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 0EB05C433EF for ; Tue, 14 Dec 2021 14:25:15 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7515F6B0071; Tue, 14 Dec 2021 09:25:04 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 700D16B0073; Tue, 14 Dec 2021 09:25:04 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5C9096B0074; Tue, 14 Dec 2021 09:25:04 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0119.hostedemail.com [216.40.44.119]) by kanga.kvack.org (Postfix) with ESMTP id 4F44F6B0071 for ; Tue, 14 Dec 2021 09:25:04 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 0894B180A7315 for ; Tue, 14 Dec 2021 14:24:54 +0000 (UTC) X-FDA: 78916621308.14.1CBEC90 Received: from mail-qk1-f177.google.com (mail-qk1-f177.google.com [209.85.222.177]) by imf17.hostedemail.com (Postfix) with ESMTP id 135EE40014 for ; Tue, 14 Dec 2021 14:24:47 +0000 (UTC) Received: by mail-qk1-f177.google.com with SMTP id m192so16851092qke.2 for ; Tue, 14 Dec 2021 06:24:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=6ZhNyxZ+/TQ4WsAmdsb0cRpOF/CcnnWOZZylVjAI/M8=; b=ifOZJ8qK1boo4M0TOXjc2YRoL/2yBNK5mhlaCojsjw1q7pStrJjH+ViMSwdmeX8XJ5 JUBQ8cRg7icQa7IB3j7e7C7MEFhQy9OZl8bCrbhcsRedL8P62lPdxR3/xkihXfDLrAXS sSi2fC3QSdt+eNSupe2M9T1oHxidgI0QOUkhZRfly6hDfjGkU9PPegka8UBWE3jORsMf RgEGxhrWLy15rUOSXDgc00IvgZf4gx0fZBvxlydUDaQQ2rWt3ffu44L9OKFePfsz0n5l cj9jecu9s72/ZjOb8clr+DHwYlYa0yUVoH4oK+7H4IkeXCeWfuMzzLbGOwlVaT1gAVtZ A3FA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=6ZhNyxZ+/TQ4WsAmdsb0cRpOF/CcnnWOZZylVjAI/M8=; b=appqqrtuMAy/jy2z5Hz2JnYp2WXkCf3gbEddI5ZV/AI3UEf/ORXf6uZJgYgtOoTNDv iXBab1JbL7yDoEvGARKwk/0VCVOdjUzrmbSMIqNSs2+4cznpE1t+O7h3o1cR1Hw/Q9JC hiTe9Y3mGSH9yQgtOQHGtLPIkuuX8loXnesPofoxDKDvRIxNy3QFNT4GpPxVa8dnJXrA 869OaFbY2HDR5ugl3pgnNnfco/CyPufHGbZl3xjRviecDrm6eJueU0nKuyXBJ4+C3KvS KoXLrj5HKxpl3rpXMXpQWTeoJjNoaQGsv81YrMuveZ7zKals1QWQ3I9xAPr6tJK/LVAZ Bg/w== X-Gm-Message-State: AOAM531X1m1fkGVGxl35Z2ukq1KKnorri/sP6D0fwv1Yg3KqWD1yauyq zQ+1EgNhd5nDeeQdlu8bjxE+XQ== X-Google-Smtp-Source: ABdhPJzqKvPZa20V6sdeC2p3P4Ju0XqUP6Ryi/y06fYLAn/YKFN/FEshhCfjTnXVve6veolOkGyUug== X-Received: by 2002:a37:747:: with SMTP id 68mr4249578qkh.227.1639491892557; Tue, 14 Dec 2021 06:24:52 -0800 (PST) Received: from localhost ([2620:10d:c091:480::1:e1e4]) by smtp.gmail.com with ESMTPSA id x1sm32689qtj.9.2021.12.14.06.24.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Dec 2021 06:24:52 -0800 (PST) Date: Tue, 14 Dec 2021 15:24:49 +0100 From: Johannes Weiner To: Vlastimil Babka Cc: Matthew Wilcox , Christoph Lameter , David Rientjes , Joonsoo Kim , Pekka Enberg , linux-mm@kvack.org, Andrew Morton , patches@lists.linux.dev Subject: Re: [PATCH v2 04/33] mm: Split slab into its own type Message-ID: References: <20211201181510.18784-1-vbabka@suse.cz> <20211201181510.18784-5-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211201181510.18784-5-vbabka@suse.cz> Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=cmpxchg-org.20210112.gappssmtp.com header.s=20210112 header.b=ifOZJ8qK; spf=pass (imf17.hostedemail.com: domain of hannes@cmpxchg.org designates 209.85.222.177 as permitted sender) smtp.mailfrom=hannes@cmpxchg.org; dmarc=pass (policy=none) header.from=cmpxchg.org X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 135EE40014 X-Stat-Signature: pmdh1a3x94mfep8ufco1sfeoqi4eh1bp X-HE-Tag: 1639491887-292550 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 Wed, Dec 01, 2021 at 07:14:41PM +0100, Vlastimil Babka wrote: > From: "Matthew Wilcox (Oracle)" > > Make struct slab independent of struct page. It still uses the > underlying memory in struct page for storing slab-specific data, > but slab and slub can now be weaned off using struct page directly. > Some of the wrapper functions (slab_address() and slab_order()) > still need to cast to struct folio, but this is a significant > disentanglement. > > [ vbabka@suse.cz: Rebase on folios, use folio instead of page where possible. > > Do not duplicate flags field in struct slab, instead make the related > accessors go through slab_folio(). For testing pfmemalloc use the > folio_*_active flag accessors directly so the PageSlabPfmemalloc wrappers can > be removed later. > > Make folio_slab() expect only folio_test_slab() == true folios and > virt_to_slab() return NULL when folio_test_slab() == false. > > Move struct slab to mm/slab.h. > > Don't represent with struct slab pages that are not true slab pages, but > just a compound page obtained directly rom page allocator (with large > kmalloc() for SLUB and SLOB). ] > > Signed-off-by: Matthew Wilcox (Oracle) > Signed-off-by: Vlastimil Babka Acked-by: Johannes Weiner