On Tue, Aug 08, 2023 at 10:22:29AM +0800, xiongwei.song@xxxxxxxxxxxxx wrote:
> From: Xiongwei Song <xiongwei.song@xxxxxxxxxxxxx>
>
> No any output from kmem.slabinfo, which is not friendly. Adding
> tips for it.
>
> Signed-off-by: Xiongwei Song <xiongwei.song@xxxxxxxxxxxxx>
> ---
> mm/memcontrol.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index e8ca4bdcb03c..58d3bd93890b 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -5002,10 +5002,8 @@ static ssize_t memcg_write_event_control(struct kernfs_open_file *of,
> #if defined(CONFIG_MEMCG_KMEM) && (defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG))
> static int mem_cgroup_slab_show(struct seq_file *m, void *p)
> {
> - /*
> - * Deprecated.
> - * Please, take a look at tools/cgroup/memcg_slabinfo.py .
> - */
> + seq_puts(m, "This file is deprecated.\n"
> + "Please use tools/cgroup/memcg_slabinfo.py, which is in kernel source.\n");
It'll break the ABI.
The only possible option here is to use WARN_ON_ONCE(), which will print once to dmesg.
But honestly I'm not sure we need it.
Thanks!
