linux-kernel - Re: [RFC PATCH 02/11] rust: add `pages` module for handling page allocation

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Date:   Fri, 5 May 2023 05:09:52 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Andreas Hindborg <nmi@...aspace.dk>
Cc:     Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>,
        Keith Busch <kbusch@...nel.org>,
        Damien Le Moal <Damien.LeMoal@....com>,
        Hannes Reinecke <hare@...e.de>,
        lsf-pc@...ts.linux-foundation.org, rust-for-linux@...r.kernel.org,
        linux-block@...r.kernel.org,
        Andreas Hindborg <a.hindborg@...sung.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        open list <linux-kernel@...r.kernel.org>, gost.dev@...sung.com
Subject: Re: [RFC PATCH 02/11] rust: add `pages` module for handling page
 allocation

On Wed, May 03, 2023 at 11:06:59AM +0200, Andreas Hindborg wrote:
> From: Andreas Hindborg <a.hindborg@...sung.com>
> 
> This patch adds support for working with pages of order 0. Support for pages
> with higher order is deferred. Page allocation flags are fixed in this patch.
> Future work might allow the user to specify allocation flags.
> 
> This patch is a heavily modified version of code available in the rust tree [1],
> primarily adding support for multiple page mapping strategies.

This also seems misaligned with the direction of Linux development.
Folios are the future, pages are legacy.  Please, ask about what's
going on before wasting time on the past.