linux-kernel - Re: [PATCHv2 05/11] mm/truncate: Use folio_set_dropbehind() instead of deactivate_file

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Message-ID: <CAOUHufa1vRhiwCNvVa+ztcrFix9keAgbV0E7BxFN9VKAZ+7Z5A@mail.gmail.com>
Date: Wed, 15 Jan 2025 13:43:10 -0700
From: Yu Zhao <yuzhao@...gle.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, 
	"Matthew Wilcox (Oracle)" <willy@...radead.org>, Jens Axboe <axboe@...nel.dk>, 
	"Jason A. Donenfeld" <Jason@...c4.com>, Andi Shyti <andi.shyti@...ux.intel.com>, 
	Chengming Zhou <chengming.zhou@...ux.dev>, Christian Brauner <brauner@...nel.org>, 
	Christophe Leroy <christophe.leroy@...roup.eu>, Dan Carpenter <dan.carpenter@...aro.org>, 
	David Airlie <airlied@...il.com>, David Hildenbrand <david@...hat.com>, Hao Ge <gehao@...inos.cn>, 
	Jani Nikula <jani.nikula@...ux.intel.com>, Johannes Weiner <hannes@...xchg.org>, 
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Josef Bacik <josef@...icpanda.com>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Miklos Szeredi <miklos@...redi.hu>, Nhat Pham <nphamcs@...il.com>, 
	Oscar Salvador <osalvador@...e.de>, Ran Xiaokai <ran.xiaokai@....com.cn>, 
	Rodrigo Vivi <rodrigo.vivi@...el.com>, Simona Vetter <simona@...ll.ch>, 
	Steven Rostedt <rostedt@...dmis.org>, Tvrtko Ursulin <tursulin@...ulin.net>, 
	Vlastimil Babka <vbabka@...e.cz>, Yosry Ahmed <yosryahmed@...gle.com>, intel-gfx@...ts.freedesktop.org, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, 
	linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCHv2 05/11] mm/truncate: Use folio_set_dropbehind() instead
 of deactivate_file_folio()

On Wed, Jan 15, 2025 at 2:32 AM Kirill A. Shutemov
<kirill.shutemov@...ux.intel.com> wrote:
>
> The recently introduced PG_dropbehind allows for freeing folios
> immediately after writeback. Unlike PG_reclaim, it does not need vmscan
> to be involved to get the folio freed.
>
> The new flag allows to replace whole deactivate_file_folio() machinery
> with simple folio_set_dropbehind().
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Acked-by: Yu Zhao <yuzhao@...gle.com>