From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 883E6C43458 for ; Wed, 8 Jul 2026 07:52:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6960B6B00A2; Wed, 8 Jul 2026 03:52:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6454D6B00A3; Wed, 8 Jul 2026 03:52:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 536816B00A4; Wed, 8 Jul 2026 03:52:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 2AD7F6B00A2 for ; Wed, 8 Jul 2026 03:52:44 -0400 (EDT) Received: from smtpin30.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id B08824062B for ; Wed, 8 Jul 2026 07:52:43 +0000 (UTC) X-FDA: 84964842606.30.B438E4F Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf25.hostedemail.com (Postfix) with ESMTP id EAC1DA0002 for ; Wed, 8 Jul 2026 07:52:41 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=FnMLMPl+; spf=pass (imf25.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783497162; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=bWtEFlyIBpXMvKiDy1pvoBypm88zNYTkMdGjO/FtoKY=; b=QtwHTsb5Pcv4lpYkZKWwZl7vqVPRV0fWFnDPLwkwp741DPzhUJobPlY6BwSShD5bE76Xzz YHhGYjQ/Gp/SkFvwzinJ4vM7w+VC4j/Zc4isNRTqY8MjrBDH6T0CJRdQPPHU9wFHUbM0MX RXMKBYqv8PiZFeVw+bKCSF5nFFjgtcE= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783497162; b=HvgvmudswFDwaJv9W5CK7gU+GTIULhm6eOmhM8Ck163973NKwuK0QlnY+iKVHzIfe/QBGG iGw9q9tarh5lBlRMHmRgIneyIdPKfiKgIkBt0Z2/UQkLN7eadPpSmsqFL01qX+aj55mNOv hZtL2PBLDJPi/eDWqdMxptlJrTRhLyY= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=FnMLMPl+; spf=pass (imf25.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 1953242E89; Wed, 8 Jul 2026 07:52:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77A7E1F000E9; Wed, 8 Jul 2026 07:52:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783497161; bh=bWtEFlyIBpXMvKiDy1pvoBypm88zNYTkMdGjO/FtoKY=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=FnMLMPl+it7PS4Stb8ZECCtFTf5XbRZwfJtYsrRc7MXssz/cfKIqDNiEIQrRPMw+n oM0NmaftDSDUNHJ6JkTOlNLiJm0jVfyEaUx/0ViqTHJ7w5sbNxztzbhBDyWzgtfHIA mLOC+5nNOwAp25pb6cwkXnNRS4E87uWIbHNARD7v6j5mRu3hIEofBEObKyB2wjZUMN 1i3w5XgBcQlEKAe6AWxs6qtrrZhoDCZle3FXR2wkuQw+zn/dnIpsaMS0HAPHRb5vr5 1F/ZGYmhBJdh/N8/iW2bxz2zPA0ILyVcOMxshVcHNWR1FNhF/HJZT7gND8C18mdiLs IMuAVEAEwMW0g== Message-ID: Date: Wed, 8 Jul 2026 09:52:37 +0200 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, chengming.zhou@linux.dev Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260708122218298hWVcT2XtcT3UnK0QdTwuA@zte.com.cn> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20260708122218298hWVcT2XtcT3UnK0QdTwuA@zte.com.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: EAC1DA0002 X-Stat-Signature: fwtjgsxk4o3ynyuzi7jhk9uq79izku7o X-HE-Tag: 1783497161-821891 X-HE-Meta: U2FsdGVkX19mKjkjeizyPfii00dreVKUOLQ+alRhPwl8K+pEBRrbSDiFGwUsJ9hFf1h7VelP8o/nIIueoXvQB/z0P46P0eNrw1xBakBoVGbhv4x98q2+JO3eb6kqKLhY+2gq657jZUv5wzEbkPynSB6PcChJiD8+t+SL+eYWmXuy1QMHMn2S7wYEn17+yThwSONDUAYk3+37HS+ldS3g+HQ092PPaNj9TN1AFf/weaWBvb3g2sJbNQRx9acS2LYWDnpTzdWnUIJbgsKNCrG3IpR0Qgli8I7cxgPi8E2PdYBueEMmoVX1LGUKGrnddVDIsr6BF5BfVGzckVPiVZDprQAwIytrzj2iuaNtYn0lrkvOaljYQteD2PsgZbjeM5J38eCumFHZ7OmUI12/7yifK94w0c5l8QgnjMuK4iphALkLjUwIkG8amyPxRho2l/cTWiskEJSuzs/LWQGy4efNNfAEr425deu6w7rNEee8Jsb16bRkUHwRMaMx8GXzm8t5m1+/EcQCvAk02o/1NdMbD0Euazo0c3zmtgzTWZ6A1UvFhss7D9eLoJodmt6C7Wcr9aK5WtptJvpeccXUeIxjK+3Q2Nw5Jy948r4/4PVZH6+XNSvZpdTwJCMvL6AbCJ3zOR0mmCXCNOEfYsd2ZcVs1g8qXd65NGvu0OF90yM6FnFexLVawgDBI6J8tCjjPZJaAylsPRgNunNUV391ZUcxWdXhaAAnxxIHK/YWq33RBe0GZKif6cXISMNP+QKQoAUABGUYEed77Ba+LLrR5KFSKUC0Y8/IdD6B8UWZCPO9ixaUDh244fJdFHRSjtmpTUtsJ5jLjiR9r44goNjC0fCV+astFWnuqHIdRvItpi3iVZ0TpnHJjAPmW7qBJNCJYTl/IlTJGKudtMFqMQbTaqPHfDp2Ztw3xCEKAo74jDmpdMmsOt6X/K+8Mwt/3ur2lqyP59mC1IlTTchkISTB9jK o9ZRfbQ4 ZNy7U/4JUQUWADJSXqCxpx8BpC7rvAIV6NRad+34paQWWo6pp3sZJuioIwPTCitNZ+peE+Yk8RBny80KB/Tw2ad+1lWnApgSlTSGmCj2XXT+VwzjWxzfvuyxUaJ0SLT9zWwwW7m6bjU1wXteANjFj3Mmtcm3Gu57HptABSXT3cHFOMDULfLyox9doAUMwaHZ+DqMokdaIcAEWCAsbPc7Ydt5+CKswjew/Z3zOq8FbmGH8NIvfSbOao95JPFE96Zp+rTkpp2tgPpVjDHfov11rYrPxhEZPMMBRR93SJH/AbhuGS0pO6acooI8wmTbUBoBQEhRMqqYrLVI7mqpfEsGQkQUkNqdFt6FbZ/IxazYj6U2ePQo= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/8/26 06:22, 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. -- Cheers, David