)
cgroups: update documentation about css_set hash table
The css_set hash table was introduced in 2.6.26, so update the documentation accordingly. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/cgroups/cgroups.txt6
1 files changed, 2 insertions, 4 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index d9e5d6f41b9..93feb844448 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -252,10 +252,8 @@ cgroup file system directories.
When a task is moved from one cgroup to another, it gets a new
css_set pointer - if there's an already existing css_set with the
desired collection of cgroups then that group is reused, else a new
-css_set is allocated. Note that the current implementation uses a
-linear search to locate an appropriate existing css_set, so isn't
-very efficient. A future version will use a hash table for better
-performance.
+css_set is allocated. The appropriate existing css_set is located by
+looking into a hash table.
To allow access from a cgroup to the css_sets (and hence tasks)
that comprise it, a set of cg_cgroup_link objects form a lattice;