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 467393FE369 for ; Thu, 9 Jul 2026 08:53:24 +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=1783587206; cv=none; b=QAYLtNcyrpJZEmKyq7wkZbiXuVbmPM16Dj6oYDp8feewqVqFoko4rK3Hce94b3Pnf+AuoXUgmOEKhqsi0QzFSTtgCynvYhXp+aGutqOK9UksPLzQgFIL6Vwm9+T8XMVGgg1TFbxBhgvjGfYLvQNIVAPAD8MfK6yftW++scYQxQI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783587206; c=relaxed/simple; bh=IODeSbclCdypHlO9VXstOgWw0sPWIuhhCcZgIjoLZGo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=YG0qye8rAR0l13eN9iUXxkQ3I1tcjM7w9eXSUH+4uzb/kIF6cQNTRYeEQAO0lgVmZFZmlZm+z0o0MJXEdoy2+MUgz3XSgcQ/QvT+8Q0YkRG5412Ss+dBM4i3QCWZWxpCbSwJfbYJZCsnRe0kj6jHmxtjjJfN4fLkoyylxoWB0Ho= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Lho/GWYk; 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="Lho/GWYk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8FA571F000E9; Thu, 9 Jul 2026 08:53:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783587204; bh=iSpS/PyLHRyxppurqsi8ogug4ks/KZBHQbV+umcH6ws=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Lho/GWYkGrBHkMfmwLwfv6NqJTWcb2ohNsjvFDssYybPnjyq1AUnoIPuYYFMlkVDD UUv6gqkbIUr9IKAN5hjIPhC6yCV8ikXP6AUTCCKUXwZsCFHKaRJpcqJzP+b73S0qH+ 4jPOVLQ2c4oqHEh4bQ2LAmUK3X03ZdiCsagawrCScneU+XH4EIDuyBGz/oh2aCZ0iO UtcHvWMfGOgxnpMnGxqhBKfv2a0blF9c5cjYNrtZ7FwTvb6oPwk/C02e3wi9fKrAcQ usrunzTQ0/YoAclMdQYUGmKZglio6NbMCHM5LgvfmVTjv0yjhKMPjX+0Ji2bwEy12o kZwrmxIvA8ovg== Message-ID: <1cf4efb5-1876-482e-8a92-a211570e91c8@kernel.org> Date: Thu, 9 Jul 2026 10:53:20 +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 RESEND 2/2] mm/ksm: Use precise linear_page_index instead of the whole address space To: xu.xin16@zte.com.cn, akpm@linux-foundation.org Cc: chengming.zhou@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260709111055267XMDer8X5AKmOhy46TRjwa@zte.com.cn> 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 7/9/26 05:10, xu.xin16@zte.com.cn wrote: >>> From: xu xin >>> >>> Since an earlier commit introduced the linear_page_index to struct >>> ksm_rmap_item[1], allowing for optimizing the RMAP walk, we can use it >>> to locate more precisely all processes that hit the KSM page, which will >>> decrease a lot of unvalid iterations. >> >> It's awkward to reference a commit by a mailing list link. The other patch is >> not upstream yet. Best to wait for that to go in first, so you can properly >> reference the commit. > > Ok, I'm going to resend this after that referenced patch is upstream. Alternatively, just mention that we now have linear_page_index available that we can use here, without referring to the other patch/commit. That would probably be cleanest. -- Cheers, David