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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D5D48C43461 for ; Mon, 7 Sep 2020 12:29:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 95EF52075A for ; Mon, 7 Sep 2020 12:29:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=shutemov-name.20150623.gappssmtp.com header.i=@shutemov-name.20150623.gappssmtp.com header.b="Gt2BfRBe" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729005AbgIGM26 (ORCPT ); Mon, 7 Sep 2020 08:28:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729326AbgIGMW3 (ORCPT ); Mon, 7 Sep 2020 08:22:29 -0400 Received: from mail-lj1-x244.google.com (mail-lj1-x244.google.com [IPv6:2a00:1450:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32507C061573 for ; Mon, 7 Sep 2020 05:22:28 -0700 (PDT) Received: by mail-lj1-x244.google.com with SMTP id a15so15978952ljk.2 for ; Mon, 07 Sep 2020 05:22:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=OeimeRwYw15Dm5RC3eo69tmFfj1HBBCH+Ah5VSbh/Ao=; b=Gt2BfRBeLNDr0PblRAOYsE4HNTz4wKvTVDu7qg36r+FUseQBeVGogfyt7JJY3STT4j Fzy2fYx8DDhHvCXTmvsX7sj4xfCcgI+PcjmlG7+o/24nsuKPssEmxA5bWZw54Tp7mMA4 8TIyDN8lzrlk7WAwLmenIFX0LPFQPe39Ymg3eEAcnZlmRSVQ3Ks1S8ZTGKDiZgkptQLn LwpMRMVFFfFD5T1kqMWPqtQf2gPCzYEQcMCkFzdZVao9BqqmBpz0JMA6CXHYgX+4lIT6 NhgiUqjW9sCi5VH7Zw+xyKCHSs3ptiCTXv0qrdaz52vPmEubrEkjzqaDfxugUYBHfWbs s6gg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=OeimeRwYw15Dm5RC3eo69tmFfj1HBBCH+Ah5VSbh/Ao=; b=GFoM3pG9IF+f8pJq/ND2woJmztN1Zuv5geek6cLTHOMNiT74WkQ+XQUy476KiWoDm1 3tfTw5i7x13N++7Z2wuSC0syRZeDTFM77kPKzdoKvJBA6NX2bBhXozvZ/yS75clX32H1 H8FGHDYxuYzt8Ke8Ta6knobZJJFJLsDsy5xrjqHW/CmnzMxB2dE8W3fyoOmYVU/LEYfd aV48MHMIPVw7g4JLwP/VfoFTsxTbnnMqHDYKzVB3cfCMIJPSk+wbKCRBmLZviNnALwEh Y5PANFxihwKtRWqFfAlrdIQQF8cr0CW4xF/R/T4+URShx4V7CqAYtNx4GpC+SrkZGG9a shNA== X-Gm-Message-State: AOAM533MAqzk7GkgvoJhwpp3b4DGdDQPY1lt0azXdnfY5ao46kKBUIbC QuxjMg1U7pTxruEH5mfBA3JfwP7RnvyZjA== X-Google-Smtp-Source: ABdhPJzW0Pifwd6OEvOK71T48MQ3RPn7hLBhLx6SaBRHMIDZiRcdsyi7AiYq1feoD31R1T10xCd43A== X-Received: by 2002:a2e:7215:: with SMTP id n21mr10330338ljc.438.1599481344757; Mon, 07 Sep 2020 05:22:24 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id p4sm7235316lfr.68.2020.09.07.05.22.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2020 05:22:24 -0700 (PDT) Received: by box.localdomain (Postfix, from userid 1000) id 109A51034AA; Mon, 7 Sep 2020 15:22:28 +0300 (+03) Date: Mon, 7 Sep 2020 15:22:28 +0300 From: "Kirill A. Shutemov" To: Zi Yan Cc: linux-mm@kvack.org, Roman Gushchin , Rik van Riel , "Kirill A . Shutemov" , Matthew Wilcox , Shakeel Butt , Yang Shi , David Nellans , linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 01/16] mm: add pagechain container for storing multiple pages. Message-ID: <20200907122228.4zlyfysdul3s62me@box> References: <20200902180628.4052244-1-zi.yan@sent.com> <20200902180628.4052244-2-zi.yan@sent.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200902180628.4052244-2-zi.yan@sent.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 02, 2020 at 02:06:13PM -0400, Zi Yan wrote: > From: Zi Yan > > When depositing page table pages for 1GB THPs, we need 512 PTE pages + > 1 PMD page. Instead of counting and depositing 513 pages, we can use the > PMD page as a leader page and chain the rest 512 PTE pages with ->lru. > This, however, prevents us depositing PMD pages with ->lru, which is > currently used by depositing PTE pages for 2MB THPs. So add a new > pagechain container for PMD pages. > > Signed-off-by: Zi Yan Just deposit it to a linked list in the mm_struct as we do for PMD if split ptl disabled. -- Kirill A. Shutemov