From: Lance Yang <lance.yang@linux.dev>
To: ranxiaokai627@163.com
Cc: leitao@debian.org, ljs@kernel.org, ziy@nvidia.com,
liam@infradead.org, npache@redhat.com, ryan.roberts@arm.com,
dev.jain@arm.com, hughd@google.com, baohua@kernel.org,
david@kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, ran.xiaokai@zte.com.cn,
baolin.wang@linux.alibaba.com, akpm@linux-foundation.org
Subject: Re: [PATCH v3 1/2] mm: shmem: refactor thpsize_shmem_enabled_store() with sysfs_match_string()
Date: Thu, 21 May 2026 21:17:40 +0800 [thread overview]
Message-ID: <6a5a87f5-4f01-4b49-abdc-130165463d6c@linux.dev> (raw)
In-Reply-To: <20260518123238.56344-2-ranxiaokai627@163.com>
On 2026/5/18 20:32, ranxiaokai627@163.com wrote:
> From: Ran Xiaokai <ran.xiaokai@zte.com.cn>
>
> Inspired by commit 82d9ff648c6c ("mm: huge_memory: refactor
> anon_enabled_store() with set_anon_enabled_mode()"), refactor
> thpsize_shmem_enabled_store() using sysfs_match_string().
> This eliminates the duplicated spin_lock/unlock(), set/clear_bit(),
> calls across all branches, reducing code duplication.
>
> Behavioral change:
> Call start_stop_khugepaged() only when the mode actually changes.
> If unchanged, call set_recommended_min_free_kbytes() to preserve
> legacy watermark behavior. This avoids unnecessary khugepaged restarts.
>
> Tested with selftests ./run_kselftest.sh -t mm:ksft_thp.sh,
> all test cases passed.
>
> Signed-off-by: Ran Xiaokai <ran.xiaokai@zte.com.cn>
> ---
Thanks.
Tested-by: Lance Yang <lance.yang@linux.dev>
next prev parent reply other threads:[~2026-05-21 13:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-18 12:32 [PATCH v3 0/2] refactors thpsize_shmem_enabled_store() and thpsize_shmem_enabled_show() ranxiaokai627
2026-05-18 12:32 ` [PATCH v3 1/2] mm: shmem: refactor thpsize_shmem_enabled_store() with sysfs_match_string() ranxiaokai627
2026-05-19 2:22 ` Baolin Wang
2026-05-21 13:17 ` Lance Yang [this message]
2026-05-22 8:07 ` Barry Song
2026-05-22 10:39 ` Lorenzo Stoakes
2026-05-22 10:55 ` Lorenzo Stoakes
2026-05-25 7:52 ` ranxiaokai627
2026-05-18 12:32 ` [PATCH v3 2/2] mm: shmem: refactor thpsize_shmem_enabled_show() with helper arrays ranxiaokai627
2026-05-21 13:18 ` Lance Yang
2026-05-22 10:34 ` Lorenzo Stoakes
2026-05-22 10:44 ` Barry Song
2026-05-22 10:56 ` Lorenzo Stoakes
2026-05-22 10:54 ` Lorenzo Stoakes
2026-05-22 11:36 ` Barry Song
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