From b37f2d4de6dfce4bfd6df311af80e4d61458ee1e Mon Sep 17 00:00:00 2001 From: Nikanth Karthikesan Date: Tue, 30 Jun 2009 11:41:36 -0700 Subject: [PATCH] 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 Signed-off-by: Li Zefan Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/cgroups/cpusets.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) 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 ----------------- -- 2.32.0.93.g670b81a890