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 675DAC433F5 for ; Tue, 5 Oct 2021 19:57:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F9406126A for ; Tue, 5 Oct 2021 19:57:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235654AbhJET7r (ORCPT ); Tue, 5 Oct 2021 15:59:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235572AbhJET7n (ORCPT ); Tue, 5 Oct 2021 15:59:43 -0400 Received: from mail-qv1-xf2a.google.com (mail-qv1-xf2a.google.com [IPv6:2607:f8b0:4864:20::f2a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88F8CC06174E for ; Tue, 5 Oct 2021 12:57:52 -0700 (PDT) Received: by mail-qv1-xf2a.google.com with SMTP id z3so414867qvl.9 for ; Tue, 05 Oct 2021 12:57:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=8ZsMAGNTayv2iBn8EXiHZZPaHMkYLBgsl5jLImI14h0=; b=oh+Odu40d838WzNq/zvm7zb8DZUKDR9CSey+zO0RLrl3v/ly4FG2gn3EgmDLCT8OYs bfOkYNHQ7Xd8DtMLikbPn1SX1Ptfis5iywRMiA0hwGaCv1HDoFkUDW5GzoW1hFDNWiuO rMPSijwUaPaT2tQL9WD8mn6FoAXjHNrwU1RvUbuuL8uaHMAKWvkPJwR5Hu85wR/+w13z riRu+g2xZP88AyiO+q81CGqZiYVPTroq64qmJLkb3TZ4YMWmxaK64uu3q6m7QBjeVb1h chb9nRkfGu0r6ARwha9mJ5WpZqNnTS83YlLxnrbieIU6K5FaFiuebUWlNSsiwFgA7zM3 32Ww== 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=8ZsMAGNTayv2iBn8EXiHZZPaHMkYLBgsl5jLImI14h0=; b=uKa0j1JjB9WBMUDulUGrCB/vHjo5LbGapxYiJFMmka+EmbIKJVa6Pp8907OjrJOnXP Qlfx9+nZhCsJMA0dX1bFmqLqfn+47+peyCXSQmWuCAR0hj8CQ2wciBehW3XmNSpUCFOW vRj1+HL3UII/CU8Q1YrFOWC0Srh5ogUVcoCr22pcvceiNgnOlOLo4VKdzJGikTkgk7JF iWfVNDUfcRahKTf0nMwDFCjikvwDaa7vnCIniAyApBsHkj1l+ROjUsJDxPe9k2Q6Z4ij T4qXpMzOBRs4R2+xYmmk5j5QnUAPIvk3FHdpg5awGQstTWU2CQsx+OYujOz2IaxPhtjD +Qiw== X-Gm-Message-State: AOAM533hGV6VIGpxMoJD2RlU+8FkFVGj40UT90s/fVcCioDR/5+/wm7/ GwuOYMihxWa/iIvNNBg7UpA1RA== X-Google-Smtp-Source: ABdhPJy2LAecQlkA5PqstBXPQYwI9yj/XHyCEnz69vrtX3R59Wivgq5kn6JOJ0gIxOpEUZcXP4U2/g== X-Received: by 2002:a05:6214:5b1:: with SMTP id by17mr27353744qvb.18.1633463871763; Tue, 05 Oct 2021 12:57:51 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-142-162-113-129.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.162.113.129]) by smtp.gmail.com with ESMTPSA id z19sm10946484qts.96.2021.10.05.12.56.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 12:56:51 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1mXqXi-00BIG6-O4; Tue, 05 Oct 2021 16:56:02 -0300 Date: Tue, 5 Oct 2021 16:56:02 -0300 From: Jason Gunthorpe To: Matthew Wilcox Cc: Johannes Weiner , Linus Torvalds , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Morton Subject: Re: [GIT PULL] Memory folios for v5.15 Message-ID: <20211005195602.GA2688930@ziepe.ca> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 05, 2021 at 07:30:06PM +0100, Matthew Wilcox wrote: > Outside of core MM developers, I'm not sure that a lot of people > know that a struct page might represent 2^n pages of memory. Even > architecture maintainers seem to be pretty fuzzy on what > flush_dcache_page() does for compound pages: > https://lore.kernel.org/linux-arch/20200818150736.GQ17456@casper.infradead.org/ I definitely second that opinion A final outcome where we still have struct page refering to all kinds of different things feels like a missed opportunity to me. Jason