linux-kernel - Re: [PATCH] mm: get the folio's refcnt before clear PG_lru in folio_isolate

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Message-ID: <ZgQMn_-GHfcWtScR@casper.infradead.org>
Date: Wed, 27 Mar 2024 12:10:07 +0000
From: Matthew Wilcox <willy@...radead.org>
To: "zhaoyang.huang" <zhaoyang.huang@...soc.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Zhaoyang Huang <huangzhaoyang@...il.com>, steve.kang@...soc.com
Subject: Re: [PATCH] mm: get the folio's refcnt before clear PG_lru in
 folio_isolate_lru

On Wed, Mar 27, 2024 at 03:55:16PM +0800, zhaoyang.huang wrote:
> From: Zhaoyang Huang <zhaoyang.huang@...soc.com>
> 
> Bellowing race happens when the caller of folio_isolate_lru rely on the
> refcnt of page cache. Moving folio_get ahead of folio_test_clear_lru to
> make it more robust.

No, as explained to you multiple times before.