From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 21AD63F86E6 for ; Tue, 26 May 2026 12:27:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779798456; cv=none; b=A0lnVz1CDibLO/5pKlUcBZIL0Y13Au/Xw9TYIAqhduyYVRV1xUt07GXplZII3lzhPPm/eAa0y2ofZRaIlFSOboXaY2tPVsrNLnShcRWtse7NL7WTddcKvAoWZmlSIgF+MFmxo2j42k7aO8JI4nTTUDpOzQh3k15WbRE4iAAo3Wc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779798456; c=relaxed/simple; bh=sM6PwXktlGOAJVK1+F5ZGdTchz3PeWb6BRjG6ft2uFo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=X/OhbMj/l59GGrtulUcvdN0WqyVqleCG0dU4Hw2xBtP55wpUNVx4xPR4AujHiF9+lEBYcAJ8QHOz5I4LzQ7GgKHcTVTfzM5ED6cJ+XY1H7b88b7jibRhjEmNSaJK2+F34wmpOYwsh39PfVxtNSu3vDkIAHdh/LrjD5WqFXm2uQ8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jvMksGPn; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jvMksGPn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 451F71F000E9; Tue, 26 May 2026 12:27:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779798454; bh=S7mvxq8Xrq3CqdfmGxEeg+vF6DmI+9bFFd+7wbBfzm0=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=jvMksGPnwc9gaA3KqJ8OWRmhh9Ncdzp5xEHPKKFdqT8vsZItR0VQj1yvMvKHHXS78 V5MooOxdVH5CdXqv6Xr0pWO/XBDrIBEXkU7mKIEQ/iPYLt8dKmKRLqzrDwGHBHBujT cf3iwt6FksUnc1VJMvpCIi3kbRhPOmcmyEjRK1fowWZ/ji9fz90WGAIuB3PuzI75ZG ugpvw/oILmdOipfsbQ0XCJiBpic+K0vX0W3okCZkHkLjI0c6cEh5B6AnEENwHurKM/ aYUcjM1vBt9eEOVg37CZNsrywNS8ghxPr9Pq+Q+KXhzt8+p3TpXuffDAGBjyfK0npN lUzJMdj6dyMdQ== Message-ID: <65eb2656-e25f-46c7-a82c-7478f8aa4d14@kernel.org> Date: Tue, 26 May 2026 14:27:29 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 1/2] mm: shmem: refactor thpsize_shmem_enabled_store() with sysfs_match_string() To: ranxiaokai627@163.com, ljs@kernel.org, hughd@google.com, baolin.wang@linux.alibaba.com, akpm@linux-foundation.org Cc: leitao@debian.org, ziy@nvidia.com, liam@infradead.org, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, ran.xiaokai@zte.com.cn References: <20260525102700.68707-1-ranxiaokai627@163.com> <20260525102700.68707-2-ranxiaokai627@163.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/25/26 12:26, ranxiaokai627@163.com wrote: > From: Ran Xiaokai > > 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 > Reviewed-by: Baolin Wang > Reviewed-by: Barry Song > Tested-by: Baolin Wang > Tested-by: Lance Yang > --- Acked-by: David Hildenbrand (arm) -- Cheers, David