linux-kernel - Re: [PATCH v8 1/1] mm: report per-page metadata information

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Message-Id: <20240215161441.c8a2350a61f6929c0dbe9e7b@linux-foundation.org>
Date: Thu, 15 Feb 2024 16:14:41 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Sourav Panda <souravpanda@...gle.com>
Cc: corbet@....net, gregkh@...uxfoundation.org, rafael@...nel.org,
 mike.kravetz@...cle.com, muchun.song@...ux.dev, rppt@...nel.org,
 david@...hat.com, rdunlap@...radead.org, chenlinxuan@...ontech.com,
 yang.yang29@....com.cn, tomas.mudrunka@...il.com, bhelgaas@...gle.com,
 ivan@...udflare.com, pasha.tatashin@...een.com, yosryahmed@...gle.com,
 hannes@...xchg.org, shakeelb@...gle.com, kirill.shutemov@...ux.intel.com,
 wangkefeng.wang@...wei.com, adobriyan@...il.com, vbabka@...e.cz,
 Liam.Howlett@...cle.com, surenb@...gle.com, linux-kernel@...r.kernel.org,
 linux-fsdevel@...r.kernel.org, linux-doc@...r.kernel.org,
 linux-mm@...ck.org, willy@...radead.org, weixugc@...gle.com
Subject: Re: [PATCH v8 1/1] mm: report per-page metadata information

On Wed, 14 Feb 2024 14:57:40 -0800 Sourav Panda <souravpanda@...gle.com> wrote:

> Adds two new per-node fields, namely nr_memmap and nr_memmap_boot,
> to /sys/devices/system/node/nodeN/vmstat and a global Memmap field
> to /proc/meminfo. This information can be used by users to see how
> much memory is being used by per-page metadata, which can vary
> depending on build configuration, machine architecture, and system
> use.

Would this information be available by the proposed memory
allocation profiling?

https://lkml.kernel.org/r/20240212213922.783301-1-surenb@google.com