linux-kernel - Re: [PATCH v4 4/9] binder: remove struct binder_lru

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Message-ID: <ZzziucEm3np6e7a0@casper.infradead.org>
Date: Tue, 19 Nov 2024 19:10:49 +0000
From: Matthew Wilcox <willy@...radead.org>
To: Carlos Llamas <cmllamas@...gle.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>,
	Joel Fernandes <joel@...lfernandes.org>,
	Christian Brauner <brauner@...nel.org>,
	Suren Baghdasaryan <surenb@...gle.com>,
	linux-kernel@...r.kernel.org, kernel-team@...roid.com,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>
Subject: Re: [PATCH v4 4/9] binder: remove struct binder_lru_page

On Tue, Nov 19, 2024 at 06:32:37PM +0000, Carlos Llamas wrote:
> Remove the redundant struct binder_lru_page concept. Instead, let's use
> available struct page->lru and page->private members directly to achieve
> the same functionality.

I'm not entirely happy to see this.  I expect to start a patch series in
the next six months which will remove users of page->lru.  page->private
is OK for now.  The goal is to shrink struct page to 8 bytes, but I
accept that 16 bytes may be the best we can do.