From: Lance Yang <lance.yang@linux.dev>
To: yintirui@huawei.com
Cc: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org,
ziy@nvidia.com, baolin.wang@linux.alibaba.com,
liam@infradead.org, npache@redhat.com, ryan.roberts@arm.com,
dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev,
vbabka@kernel.org, yang.shi@linux.alibaba.com,
wangkefeng.wang@huawei.com, chenjun102@huawei.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH] mm/huge_memory: update file PMD counter before folio_put()
Date: Tue, 26 May 2026 20:56:08 +0800 [thread overview]
Message-ID: <20260526125608.60396-1-lance.yang@linux.dev> (raw)
In-Reply-To: <20260526101337.1984081-1-yintirui@huawei.com>
On Tue, May 26, 2026 at 06:13:37PM +0800, Yin Tirui wrote:
>__split_huge_pmd_locked() updates the file/shmem RSS counter after
>dropping the PMD mapping's folio reference. If folio_put() drops the
>last reference, mm_counter_file() can later read freed folio state via
>folio_test_swapbacked().
>
>Move the counter update before folio_put().
>
>Fixes: fadae2953072 ("thp: use mm_file_counter to determine update which rss counter")
>Cc: <stable@vger.kernel.org>
>Signed-off-by: Yin Tirui <yintirui@huawei.com>
>---
Thanks! Feel free to add:
Reviewed-by: Lance Yang <lance.yang@linux.dev>
next prev parent reply other threads:[~2026-05-26 12:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 10:13 [PATCH] mm/huge_memory: update file PMD counter before folio_put() Yin Tirui
2026-05-26 11:05 ` Lorenzo Stoakes
2026-05-26 11:17 ` Yin Tirui
2026-05-26 12:25 ` David Hildenbrand (Arm)
2026-05-27 16:10 ` Lorenzo Stoakes
2026-05-26 12:56 ` Lance Yang [this message]
2026-05-27 10:15 ` Dev Jain
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