Re: [PATCH] Docs/admin-guide/cgroup-v2: fix memory.stat doc details

[Michal Koutný]

On Sat, Jun 20, 2026 at 12:27:51PM +0000, Doehyun Baek <doehyunbaek@xxxxxxxxx> wrote:
> Fix minor cgroup v2 memory.stat documentation issues.  Correct the
> vmalloc per-node marker now that vmalloc uses the native NR_VMALLOC node
> stat, and document zswap_incomp as a byte-valued memory amount instead
> of as a page counter.
> 
> Fixes: c466412c73c3 ("mm: memcontrol: switch to native NR_VMALLOC vmstat counter")
> Fixes: 5ad41a38c364 ("mm: zswap: add per-memcg stat for incompressible pages")
> Signed-off-by: Doehyun Baek <doehyunbaek@xxxxxxxxx>
> ---
>  Documentation/admin-guide/cgroup-v2.rst | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
> index 993446ab66d0..ce6741f78f4f 100644
> --- a/Documentation/admin-guide/cgroup-v2.rst
> +++ b/Documentation/admin-guide/cgroup-v2.rst
> @@ -1570,7 +1570,7 @@ The following nested keys are defined.
>  	  sock (npn)
>  		Amount of memory used in network transmission buffers
>  
> -	  vmalloc (npn)
> +	  vmalloc
>  		Amount of memory used for vmap backed memory.

The vmalloc change looks OK...

>  
>  	  shmem
> @@ -1735,7 +1735,7 @@ The following nested keys are defined.
>  		Number of pages written from zswap to swap.
>  
>  	  zswap_incomp
> -		Number of incompressible pages currently stored in zswap
> +		Amount of memory used by incompressible pages currently stored in zswap
>  		without compression. These pages could not be compressed to
>  		a size smaller than PAGE_SIZE, so they are stored as-is.

...but what do you mean by this?
As I'm looking at the code in obj_cgroup_charge_zswap() and
memcg_page_state_output_unit(), I'd say those are pages and the docs is
thus alright.

Thanks,
Michal

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