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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2268C76196 for ; Tue, 11 Apr 2023 08:55:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230045AbjDKIzT (ORCPT ); Tue, 11 Apr 2023 04:55:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229525AbjDKIzR (ORCPT ); Tue, 11 Apr 2023 04:55:17 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1492A1BD8 for ; Tue, 11 Apr 2023 01:54:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1681203272; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fXO0dCDv6zh0FlvPxvbQji5MhBlSwKK3xGEsZBZfCGU=; b=SVg7uH4nzG6O49pMtf2jZ59a9o3SHSpxThUxGE51IDoVHtRmGRNR/e26SaaC8Jwom/mPvx G39nYN0syn8NqddgBQ5tKb/Lxbrx1X5+/7CMrT8HqeaDJDSxyWqXG97ruoK+6ZlJWn+IH4 sO+Mnxs6Wa6OV5MdLtePRgDXFPg7X4o= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-341-3xjTA_ItPcS6ytDxAidDYA-1; Tue, 11 Apr 2023 04:54:31 -0400 X-MC-Unique: 3xjTA_ItPcS6ytDxAidDYA-1 Received: by mail-wm1-f71.google.com with SMTP id bh18-20020a05600c3d1200b003f05a99b571so7052567wmb.8 for ; Tue, 11 Apr 2023 01:54:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1681203270; x=1683795270; h=content-transfer-encoding:in-reply-to:organization:from:references :to:content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fXO0dCDv6zh0FlvPxvbQji5MhBlSwKK3xGEsZBZfCGU=; b=1C/9bjulz4w4YGHo1OCelkcNkJS8I0/lEpnQtdqiC4w98MavZuApMnmpgSu/v5kyO7 L9jDC6BqQxC0eRmcXLMn/Kjr3V38zZZd1Dya7o+LwJIlxD5w3JPVhEzxDtiKeIjIo2Ad JR24lBvFbl0twhEoZJGOcijmyQGuzrQD3O+BOQ1grbV51KkjQQnbKtNFFYXJssffnJmB w3tmVOgv5AAOQ/w5gxKp01m/Cadt9EodhEqJ7A0iuoLozyuIkphMZArUDSkVwDsgz3Zp Nmv8vHZEsFgLIAPQXTrSez6+Roe7Y7JL4Jsn6Me6sRBWqLjwfFscoHULHNpHPdCJBhIk pb8w== X-Gm-Message-State: AAQBX9eW31HPSQzxWJBMVM7OE/u3Iyd2pRJxnxQjdikuFPYKGoWVtlN3 lbhow52O4GXh8MYg3FHd1MxLLpnMGfgXjWB80k0pTpxL2i6dwf8GTyp/E9scOGdUANSUmpVnGlq ZujkUWElc4Exi787RZ0rPV6aH X-Received: by 2002:a7b:cd0b:0:b0:3ed:2b49:1571 with SMTP id f11-20020a7bcd0b000000b003ed2b491571mr1413891wmj.20.1681203268585; Tue, 11 Apr 2023 01:54:28 -0700 (PDT) X-Google-Smtp-Source: AKy350a0RVaM8f9wvDtq1CVFNtCQpX8tA3BlUIBH9g84G/r9Ow0VuvRAyeY7G0NDlPw7WF/BcbmYnA== X-Received: by 2002:a7b:cd0b:0:b0:3ed:2b49:1571 with SMTP id f11-20020a7bcd0b000000b003ed2b491571mr1413820wmj.20.1681203266790; Tue, 11 Apr 2023 01:54:26 -0700 (PDT) Received: from ?IPV6:2003:cb:c706:1300:6f08:1748:eba7:b2a9? (p200300cbc70613006f081748eba7b2a9.dip0.t-ipconnect.de. [2003:cb:c706:1300:6f08:1748:eba7:b2a9]) by smtp.gmail.com with ESMTPSA id l13-20020a1c790d000000b003f071466229sm15871490wme.17.2023.04.11.01.54.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 Apr 2023 01:54:26 -0700 (PDT) Message-ID: <5e010945-3603-d0ab-52c1-12cce3c85c3d@redhat.com> Date: Tue, 11 Apr 2023 10:54:25 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Subject: Re: [RFC PATCHv2] mm: introduce defer free for cma Content-Language: en-US To: "zhaoyang.huang" , Andrew Morton , Minchan Kim , Joonsoo Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Zhaoyang Huang , ke.wang@unisoc.com References: <1681116395-18633-1-git-send-email-zhaoyang.huang@unisoc.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <1681116395-18633-1-git-send-email-zhaoyang.huang@unisoc.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10.04.23 10:46, zhaoyang.huang wrote: > From: Zhaoyang Huang > > Continues page blocks are expensive for the system. Introducing defer free > mechanism to buffer some which make the allocation easier. The shrinker will > ensure the page block can be reclaimed when there is memory pressure. This looks unnecessarily complicated without any good motivation and performance numbers why we should even care. -- Thanks, David / dhildenb