Re: [PATCH v7 08/10] memcg: enable accounting for posix_timers_cache slab

[Shakeel Butt]

On Mon, Jul 26, 2021 at 10:34 PM Vasily Averin <vvs@xxxxxxxxxxxxx> wrote:
>
> A program may create multiple interval timers using timer_create().
> For each timer the kernel preallocates a "queued real-time signal",
> Consequently, the number of timers is limited by the RLIMIT_SIGPENDING
> resource limit. The allocated object is quite small, ~250 bytes,
> but even the default signal limits allow to consume up to 100 megabytes
> per user.
>
> It makes sense to account for them to limit the host's memory consumption
> from inside the memcg-limited container.
>
> Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>