linux-kernel - Re: [PATCHv3 04/11] mm/zswap: Use PG_dropbehind instead of PG

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Message-ID: <CAKEwX=POeBSHBXxdNWua5cPJ=7+P6x4qG6gWgN0HnT2K+_ULtQ@mail.gmail.com>
Date: Thu, 30 Jan 2025 09:39:52 -0800
From: Nhat Pham <nphamcs@...il.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>, 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>, Yu Zhao <yuzhao@...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: [PATCHv3 04/11] mm/zswap: Use PG_dropbehind instead of PG_reclaim

On Thu, Jan 30, 2025 at 2:02 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.

Neat!

>
> Instead of using folio_set_reclaim(), use folio_set_dropbehind() in
> zswap_writeback_entry().
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Acked-by: David Hildenbrand <david@...hat.com>
> Acked-by: Yosry Ahmed <yosryahmed@...gle.com>

Acked-by: Nhat Pham <nphamcs@...il.com>