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2018-06-07kselftest/cgroup: fix a signedness bugDan Carpenter1-2/+2
"len" needs to be signed for the error handling to work. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-31selftests: cgroup/memcontrol: add basic test for socket accountingMike Rapoport1-0/+193
The test verifies that when there is active TCP connection, the memory.stat.sock and memory.current values are close. Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Acked-by: Roman Gushchin <guro@fb.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-31kselftest/cgroup: fix variable dereferenced before check warningRoman Gushchin1-4/+2
cg_name(const char *root, const char *name) is always called with non-empty root and name arguments, so there is no sense in checking it in the function body (after using in strlen()). Signed-off-by: Roman Gushchin <guro@fb.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-31selftests: cgroup/memcontrol: add basic test for swap controlsMike Rapoport3-0/+108
The new test verifies that memory.swap.max and memory.swap.current behave as expected for simple allocation scenarios Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Roman Gushchin <guro@fb.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
2018-05-31selftests: cgroup: add memory controller self-testsRoman Gushchin4-0/+1098
Cgroups are used for controlling the physical resource distribution (memory, CPU, io, etc) and often are used as basic building blocks for large distributed computing systems. Even small differences in the actual behavior may lead to significant incidents. The codebase is under the active development, which will unlikely stop at any time soon. Also it's scattered over different kernel subsystems, which makes regressions more probable. Given that, the lack of any tests is crying. This patch implements some basic tests for the memory controller, as well as a minimal required framework. It doesn't pretend for a very good coverage, but pretends to be a starting point. Hopefully, any following significant changes will include corresponding tests. Tests for CPU and io controllers, as well as cgroup core are next in the todo list. Signed-off-by: Roman Gushchin <guro@fb.com> Cc: Tejun Heo <tj@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: kernel-team@fb.com Cc: linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>