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=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 7A9C8C4363A for ; Tue, 27 Oct 2020 02:54:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B3EA2151B for ; Tue, 27 Oct 2020 02:54:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=bytedance-com.20150623.gappssmtp.com header.i=@bytedance-com.20150623.gappssmtp.com header.b="2MAHbHx0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2408253AbgJ0Cy4 (ORCPT ); Mon, 26 Oct 2020 22:54:56 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:41483 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389238AbgJ0Cyz (ORCPT ); Mon, 26 Oct 2020 22:54:55 -0400 Received: by mail-pg1-f195.google.com with SMTP id g12so6395733pgm.8 for ; Mon, 26 Oct 2020 19:54:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=QZF0W4dH550EVE0uGKIEMc2tMXwcFBBpVdPSQqA2FHM=; b=2MAHbHx0ohuPXh5dfEpWBJ1Wo1XpSybr0ZIK4nZml41vCIF1vUACcWxDhu7y1Ip5o3 m0rAzVo+jdRzscmsBgtSK5F2nx6US1AxlWhQAtnUMWANCNouKFShn7mkLrXt07PIt+29 Ae5VD9TY9vxoo8dkcC9NTOiEL8Jr88c0iFX8/xL9Pn+lGm23m5Rz1+DzuC8XTfFkVtKJ 6fUnFqiZ1EIcmk31nj/CL5qhZHrS0vi1keWT7Yy464+gAY9EObA83xx5sJFakBU8kQHf 18UOHryCI9Z/tLR3iV4lE1PlMYz1Txi+ifXGpBBrSLRLHYt0eNPb+u2WnrovgJpikVhS 0R+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=QZF0W4dH550EVE0uGKIEMc2tMXwcFBBpVdPSQqA2FHM=; b=FhPGjT5bEpn7glTI64KRa0ALeRDik9FDrgmEHJXXqBx0MP+HYp2EnFSEuaXiuckB2Y igHpbAZGlN8JrmOQV8GEH684nTlljffVqhRaKVwLDmuiBCtzUiNIQ+c3QwedS+Fi6QnC 61boq61CvkWCjWKc+bzLdO5u63M/J9jN3NYAxoODrKjLMggMNlHCORDTlrba6ai79XtQ bhOH+AxDhxRWdTLVC0LtqFU9hqDFrWC937nJO6SbVo+q7D7OHSZp6PFGPYOwUddE3IDh VlaZIy41Ctx4U0rc4hpm3kXqS/2VKG5u/7ztl1yhSnME85y5OpoBcEc3SSNERijR89RE hlDQ== X-Gm-Message-State: AOAM532+NGsK484R51lCWRDK+8bmGE5WYnPiTjfcQ9/bv3nuPCwokWA/ 3ihpwwWtQlN1/3U4RTQJQwlnD86EQMcyhqWushciog== X-Google-Smtp-Source: ABdhPJyUXYA2QbO5JVQ8aPVZ/qUZFKpo5APz2TO+UBNlY/I1gMKpDxJkGfjqKKIr9iRX+x23PthAvtxpgrmzfwJVtsM= X-Received: by 2002:a63:c851:: with SMTP id l17mr21924pgi.31.1603767295050; Mon, 26 Oct 2020 19:54:55 -0700 (PDT) MIME-Version: 1.0 References: <20201026145114.59424-1-songmuchun@bytedance.com> <20201026155351.GS20115@casper.infradead.org> In-Reply-To: <20201026155351.GS20115@casper.infradead.org> From: Muchun Song Date: Tue, 27 Oct 2020 10:54:18 +0800 Message-ID: Subject: Re: [External] Re: [PATCH v2 00/19] Free some vmemmap pages of hugetlb page To: Matthew Wilcox Cc: Jonathan Corbet , Mike Kravetz , Thomas Gleixner , mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, Peter Zijlstra , viro@zeniv.linux.org.uk, Andrew Morton , paulmck@kernel.org, mchehab+huawei@kernel.org, pawan.kumar.gupta@linux.intel.com, Randy Dunlap , oneukum@suse.com, anshuman.khandual@arm.com, jroedel@suse.de, Mina Almasry , David Rientjes , Xiongchun duan , linux-doc@vger.kernel.org, LKML , Linux Memory Management List , linux-fsdevel Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Mon, Oct 26, 2020 at 11:53 PM Matthew Wilcox wrote: > > On Mon, Oct 26, 2020 at 10:50:55PM +0800, Muchun Song wrote: > > For tail pages, the value of compound_dtor is the same. So we can reuse > > compound_dtor is only set on the first tail page. compound_head is > what you mean here, I think. > Yes, that's right. Sorry for the confusion. Thanks. -- Yours, Muchun