linux-kernel - Re: [PATCH v12] mm: report per-page metadata information

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Date: Fri, 24 May 2024 13:36:24 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: David Rientjes <rientjes@...gle.com>
Cc: Sourav Panda <souravpanda@...gle.com>, 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, Vlastimil Babka
 <vbabka@...e.cz>, "Liam R. Howlett" <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, Matthew Wilcox <willy@...radead.org>,
 weixugc@...gle.com
Subject: Re: [PATCH v12] mm: report per-page metadata information

On Fri, 24 May 2024 13:00:06 -0700 (PDT) David Rientjes <rientjes@...gle.com> wrote:

> This would be a very useful extension to be able to provide observability 
> of per-page metadata overhead and the impact of things like HVO on the 
> overall footprint.  Today, we don't have observability for this memory 
> overhead.
> 
> Andrew, anything else that can be addressed before this is eligible for 
> staging in MM unstable?

I've asked Sourav to prepare a v13, largely to see if we can get a few
more eyeballs onto this.