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 D8295C433EF for ; Mon, 27 Sep 2021 18:35:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5C52760F6D for ; Mon, 27 Sep 2021 18:35:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 5C52760F6D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id EB9C1900002; Mon, 27 Sep 2021 14:35:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E690F6B0071; Mon, 27 Sep 2021 14:35:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D5975900002; Mon, 27 Sep 2021 14:35:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0213.hostedemail.com [216.40.44.213]) by kanga.kvack.org (Postfix) with ESMTP id C9B7F6B006C for ; Mon, 27 Sep 2021 14:35:16 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 78869348D0 for ; Mon, 27 Sep 2021 18:35:16 +0000 (UTC) X-FDA: 78634205832.17.6658D1A Received: from mail-lf1-f47.google.com (mail-lf1-f47.google.com [209.85.167.47]) by imf19.hostedemail.com (Postfix) with ESMTP id 39AF5B0000AC for ; Mon, 27 Sep 2021 18:35:16 +0000 (UTC) Received: by mail-lf1-f47.google.com with SMTP id x27so81592850lfu.5 for ; Mon, 27 Sep 2021 11:35:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=+jIsaeZxB9iIHx2Xlr4ffwG7DDOBE7KZeGUWD2K48eI=; b=DGnGiVsWgNqibsS1Ab5nKqt7YSbGTS5Tcr0kHz7SyALq+hN2DJXB66SHS6HvDYU2RC wX6Jz58IJLYRva+k9kqC0ZdmYbOQu/f6gkWyrVI5GZXHj+f/rVDt+ctTpvanz5gi9wji /kiqtD3eiPtfH8Ab50k3VlieyRneSVxG+cw9U= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=+jIsaeZxB9iIHx2Xlr4ffwG7DDOBE7KZeGUWD2K48eI=; b=DStH7rR1DBnI3v2jdYv4y7LJyIBmn9LmrTnZ9IxMbjr/Iu/oZ9p0Wrnaglb5QH8J7s 3hVCDxr+umzJvlXONLNiaASZMugXVLb9fFuCeIXghGoRdhYyVcs2kJabdvdWJrXOBwPY +W32jQnmtUBBKhsujON4k2KCt1HFUc3H9ljItZaVRBFLp15ZgSl12re0Tw8YIEA4deIB kUoEZQ3sE+gWbmNXLDGTEy7W38jYjgzKkhlHwFfzKXl0xGggwgjE9LuDnGS969ncAkse IsTaXxTWWesJgY4Vkw2mL6BkPJFjNd2iCeuKU8LeTgAxPn6LiTcC2FYSg95GJNl2JWq+ Fu7A== X-Gm-Message-State: AOAM531zQr3aPnakBWH+cnsydUEYzh8NYpIHlODBQqh4pbxouBtSlsNX hdgfLwEZAiIR1x7Os+k1AUd4wqTYDsQTJOMKvoA= X-Google-Smtp-Source: ABdhPJyQ5roNgsOLQ1c1oSCe8vxsjXbWqdyaCiWd+6UIwVjhN2VVh9JcXJRZ+G7pfC6Rbf303UPJqA== X-Received: by 2002:a05:6512:22c3:: with SMTP id g3mr1284435lfu.440.1632767714384; Mon, 27 Sep 2021 11:35:14 -0700 (PDT) Received: from mail-lf1-f48.google.com (mail-lf1-f48.google.com. [209.85.167.48]) by smtp.gmail.com with ESMTPSA id x7sm1678203lfr.109.2021.09.27.11.35.11 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Sep 2021 11:35:12 -0700 (PDT) Received: by mail-lf1-f48.google.com with SMTP id y28so81057310lfb.0 for ; Mon, 27 Sep 2021 11:35:11 -0700 (PDT) X-Received: by 2002:a2e:bc1e:: with SMTP id b30mr1347010ljf.191.1632767710543; Mon, 27 Sep 2021 11:35:10 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Linus Torvalds Date: Mon, 27 Sep 2021 11:34:54 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: Struct page proposal To: 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 Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 39AF5B0000AC X-Stat-Signature: 18j65kogfxx1opsn6zkqz7x65xohbyus Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=google header.b=DGnGiVsW; dmarc=none; spf=pass (imf19.hostedemail.com: domain of torvalds@linuxfoundation.org designates 209.85.167.47 as permitted sender) smtp.mailfrom=torvalds@linuxfoundation.org X-HE-Tag: 1632767716-896808 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: 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. Linus