]> err.no Git - linux-2.6/commit
cpusets: fix bug when adding nonexistent cpu or mem
authorLai Jiangshan <laijs@cn.fujitsu.com>
Fri, 6 Jun 2008 05:46:32 +0000 (22:46 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 6 Jun 2008 18:29:11 +0000 (11:29 -0700)
commit37340746a66e5e7feed5945f28cb75d90a8fd9f6
treeb056132aad9eab38886b7359797302cbeeabc3fa
parentaae8679b0ebcaa92f99c1c3cb0cd651594a43915
cpusets: fix bug when adding nonexistent cpu or mem

Adding a nonexistent cpu to a cpuset will be omitted quietly.  It should
return -EINVAL.

Example: (real_nr_cpus <= 4 < NR_CPUS or cpu#4 was just offline)

# cat cpus
0-1
# /bin/echo 4 > cpus
# /bin/echo $?
0
# cat cpus

#

The same occurs when add a nonexistent mem.
This patch will fix this bug.
And when *buf == "", the check is unneeded.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Paul Jackson <pj@sgi.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/cpuset.c