path: root/Documentation/cgroups
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authorNikanth Karthikesan <knikanth@suse.de>2009-06-30 11:41:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-30 18:56:01 -0700
commitb37f2d4de6dfce4bfd6df311af80e4d61458ee1e (patch)
tree1d823c4f80e32dd7020212c60b08f9fa60ff3f9a /Documentation/cgroups
parentd7831a0bdf06b9f722b947bb0c205ff7d77cebd8 (diff)
cpusets: document adding/removing cpus to cpuset elaborately
By writing a tasks's pid to the file, a process adds that task to that cgroup/cpuset. But to add a cpu/mem to a cpuset, the new list of cpus should be written to the cpuset.mems file which would replace the old list of cpus. Make this clearer in the documentation. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> 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>
Diffstat (limited to 'Documentation/cgroups')
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/cgroups/cpusets.txt b/Documentation/cgroups/cpusets.txt
index f9ca389dddf..1d7e9784439 100644
--- a/Documentation/cgroups/cpusets.txt
+++ b/Documentation/cgroups/cpusets.txt
@@ -777,6 +777,18 @@ in cpuset directories:
# /bin/echo 1-4 > cpus -> set cpus list to cpus 1,2,3,4
# /bin/echo 1,2,3,4 > cpus -> set cpus list to cpus 1,2,3,4
+To add a CPU to a cpuset, write the new list of CPUs including the
+CPU to be added. To add 6 to the above cpuset:
+# /bin/echo 1-4,6 > cpus -> set cpus list to cpus 1,2,3,4,6
+Similarly to remove a CPU from a cpuset, write the new list of CPUs
+without the CPU to be removed.
+To remove all the CPUs:
+# /bin/echo "" > cpus -> clear cpus list
2.3 Setting flags