linux-kernel - Re: [PATCH v2 2/2] docs: clarify THP admin guide about (File|Shmem)PmdMapped and ShmemHugePage

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Message-ID: <Z-_UG_zVLZNjxPD6@archie.me>
Date: Fri, 4 Apr 2025 19:44:11 +0700
From: Bagas Sanjaya <bagasdotme@...il.com>
To: "Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jonathan Corbet <corbet@....net>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, willy@...radead.org,
	David Hildenbrand <david@...hat.com>, da.gomez@...nel.org,
	mcgrof@...nel.org, gost.dev@...sung.com, linux-doc@...r.kernel.org,
	Pankaj Raghav <p.raghav@...sung.com>
Subject: Re: [PATCH v2 2/2] docs: clarify THP admin guide about
 (File|Shmem)PmdMapped and ShmemHugePage

On Fri, Apr 04, 2025 at 12:01:59PM +0200, Pankaj Raghav (Samsung) wrote:
> -The number of file transparent huge pages mapped to userspace is available
> -by reading ShmemPmdMapped and ShmemHugePages fields in ``/proc/meminfo``.
> -To identify what applications are mapping file transparent huge pages, it
> -is necessary to read ``/proc/PID/smaps`` and count the FilePmdMapped fields
> -for each mapping.
> +The number of PMD-sized transparent huge pages currently used by
"In similar fashion, the number ..."
> +tmpfs/shmem is available by reading the ShmemHugePages field
> +in ``/proc/meminfo``. The number of these huge pages that are mapped to userspace
> +is available by reading ShmemPmdMapped field in ``proc/meminfo``. To identify
> +what applications are mapping these huge pages, it is necessary to read
> +``/proc/PID/smaps`` and count the ShmemPmdMapped fields for each mapping.
>  

Thanks.

-- 
An old man doll... just what I always wanted! - Clara

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