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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7CAFC433FE for ; Mon, 27 Sep 2021 20:45:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF8C561074 for ; Mon, 27 Sep 2021 20:45:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236741AbhI0Ur1 (ORCPT ); Mon, 27 Sep 2021 16:47:27 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:37046 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237080AbhI0UrW (ORCPT ); Mon, 27 Sep 2021 16:47:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1632775544; 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; bh=YXVqJbv8Jttk1+XcooW+mbayYSjb6BfIJ+KhdOYULFQ=; b=XDCilIPnG1PeNY+fmSmALCtduIzLoCLTLHiyACpac6M1IV9qwT58Bc5cqHsr6SaKyn4CEh WUuB/gjnHWG6wFFYgIpN8EFyoD6iFjCkHgr5DoXD4etJvVZ5aB4G/1JRF3jtTIdqxNG+sQ PKJ5KSP18ypfk8nrGsR6IgDVI3UxHvM= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-428-vOt_mLqAOpislQCQA_n64g-1; Mon, 27 Sep 2021 16:45:42 -0400 X-MC-Unique: vOt_mLqAOpislQCQA_n64g-1 Received: by mail-wr1-f72.google.com with SMTP id a17-20020adfed11000000b00160525e875aso6906061wro.23 for ; Mon, 27 Sep 2021 13:45:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:subject:to:cc:references:from:organization :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=YXVqJbv8Jttk1+XcooW+mbayYSjb6BfIJ+KhdOYULFQ=; b=HCzf8SyYWKzhKvYqwwZOxKXSxqxvBvyLM1ZcwK+ciOsioot19GUu3c/2/7QNY75CYd eVl59VEt7lt3InJW9+Gi5AxK+lOnUT8pHt35ygvL9Q50r2hAWZ3af5I4skZEg758kPrL V5PKHlWzvAeyc2nnwYVkOWFicaE9wcTZYF74C1N+XAkOqSc4Qx33Jefih/+ehC4IPE8H FMgq64LPwLZ6/DXrDL6cmvSDM9Jla02mLU9DOsGoHmADtzyJrYDQTU3aXWNt3wu7tRKS gLKFotvnH4JRGgfUDaRx1pT7cxz9piMK37TDvO8+au+k72hMecmbwZkBMfG63dzhMH2Y 9Ujg== X-Gm-Message-State: AOAM53364elswUDTuEsmahaeQAIfb0PodX7SU40L4VTI0Ft6HWPRjiGe 28S8G1MrlrUDOJs7GiEMEoazTeMA6+swU/rlWeh7qaNpK9mrf4+oNevfa+ETHW/9kJtd7hQ/UBb Tn139JDHGjpXlKrMKwsB8uiPp X-Received: by 2002:a1c:a552:: with SMTP id o79mr1074624wme.170.1632775541664; Mon, 27 Sep 2021 13:45:41 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxKEMNt92BGbVGYI5r1wEmrDVxXlyGPFZ1tToLeSujUndYhXBh9fSeCg0QN1nPPYbzj7Wuqig== X-Received: by 2002:a1c:a552:: with SMTP id o79mr1074611wme.170.1632775541475; Mon, 27 Sep 2021 13:45:41 -0700 (PDT) Received: from [192.168.3.132] (p5b0c654d.dip0.t-ipconnect.de. [91.12.101.77]) by smtp.gmail.com with ESMTPSA id v18sm501361wml.44.2021.09.27.13.45.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Sep 2021 13:45:40 -0700 (PDT) Subject: Re: Struct page proposal To: Linus Torvalds , Kent Overstreet Cc: Vlastimil Babka , linux-fsdevel , Linux Kernel Mailing List , Linux-MM , Johannes Weiner , Matthew Wilcox , Andrew Morton , "Darrick J. Wong" , Christoph Hellwig , David Howells References: From: David Hildenbrand Organization: Red Hat Message-ID: <9e3b16f6-bb54-5bcc-1664-2ecb61424018@redhat.com> Date: Mon, 27 Sep 2021 22:45:39 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 27.09.21 20:34, Linus Torvalds wrote: > On Mon, Sep 27, 2021 at 10:54 AM Kent Overstreet > wrote: >> >> That list_head is the problematic one. Why do we need to be able to take a page >> from the middle of a freelist? > > At least for the merging with the buddy page case. And alloc_contig_range(), page reporting, page poisioning ... and probably more. -- Thanks, David / dhildenb