linux-kernel - Re: [PATCH v2] intel_th: avoid using deprecated page->mapping, index fields

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Message-ID: <ad078359-4314-4c57-9625-9b12439a9e12@lucifer.local>
Date: Wed, 29 Jan 2025 11:51:17 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>
Subject: Re: [PATCH v2] intel_th: avoid using deprecated page->mapping, index
 fields

On Wed, Jan 29, 2025 at 01:39:06PM +0200, Alexander Shishkin wrote:
> Lorenzo Stoakes <lorenzo.stoakes@...cle.com> writes:
>
> > Thanks very much! Yeah just keen to get this in as we are moving towards
> > removing these fields very soon.
>
> My understanding is that this is a part of larger effort to reduce
> struct page to 8 bytes and an optionally dynamically allocated slightly
> larger structure, is that correct? Just curious.

Broadly yes indeed, it's a big lot of unnecessary memory usage and a key long
term mm project (of Matthew's, I am merely a humble helper in this area :)

If you're curious, you can read Matthew's latest update on the project at [0].

[0]:https://lore.kernel.org/linux-mm/Z37pxbkHPbLYnDKn@casper.infradead.org/

>
> > Could you take this in your tree? I think that'd work best.
>
> Sure, will do.

Thanks!

>
> Thanks,
> --
> Alex