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 3979CC7EE29 for ; Fri, 2 Jun 2023 12:15:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235799AbjFBMPI (ORCPT ); Fri, 2 Jun 2023 08:15:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55348 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235019AbjFBMPG (ORCPT ); Fri, 2 Jun 2023 08:15:06 -0400 Received: from mail-qk1-x736.google.com (mail-qk1-x736.google.com [IPv6:2607:f8b0:4864:20::736]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1D2C123 for ; Fri, 2 Jun 2023 05:15:05 -0700 (PDT) Received: by mail-qk1-x736.google.com with SMTP id af79cd13be357-75affb4d0f9so192113585a.2 for ; Fri, 02 Jun 2023 05:15:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1685708105; x=1688300105; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=E6fUqXWlJ7lOi6jGaXDr+3k1lI6v7YmcWJa5TzCsAfQ=; b=djzFovwDfDw/YWbNLlEkijaHy+/emg+qoFOhQt066k8y7eW0hTlMePfrnYmuQ/TT6l d70TUlIzOVtlyaZIA/kRvBZRW52TVi/fieL9Uv4tiaV3F1pWuXYr7FBQh9RfbRxnphIn nIOOpE05COs4CBgwbOrTscQAp+nS6Tk8Iv2UDHWeAHyeCW+fEyc3ctU7cgeLL3sBwLok ifN7Ap+HhdKODLWUosw9jkC+w1v/s/a6CGlG9Me6OF17ZaxzMYB4I1oIF5wWR3fHyTGr 08q6Rpe08Gpj6mZ/RNU2DbMTQT+rS4iJPNpmpLyZGzEJB5e0jQtm57AIXlZP3QoFdL6G nNRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685708105; x=1688300105; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=E6fUqXWlJ7lOi6jGaXDr+3k1lI6v7YmcWJa5TzCsAfQ=; b=Ar/YxIwFNJlwpqNqpw1lx+3PDeQDoVjsnGe3vDRaqurlbw71kzd+2wGdLgniqMx9X3 lVJfosF0jBSckXWpPy3ITGF/m0cYDmlgH9DxvtsqiSW3F4Y2SWcHgG27Oq1FU0NQYKL/ zYPzU7f9wkf1z4LorB87TgqsEJpfRa3CG4OfCOWYljML353US9dF5eBkiMRUmyWlhL00 Re1l3ee8FoGXEMs2wMviQu1497MoLLlpiDYg8REcR1ZKiNORQGxOslvRbIRnCiNL5ImX +gEFelIClRCg0Br4AR9N/8C/BjIEcVRM7s478ISPqKlWvcaQmwIdvWNmsxIM/xpQ7KPF Db6A== X-Gm-Message-State: AC+VfDzPrCjxyop2Q4fxee2MdT9d7kT5RKCg3qGh+/p24uJ3XcV6uqp3 N1V7z8S2/WW8WYqIPkP+jXAk2Q== X-Google-Smtp-Source: ACHHUZ6mKX5TGzVXplRRXyH/OZZR/wmHkSAtgpVVJf05zVAhB435FtzWVMzs8VPH+7iFQ08B9IrtzA== X-Received: by 2002:a05:620a:4481:b0:75b:23a0:e7cc with SMTP id x1-20020a05620a448100b0075b23a0e7ccmr17244216qkp.45.1685708104769; Fri, 02 Jun 2023 05:15:04 -0700 (PDT) Received: from ziepe.ca ([206.223.160.26]) by smtp.gmail.com with ESMTPSA id p18-20020ae9f312000000b0075cad1e5907sm581918qkg.7.2023.06.02.05.15.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Jun 2023 05:15:04 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1q53gM-001uE9-W9; Fri, 02 Jun 2023 09:15:03 -0300 Date: Fri, 2 Jun 2023 09:15:02 -0300 From: Jason Gunthorpe To: Hugh Dickins Cc: Andrew Morton , Mike Kravetz , Mike Rapoport , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Suren Baghdasaryan , Qi Zheng , Yang Shi , Mel Gorman , Peter Xu , Peter Zijlstra , Will Deacon , Yu Zhao , Alistair Popple , Ralph Campbell , Ira Weiny , Steven Price , SeongJae Park , Naoya Horiguchi , Christophe Leroy , Zack Rusin , Axel Rasmussen , Anshuman Khandual , Pasha Tatashin , Miaohe Lin , Minchan Kim , Christoph Hellwig , Song Liu , Thomas Hellstrom , Russell King , "David S. Miller" , Michael Ellerman , "Aneesh Kumar K.V" , Heiko Carstens , Christian Borntraeger , Claudio Imbrenda , Alexander Gordeev , Jann Horn , linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 08/12] mm/pgtable: add pte_free_defer() for pgtable as page Message-ID: References: <35e983f5-7ed3-b310-d949-9ae8b130cdab@google.com> <739964d-c535-4db4-90ec-2166285b4d47@google.com> 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-s390@vger.kernel.org On Thu, Jun 01, 2023 at 11:03:11PM -0700, Hugh Dickins wrote: > > I was hoping Mathew's folio conversion would help clarify this.. > > I doubt that: what we have for use today is pages, however they are > dressed up. I mean the part where Matthew is going and splitting the types and making it much clearer and type safe how the memory is layed out. eg no more guessing if the arch code is overlaying something else onto the rcu_head. Then the hope against hope is that after doing all this we can find enough space for everything including the rcu heads.. Jason 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CA6FDC7EE29 for ; Fri, 2 Jun 2023 12:16:02 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4QXhmd055Kz3f0r for ; Fri, 2 Jun 2023 22:16:01 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=ziepe.ca header.i=@ziepe.ca header.a=rsa-sha256 header.s=google header.b=djzFovwD; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=ziepe.ca (client-ip=2607:f8b0:4864:20::732; helo=mail-qk1-x732.google.com; envelope-from=jgg@ziepe.ca; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=ziepe.ca header.i=@ziepe.ca header.a=rsa-sha256 header.s=google header.b=djzFovwD; dkim-atps=neutral Received: from mail-qk1-x732.google.com (mail-qk1-x732.google.com [IPv6:2607:f8b0:4864:20::732]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4QXhlf517cz3dxX for ; Fri, 2 Jun 2023 22:15:08 +1000 (AEST) Received: by mail-qk1-x732.google.com with SMTP id af79cd13be357-75b0b5c9eb8so192941085a.1 for ; Fri, 02 Jun 2023 05:15:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1685708105; x=1688300105; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=E6fUqXWlJ7lOi6jGaXDr+3k1lI6v7YmcWJa5TzCsAfQ=; b=djzFovwDfDw/YWbNLlEkijaHy+/emg+qoFOhQt066k8y7eW0hTlMePfrnYmuQ/TT6l d70TUlIzOVtlyaZIA/kRvBZRW52TVi/fieL9Uv4tiaV3F1pWuXYr7FBQh9RfbRxnphIn nIOOpE05COs4CBgwbOrTscQAp+nS6Tk8Iv2UDHWeAHyeCW+fEyc3ctU7cgeLL3sBwLok ifN7Ap+HhdKODLWUosw9jkC+w1v/s/a6CGlG9Me6OF17ZaxzMYB4I1oIF5wWR3fHyTGr 08q6Rpe08Gpj6mZ/RNU2DbMTQT+rS4iJPNpmpLyZGzEJB5e0jQtm57AIXlZP3QoFdL6G nNRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685708105; x=1688300105; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=E6fUqXWlJ7lOi6jGaXDr+3k1lI6v7YmcWJa5TzCsAfQ=; b=DbHMt5TJfpzO9+Iv7bnM7qDquxyj69+i/wZMbnYuz+oOzQDhNYUlis3Gx8a0Kr6MJf QhBAt2B7i4cOahtgIgHPuxiklNiaOAC/EaOXgDoJshWLffwtCLkjcyge+yaMjNyDQP+R tVC6oEx7uoizh1BZT/5CqboFvnxGjn2XF7PrdJjnVZyXUwz33E7djowqa/xyEsswBHys 4H+TUfnfoe3w0YZze+z5QSBvZ/f+76GU3rFqSOcrf1tbT/SFN2h1uQJntLqmT7F96JtB 0ZoqaCctyTONXTLINfANp/BCWF1/2iuCKEyOMMSaSojL9+aerogmvC1yRrPcN0DXb7RE IqgQ== X-Gm-Message-State: AC+VfDxKcZ8Cq1T+ZTKcspquimmMWOTAIB2/koNl5pUqWbMS/3qYEqBJ OHV4f4n8wdmE3RZpQ+I0JLN+fQ== X-Google-Smtp-Source: ACHHUZ6mKX5TGzVXplRRXyH/OZZR/wmHkSAtgpVVJf05zVAhB435FtzWVMzs8VPH+7iFQ08B9IrtzA== X-Received: by 2002:a05:620a:4481:b0:75b:23a0:e7cc with SMTP id x1-20020a05620a448100b0075b23a0e7ccmr17244216qkp.45.1685708104769; Fri, 02 Jun 2023 05:15:04 -0700 (PDT) Received: from ziepe.ca ([206.223.160.26]) by smtp.gmail.com with ESMTPSA id p18-20020ae9f312000000b0075cad1e5907sm581918qkg.7.2023.06.02.05.15.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Jun 2023 05:15:04 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1q53gM-001uE9-W9; Fri, 02 Jun 2023 09:15:03 -0300 Date: Fri, 2 Jun 2023 09:15:02 -0300 From: Jason Gunthorpe To: Hugh Dickins Subject: Re: [PATCH 08/12] mm/pgtable: add pte_free_defer() for pgtable as page Message-ID: References: <35e983f5-7ed3-b310-d949-9ae8b130cdab@google.com> <739964d-c535-4db4-90ec-2166285b4d47@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Miaohe Lin , David Hildenbrand , Peter Zijlstra , Yang Shi , Peter Xu , Song Liu , sparclinux@vger.kernel.org, Alexander Gordeev , Claudio Imbrenda , Will Deacon , linux-s390@vger.kernel.org, Yu Zhao , Ira Weiny , Alistair Popple , Russell King , Matthew Wilcox , Steven Price , Christoph Hellwig , "Aneesh Kumar K.V" , Axel Rasmussen , Christian Borntraeger , Thomas Hellstrom , Ralph Campbell , Pasha Tatashin , Anshuman Khandual , Heiko Carstens , Qi Z heng , Suren Baghdasaryan , linux-arm-kernel@lists.infradead.org, SeongJae Park , Jann Horn , linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, "Kirill A. Shutemov" , Naoya Horiguchi , linux-kernel@vger.kernel.org, Minchan Kim , Mike Rapoport , Andrew Morton , Mel Gorman , "David S. Miller" , Zack Rusin , Mike Kravetz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Jun 01, 2023 at 11:03:11PM -0700, Hugh Dickins wrote: > > I was hoping Mathew's folio conversion would help clarify this.. > > I doubt that: what we have for use today is pages, however they are > dressed up. I mean the part where Matthew is going and splitting the types and making it much clearer and type safe how the memory is layed out. eg no more guessing if the arch code is overlaying something else onto the rcu_head. Then the hope against hope is that after doing all this we can find enough space for everything including the rcu heads.. Jason 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1BA0CC7EE2E for ; Fri, 2 Jun 2023 12:15:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=1R3ieB2TpvLvcPSpM/n5uE2kahLPej2fNyMHMYXnIbk=; b=rJ0zZD8JXHUHx2 ZGxQHYrKfh4Mop0AJTd+bnoAuStVbEI4e2NRT8nBkEqjeBJnypFouYKuE6S/dQCNMOaO9agbdaH4Y jAVaSwtohD807Jjtf1dXjK1QjyHt8ih2peBPDISBX++EQqmhNwSr/fxMtw4q7DvBYqrT4TnNa4ab+ TOLVoAZ+O0qFfnXdZ/zg4bx/DF+BQTSXJecxTkq3Kozu9TxftrPLliRh1ogITXJwe352jyC0mtemN ijr3hb/rolAGqi8GY8MmXz299tNnzepfjfwAjvY/hlxTUu4aTsq6SueS+YdXopPU9aPOzmz2FyuwX KGqLwPL1ZuZxZpKVq7FQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q53gU-006rUb-28; Fri, 02 Jun 2023 12:15:10 +0000 Received: from mail-qk1-x72f.google.com ([2607:f8b0:4864:20::72f]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q53gR-006rSH-2p for linux-arm-kernel@lists.infradead.org; Fri, 02 Jun 2023 12:15:09 +0000 Received: by mail-qk1-x72f.google.com with SMTP id af79cd13be357-75b0b5c9eb8so192940785a.1 for ; Fri, 02 Jun 2023 05:15:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1685708105; x=1688300105; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=E6fUqXWlJ7lOi6jGaXDr+3k1lI6v7YmcWJa5TzCsAfQ=; b=djzFovwDfDw/YWbNLlEkijaHy+/emg+qoFOhQt066k8y7eW0hTlMePfrnYmuQ/TT6l d70TUlIzOVtlyaZIA/kRvBZRW52TVi/fieL9Uv4tiaV3F1pWuXYr7FBQh9RfbRxnphIn nIOOpE05COs4CBgwbOrTscQAp+nS6Tk8Iv2UDHWeAHyeCW+fEyc3ctU7cgeLL3sBwLok ifN7Ap+HhdKODLWUosw9jkC+w1v/s/a6CGlG9Me6OF17ZaxzMYB4I1oIF5wWR3fHyTGr 08q6Rpe08Gpj6mZ/RNU2DbMTQT+rS4iJPNpmpLyZGzEJB5e0jQtm57AIXlZP3QoFdL6G nNRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685708105; x=1688300105; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=E6fUqXWlJ7lOi6jGaXDr+3k1lI6v7YmcWJa5TzCsAfQ=; b=eolluKazU4ZTgenXs+EuKogkB4PX1p072nc9uHGnLZ3Jc3sphLIefqftr06GcrdBK9 f2ywwGHd0xBp4U5OTePLZMRqDI0pDQoHsss+0GIvZk3QBOOVbFXEle6kp4TCVVVQWx3P 0k6IbE/d20KvYebvY9cn2Nx4B1WKQgcK8n7ddJjloGP/dadoEV6N7IvpYXj6punmsc+c g09c53ABAIA6kOCNwmAe/3t0T+wrIPAJXWqzBdtdiZPQrVruh90Td36vH3QiAgVf2bQY TAGGQMbVOj16GYFdfkn5d45EQFqKZWWykeq0ISMFUP1INoDCX/gzVCazRPdJq0SqHIbV uiIg== X-Gm-Message-State: AC+VfDzCV2Zs019aEsYA3zxiqeSknRmryvhAjbJCts0NB2neETgHqOyS JhR/Uxq2G/du+t7c5UL0Sw+jCg== X-Google-Smtp-Source: ACHHUZ6mKX5TGzVXplRRXyH/OZZR/wmHkSAtgpVVJf05zVAhB435FtzWVMzs8VPH+7iFQ08B9IrtzA== X-Received: by 2002:a05:620a:4481:b0:75b:23a0:e7cc with SMTP id x1-20020a05620a448100b0075b23a0e7ccmr17244216qkp.45.1685708104769; Fri, 02 Jun 2023 05:15:04 -0700 (PDT) Received: from ziepe.ca ([206.223.160.26]) by smtp.gmail.com with ESMTPSA id p18-20020ae9f312000000b0075cad1e5907sm581918qkg.7.2023.06.02.05.15.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Jun 2023 05:15:04 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1q53gM-001uE9-W9; Fri, 02 Jun 2023 09:15:03 -0300 Date: Fri, 2 Jun 2023 09:15:02 -0300 From: Jason Gunthorpe To: Hugh Dickins Cc: Andrew Morton , Mike Kravetz , Mike Rapoport , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Suren Baghdasaryan , Qi Zheng , Yang Shi , Mel Gorman , Peter Xu , Peter Zijlstra , Will Deacon , Yu Zhao , Alistair Popple , Ralph Campbell , Ira Weiny , Steven Price , SeongJae Park , Naoya Horiguchi , Christophe Leroy , Zack Rusin , Axel Rasmussen , Anshuman Khandual , Pasha Tatashin , Miaohe Lin , Minchan Kim , Christoph Hellwig , Song Liu , Thomas Hellstrom , Russell King , "David S. Miller" , Michael Ellerman , "Aneesh Kumar K.V" , Heiko Carstens , Christian Borntraeger , Claudio Imbrenda , Alexander Gordeev , Jann Horn , linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 08/12] mm/pgtable: add pte_free_defer() for pgtable as page Message-ID: References: <35e983f5-7ed3-b310-d949-9ae8b130cdab@google.com> <739964d-c535-4db4-90ec-2166285b4d47@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230602_051507_915398_62D92478 X-CRM114-Status: GOOD ( 13.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jun 01, 2023 at 11:03:11PM -0700, Hugh Dickins wrote: > > I was hoping Mathew's folio conversion would help clarify this.. > > I doubt that: what we have for use today is pages, however they are > dressed up. I mean the part where Matthew is going and splitting the types and making it much clearer and type safe how the memory is layed out. eg no more guessing if the arch code is overlaying something else onto the rcu_head. Then the hope against hope is that after doing all this we can find enough space for everything including the rcu heads.. Jason _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel