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[6/9] RFC cgroup/cpuset-v1: Add deprecation warnings to memory_migrate

Message ID 20250304153801.597907-7-mkoutny@suse.com (mailing list archive)
State New
Headers show
Series cgroup v1 deprecation warnings | expand

Checks

Context Check Description
shin/vmtest-linus-master-PR success PR summary
shin/vmtest-linus-master-VM_Test-0 success Logs for build-kernel

Commit Message

Michal Koutný March 4, 2025, 3:37 p.m. UTC 
Memory migration (between cgroups) was given up in v2 due to performance
reasons of its implementation. Migration between NUMA nodes within one
memcg may still make sense to modify affinity at runtime though.

Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Michal Koutný <mkoutny@suse.com>
---
 kernel/cgroup/cpuset-v1.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/kernel/cgroup/cpuset-v1.c b/kernel/cgroup/cpuset-v1.c
index 05d3622ea41e5..6155d890f10a4 100644
--- a/kernel/cgroup/cpuset-v1.c
+++ b/kernel/cgroup/cpuset-v1.c
@@ -436,6 +436,7 @@  static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft,
 		retval = cpuset_update_flag(CS_SCHED_LOAD_BALANCE, cs, val);
 		break;
 	case FILE_MEMORY_MIGRATE:
+		pr_warn_once("cpuset.%s is deprecated\n", cft->name);
 		retval = cpuset_update_flag(CS_MEMORY_MIGRATE, cs, val);
 		break;
 	case FILE_MEMORY_PRESSURE_ENABLED: