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]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1436FC369CB for ; Wed, 23 Apr 2025 13:08:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 086F26B0025; Wed, 23 Apr 2025 09:08:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 022836B00A5; Wed, 23 Apr 2025 09:08:28 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DA2F26B00A6; Wed, 23 Apr 2025 09:08:28 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id B92FB6B0025 for ; Wed, 23 Apr 2025 09:08:28 -0400 (EDT) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id D39331604F4 for ; Wed, 23 Apr 2025 13:08:28 +0000 (UTC) X-FDA: 83365337496.11.8482E45 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf07.hostedemail.com (Postfix) with ESMTP id 3FA3540004 for ; Wed, 23 Apr 2025 13:08:26 +0000 (UTC) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="FDi/aphc"; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf07.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1745413706; a=rsa-sha256; cv=none; b=RbIIFPSQykGMd4urfYZ4GOaEhwO0hdTshU15FjfSKAqt/4Ow7DI8YAI5F/mzC4YX7f6ev8 B54WLrGRolgfnfvGIVPMZRt9al6Se409N0zweydNjHCU2a/CUWtIIrdYhP6LeM4K2ZK1iO XiO9LzNEeU2h5PGoIMODyMJh7lzx0cU= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="FDi/aphc"; dmarc=pass (policy=quarantine) header.from=redhat.com; spf=pass (imf07.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1745413706; 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=Tw5QkYjbUX88v+0BEYQ53saJV7aVYcuDEPi0hJNXifI=; b=BbtiBaDNodb8bFaMpSqKPd+f3ybpSlCYxFgofWu/pdig7Th6E8c4L34+Q09fAMqZiBSy1E p1feevT8oovzcUIdkRVu4WEemYIUdsZSix8OUG4NhFz3IZhQU4MENmVxyKiPqDQ6i8w2I9 yskfqlnyiYFcVY64ERSvSdOxZ+mJ+6U= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1745413705; h=from:from: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:autocrypt:autocrypt; bh=Tw5QkYjbUX88v+0BEYQ53saJV7aVYcuDEPi0hJNXifI=; b=FDi/aphcOTSvhTIvFdfnb5wOjQ3JhtQyPRiDvUiVQwWwAIQVVxTjsVHP8x2Uajy4gOpaRQ 3vrEknmyc99dr6OMfrXfLnVJl5SCg295pycyTxgf5t7ihqPzgp321MUJ8E2BKGq58hAHoZ SAfIk//C9pTIItvAy/1/P4NR9OD0Y8g= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-622-UQ6XLazCPE2QhJhrniBXqw-1; Wed, 23 Apr 2025 09:08:24 -0400 X-MC-Unique: UQ6XLazCPE2QhJhrniBXqw-1 X-Mimecast-MFC-AGG-ID: UQ6XLazCPE2QhJhrniBXqw_1745413703 Received: by mail-wr1-f71.google.com with SMTP id ffacd0b85a97d-3a064c45effso983583f8f.3 for ; Wed, 23 Apr 2025 06:08:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745413703; x=1746018503; h=content-transfer-encoding:in-reply-to:organization:autocrypt :content-language:from:references:cc:to:subject:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=Tw5QkYjbUX88v+0BEYQ53saJV7aVYcuDEPi0hJNXifI=; b=wRnpUJmDjDnNNNdx82qDbFy7cDSW1QtyO6cNQL1BBEb/oCTVxe4sxHrmap/FkYyeNj DSqZVgK0B5eepMN1S8VQXlWhWVd/Hhrzaz2D7eVhckiZ44EJ4lNcOiDH1n03bdK4eveD MX8J1jX8/hi+eDf6COmM26RK0qQ3nLr0iNtLWNVFjrceJCEPYMGu0RmnL9axevAnkt6/ szlCTcdJ9/tvj4NKJCTvYSV0i6eLe/9DoNqH9mPb2VcYxF+MH6xghKKJAe2sxkccnJJ/ Ilr6zdwgRhT8A2HSSlU0pRMAIb6aITUQ+uAvBdbvYB2t0/fETzVA4V9VOs8q76HIrsj+ JplQ== X-Forwarded-Encrypted: i=1; AJvYcCV4OWlFXvQs53tffnjYWJSMXjp0xYUX9WT4nH7HMGqpPnWqGjURAbSq/d/uzhAJT2yPbOanN0Utww==@kvack.org X-Gm-Message-State: AOJu0Yy6kouk76NRKMxDIxWhAr8+tq51tS3Tff/CoeQQAYWqS7yBYIbt 7jwmENCXeDikjawO0vwYMtSac7lIhRjCR5fqjhBIUHQe6ur6itLGUlpJpt2h1pwuAYaDlSka3ft OgxQ0BxTDwoIRKVxFTLH8aXkHCdlorLTCKxhdcwqAVIn38b1I X-Gm-Gg: ASbGnctGi5blFq3JKI2NodrdOp38i1U5BGVN98URogJEJfAjhYOzQELy+hrEqU+q0U1 D114GDhPfJtqhhmblUM1c5nbH7vY36Uu5cr3jo4toQuf3uy5jqFmDEvdatkGymaK/lUPHoG+xzW hIzSUz+SexNnDYs/b65nywZX6BrG24rH+N4yZe/0GIJNqk1P/3wXonj3Rbh++WnAh3bVmykswgy cj/VrvURGzg7Vk17zpgEwPcAuduzRhi7u5qcqwmjV6T9NJfLSS78Z1UBVMwNkiKFFFda6GQxWHc P74gK5qqlzQXZcrGG4p445XpCDFoRSraHNUzUpOsKtM5ULyL4O/kY9zozy/SIb7ofO6BWC3lZfP J3r0h44XWkB3Hga0HjmNU6w1JCWNo/hhR1rTJ4Es= X-Received: by 2002:a05:6000:2907:b0:39e:f89b:85e2 with SMTP id ffacd0b85a97d-39efba5ae96mr16605121f8f.26.1745413703095; Wed, 23 Apr 2025 06:08:23 -0700 (PDT) X-Google-Smtp-Source: AGHT+IH1uPpvEz5P9ccgo4rkBC5tHZb6a8Sfm5Stca/6CyUjNxZGTYBy4H0ZspJUsugxSLDXR9DhaQ== X-Received: by 2002:a05:6000:2907:b0:39e:f89b:85e2 with SMTP id ffacd0b85a97d-39efba5ae96mr16605062f8f.26.1745413702602; Wed, 23 Apr 2025 06:08:22 -0700 (PDT) Received: from ?IPV6:2003:cb:c740:2c00:d977:12ba:dad2:a87f? (p200300cbc7402c00d97712badad2a87f.dip0.t-ipconnect.de. [2003:cb:c740:2c00:d977:12ba:dad2:a87f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-44092dbfac7sm25685485e9.37.2025.04.23.06.08.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Apr 2025 06:08:22 -0700 (PDT) Message-ID: <6663d393-bac8-4bcc-b36b-58b08143d959@redhat.com> Date: Wed, 23 Apr 2025 15:08:20 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RESEND 0/6] support ksm_stat showing at cgroup level To: xu.xin16@zte.com.cn, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, wang.yaxin@zte.com.cn, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, yang.yang29@zte.com.cn References: <20250422191407770210-193JBD0Fgeu5zqE2K@zte.com.cn> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20250422191407770210-193JBD0Fgeu5zqE2K@zte.com.cn> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 6rGLR1SQxietTGFiWk8rVH_tG8HPt4wFeGxrGIywsXU_1745413703 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 3FA3540004 X-Stat-Signature: k74wyn1woo9ce5opyy9j9y1937jnaji9 X-Rspam-User: X-HE-Tag: 1745413706-235198 X-HE-Meta: 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 8h/UJQkx 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 22.04.25 13:14, xu.xin16@zte.com.cn wrote: > From: xu xin > > With the enablement of container-level KSM (e.g., via prctl [1]), there is > a growing demand for container-level observability of KSM behavior. However, > current cgroup implementations lack support for exposing KSM-related > metrics. > > This patch introduces a new interface named ksm_stat > at the cgroup hierarchy level, enabling users to monitor KSM merging > statistics specifically for containers where this feature has been > activated, eliminating the need to manually inspect KSM information for > each individual process within the cgroup. > > Users can obtain the KSM information of a cgroup just by: > > # cat /sys/fs/cgroup/memory.ksm_stat > ksm_rmap_items 76800 > ksm_zero_pages 0 > ksm_merging_pages 76800 > ksm_process_profit 309657600 > > Current implementation supports cgroup v1 temporarily; cgroup v2 > compatibility is planned for future versions. As raised by Willy, we focus on v2. Independent of that, I strongly assume that Documentation/admin-guide/cgroup-v1/memory.rst needs care :) -- Cheers, David / dhildenb