Hi recently I met this issue ./test_kmem ok 1 test_kmem_basic ok 2 test_kmem_memcg_deletion ok 3 test_kmem_proc_kpagecgroup ok 4 test_kmem_kernel_stacks ok 5 test_kmem_dead_cgroups memory.current 24514560 percpu 15280000 not ok 6 test_percpu_basic
In this test the memory.current 24514560, percpu 15280000, Diff ~9.2MB. #define MAX_VMSTAT_ERROR (4096 * 64 * get_nprocs()) in this part (8cpus) MAX_VMSTAT_ERROR is 4M memory. On the RT kernel, the labs(current - percpu) is 9.2M, that is the root cause for this failure. I am not sure what value is suitable for this case(2M per cpu maybe?)
