cgroup/cpuset-v1: Add deprecation messages to memory_spread_page and memory_spread_slab

There is MPOL_INTERLEAVE for user explicit allocations.
Deprecate spreading of allocations that users carry out unwittingly.
Use straight warning level for slab spreading since such a knob is
unnecessarily intertwined with slab allocator.

Signed-off-by: Michal Koutný <mkoutny@suse.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/cgroup/cpuset-v1.c b/kernel/cgroup/cpuset-v1.c
index 7d310d8bb1ad258d4b42aebb4f9cb5c2fc9fa63c..fcf3fdac21a2dbfcbbcbe86d89312c1bb40da7f4 100644 (file)
--- a/kernel/cgroup/cpuset-v1.c
+++ b/kernel/cgroup/cpuset-v1.c
@@ -482,9 +482,11 @@ static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft,
                cpuset_memory_pressure_enabled = !!val;
                break;
        case FILE_SPREAD_PAGE:
+               pr_info_once("cpuset.%s is deprecated\n", cft->name);
                retval = cpuset_update_flag(CS_SPREAD_PAGE, cs, val);
                break;
        case FILE_SPREAD_SLAB:
+               pr_warn_once("cpuset.%s is deprecated\n", cft->name);
                retval = cpuset_update_flag(CS_SPREAD_SLAB, cs, val);
                break;
        default: