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=-7.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 236DAC433E0 for ; Tue, 22 Dec 2020 11:58:16 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9EEEC224D4 for ; Tue, 22 Dec 2020 11:58:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9EEEC224D4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 3957586A01; Tue, 22 Dec 2020 11:58:15 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id U1AmA7SAw88w; Tue, 22 Dec 2020 11:58:13 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 02C26868AB; Tue, 22 Dec 2020 11:58:12 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id C06CAC1787; Tue, 22 Dec 2020 11:58:12 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 75F6AC0893 for ; Tue, 22 Dec 2020 11:58:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 59F3C869F0 for ; Tue, 22 Dec 2020 11:58:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lwBo4HnHs63Z for ; Tue, 22 Dec 2020 11:58:10 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by whitealder.osuosl.org (Postfix) with ESMTPS id 08BB0868AB for ; Tue, 22 Dec 2020 11:58:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1608638288; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=c2qf5gIhcMVQKS3hR+V8X3H/dCp3GvNlzpFYpp+NKNs=; b=KWsIq3ETq7JinqnJVkQF2kCdpiMoD5BIp96GJ43HAkL+cWDAG+lYdbpEp52rgDjcK2YezO Qce44mlBM6hqpOF3J5RDxI/v51Z6Qxmiizp3WVxQwYGAVDdDl0w5wgsgqt/RL0/JVKMqlL 952hUBnCyhyAdm3vK2Ws9pZUIGOLV7w= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-309-gXb2fMU9PgO7SaOF_AZm0g-1; Tue, 22 Dec 2020 06:58:04 -0500 X-MC-Unique: gXb2fMU9PgO7SaOF_AZm0g-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4B30F1084C89; Tue, 22 Dec 2020 11:58:02 +0000 (UTC) Received: from [10.36.113.220] (ovpn-113-220.ams2.redhat.com [10.36.113.220]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4FDC75E1B4; Tue, 22 Dec 2020 11:57:55 +0000 (UTC) Subject: Re: [RFC v2 PATCH 0/4] speed up page allocation for __GFP_ZERO To: Liang Li References: <20201221162519.GA22504@open-light-1.localdomain> <7bf0e895-52d6-9e2d-294b-980c33cf08e4@redhat.com> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: <840ff69d-20d5-970a-1635-298000196f3e@redhat.com> Date: Tue, 22 Dec 2020 12:57:54 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Cc: Andrea Arcangeli , Michal Hocko , "Michael S. Tsirkin" , Dan Williams , Liang Li , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Dave Hansen , Alexander Duyck , virtualization@lists.linux-foundation.org, Mel Gorman , Andrew Morton X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" PiAKPj4+Cj4+PiBWaXJ0dWxpemF0aW9uCj4+PiA9PT09PT09PT09PT09Cj4+PiBTcGVlZCB1cCBW TSBjcmVhdGlvbiBhbmQgc2hvcnRlbiBndWVzdCBib290IHRpbWUsIGVzcGVjaWFsbHkgZm9yIFBD SQo+Pj4gU1ItSU9WIGRldmljZSBwYXNzdGhyb3VnaCBzY2VuYXJpby4gQ29tcGFyZWQgd2l0aCBz b21lIG9mIHRoZSBwYXJhCj4+PiB2aXRhbGl6YXRpb24gc29sdXRpb25zLCBpdCBpcyBlYXN5IHRv IGRlcGxveSBiZWNhdXNlIGl04oCZcyB0cmFuc3BhcmVudAo+Pj4gdG8gZ3Vlc3QgYW5kIGNhbiBo YW5kbGUgRE1BIHByb3Blcmx5IGluIEJJT1Mgc3RhZ2UsIHdoaWxlIHRoZSBwYXJhCj4+PiB2aXJ0 dWFsaXphdGlvbiBzb2x1dGlvbiBjYW7igJl0IGhhbmRsZSBpdCB3ZWxsLgo+Pgo+PiBXaGF0IGlz IHRoZSAicGFyYSB2aXJ0dWFsaXphdGlvbiIgYXBwcm9hY2ggeW91IGFyZSB0YWxraW5nIGFib3V0 Pwo+IAo+IEkgcmVmZXIgdHdvIHRvcGljIGluIHRoZSBLVk0gZm9ydW0gMjAyMCwgdGhlIGRvYyBj YW4gZ2l2ZSBtb3JlIGRldGFpbHMgOgo+IGh0dHBzOi8vc3RhdGljLnNjaGVkLmNvbS9ob3N0ZWRf ZmlsZXMva3ZtZm9ydW0yMDIwLzQ4L2NvSU9NTVUucGRmCj4gaHR0cHM6Ly9zdGF0aWMuc2NoZWQu Y29tL2hvc3RlZF9maWxlcy9rdm1mb3J1bTIwMjAvNTEvVGhlJTIwUHJhY3RpY2UlMjBNZXRob2Ql MjB0byUyMFNwZWVkJTIwVXAlMjAxMHglMjBCb290LXVwJTIwVGltZSUyMGZvciUyMEd1ZXN0JTIw aW4lMjBBbGliYWJhJTIwQ2xvdWQucGRmCj4gCj4gYW5kIHRoZSBmbG93aW5nIGxpbmsgaXMgbWlu ZToKPiBodHRwczovL3N0YXRpYy5zY2hlZC5jb20vaG9zdGVkX2ZpbGVzL2t2bWZvcnVtMjAyMC85 MC9TcGVlZCUyMFVwJTIwQ3JlYXRpb24lMjBvZiUyMGElMjBWTSUyMFdpdGglMjBQYXNzdGhyb3Vn aCUyMEdQVS5wZGYKClRoYW5rcyBmb3IgdGhlIHBvaW50ZXJzISBJIGFjdHVhbGx5IGRpZCB3YXRj aCB5b3VyIHByZXNlbnRhdGlvbi4KCj4+Cj4+Pgo+Pj4gSW1wcm92ZSBndWVzdCBwZXJmb3JtYW5j ZSB3aGVuIHVzZSBWSVJUSU9fQkFMTE9PTl9GX1JFUE9SVElORyBmb3IgbWVtb3J5Cj4+PiBvdmVy Y29tbWl0LiBUaGUgVklSVElPX0JBTExPT05fRl9SRVBPUlRJTkcgZmVhdHVyZSB3aWxsIHJlcG9y dCBndWVzdCBwYWdlCj4+PiB0byB0aGUgVk1NLCBWTU0gd2lsbCB1bm1hcCB0aGUgY29ycmVzcG9u ZGluZyBob3N0IHBhZ2UgZm9yIHJlY2xhaW0sCj4+PiB3aGVuIGd1ZXN0IGFsbG9jYXRlIGEgcGFn ZSBqdXN0IHJlY2xhaW1lZCwgaG9zdCB3aWxsIGFsbG9jYXRlIGEgbmV3IHBhZ2UKPj4+IGFuZCB6 ZXJvIGl0IG91dCBmb3IgZ3Vlc3QsIGluIHRoaXMgY2FzZSBwcmUgemVybyBvdXQgZnJlZSBwYWdl IHdpbGwgaGVscAo+Pj4gdG8gc3BlZWQgdXAgdGhlIHByb2NjZXNzIG9mIGZhdWx0IGluIGFuZCBy ZWR1Y2UgdGhlIHBlcmZvcm1hbmNlIGltcGFjdGlvbi4KPj4KPj4gU3VjaCBmYXVsdHMgaW4gdGhl IFZNTSBhcmUgbm8gZGlmZmVyZW50IHRvIG90aGVyIGZhdWx0cywgd2hlbiBmaXJzdAo+PiBhY2Nl c3NpbmcgYSBwYWdlIHRvIGJlIHBvcHVsYXRlZC4gQWdhaW4sIEkgd29uZGVyIGhvdyBtdWNoIG9m IGEKPj4gZGlmZmVyZW5jZSBpdCBhY3R1YWxseSBtYWtlcy4KPj4KPiAKPiBJIGFtIG5vdCBqdXN0 IHJlZmVycmluZyB0byBmYXVsdHMgaW4gdGhlIFZNTSwgSSBtZWFuIHRoZSB3aG9sZSBwcm9jZXNz Cj4gdGhhdCBoYW5kbGVzIGd1ZXN0IHBhZ2UgZmF1bHRzLgo+IHdpdGhvdXQgVklSVElPX0JBTExP T05fRl9SRVBPUlRJTkcsIHBhZ2VzIHVzZWQgYnkgZ3Vlc3RzIHdpbGwgYmUgemVybwo+IG91dCBv bmx5IG9uY2UgYnkgaG9zdC4gV2l0aCBWSVJUSU9fQkFMTE9PTl9GX1JFUE9SVElORywgZnJlZSBw YWdlcyBhcmUKPiByZWNsYWltZWQgYnkgdGhlIGhvc3QgYW5kIG1heSByZXR1cm4gdG8gdGhlIGhv c3QgYnVkZHkKPiBmcmVlIGxpc3QuIFdoZW4gdGhlIHBhZ2VzIGFyZSBnaXZlbiBiYWNrIHRvIHRo ZSBndWVzdCwgdGhlIGhvc3Qga2VybmVsCj4gbmVlZHMgdG8gemVybyBvdXQgaXQgYWdhaW4uIEl0 IG1lYW5zCj4gd2l0aCBWSVJUSU9fQkFMTE9PTl9GX1JFUE9SVElORywgZ3Vlc3QgbWVtb3J5IHBl cmZvcm1hbmNlIHdpbGwgYmUKPiBkZWdyYWRlZCBmb3IgZnJlcXVlbnRseQo+IHplcm8gb3V0IG9w ZXJhdGlvbiBvbiBob3N0IHNpZGUuIFRoZSBwZXJmb3JtYW5jZSBkZWdyYWRhdGlvbiB3aWxsIGJl Cj4gb2J2aW91cyBmb3IgaHVnZSBwYWdlIGNhc2UuIEZyZWUKPiBwYWdlIHByZSB6ZXJvIG91dCBj YW4gaGVscCB0byBtYWtlIGd1ZXN0IG1lbW9yeSBwZXJmb3JtYW5jZSBhbG1vc3QgdGhlCj4gc2Ft ZSBhcyB3aXRob3V0Cj4gVklSVElPX0JBTExPT05fRl9SRVBPUlRJTkcuCgpZZXMsIHdoYXQgSSBh bSBzYXlpbmcgaXMgdGhhdCB0aGlzIGZhdWx0IGhhbmRsaW5nIGlzIG5vIGRpZmZlcmVudCB0bwpv cmRpbmFyeSBmYXVsdHMgd2hlbiBhY2Nlc3NpbmcgYSB2aXJ0dWFsIG1lbW9yeSBsb2NhdGlvbiB0 aGUgZmlyc3QgdGltZQphbmQgcG9wdWxhdGluZyBhIHBhZ2UuIFRoZSBvbmx5IGRpZmZlcmVuY2Ug aXMgdGhhdCBpdCBoYXBwZW5zCmNvbnRpbnVvdXNseSwgbm90IG9ubHkgdGhlIGZpcnN0IHRpbWUg d2UgdG91Y2ggYSBwYWdlLgoKQW5kIHdlIG1pZ2h0IGJlIGFibGUgdG8gaW1wcm92ZSBoYW5kbGlu ZyBpbiB0aGUgaHlwZXJ2aXNvciBpbiB0aGUKZnV0dXJlLiBXZSBoYXZlIGJlZW4gZGlzY3Vzc2lu ZyB1c2luZyBNQURWX0ZSRUUgaW5zdGVhZCBvZiBNQURWX0RPTlRORUVECmluIFFFTVUgZm9yIGhh bmRsaW5nIGZyZWUgcGFnZSByZXBvcnRpbmcuIFRoZW4sIGd1ZXN0IHJlcG9ydGVkIHBhZ2VzCndp bGwgb25seSBnZXQgcmVjbGFpbWVkIGJ5IHRoZSBoeXBlcnZpc29yIHdoZW4gdGhlcmUgaXMgYWN0 dWFsIG1lbW9yeQpwcmVzc3VyZSBpbiB0aGUgaHlwZXJ2aXNvciAoZS5nLiwgd2hlbiBhYm91dCB0 byBzd2FwKS4gQW5kIHplcm9pbmcgYQpwYWdlIGlzIGFuIG9idmlvdXMgaW1wcm92ZW1lbnQgb3Zl ciBnb2luZyB0byBzd2FwLiBUaGUgcHJpY2UgZm9yIHplcm9pbmcKcGFnZXMgaGFzIHRvIGJlIHBh aWQgYXQgb25lIHBvaW50LgoKQWxzbyBub3RlIHRoYXQgd2UndmUgYmVlbiBkaXNjdXNzaW5nIGNh Y2hlLXJlbGF0ZWQgdGhpbmdzIGFscmVhZHkuIElmCnlvdSB6ZXJvIG91dCBiZWZvcmUgZ2l2aW5n IHRoZSBwYWdlIHRvIHRoZSBndWVzdCwgdGhlIHBhZ2Ugd2lsbCBhbHJlYWR5CmJlIGluIHRoZSBj YWNoZSAtIHdoZXJlIHRoZSBndWVzdCBkaXJlY3RseSB3YW50cyB0byBhY2Nlc3MgaXQuCgpbLi4u XQoKPj4+Cj4+PiBTZWN1cml0eQo+Pj4gPT09PT09PT0KPj4+IFRoaXMgaXMgYSB3ZWFrIHZlcnNp b24gb2YgImludHJvZHVjZSBpbml0X29uX2FsbG9jPTEgYW5kIGluaXRfb25fZnJlZT0xCj4+PiBi b290IG9wdGlvbnMiLCB3aGljaCB6ZXJvIG91dCBwYWdlIGluIGEgYXN5bmNocm9ub3VzIHdheS4g Rm9yIHVzZXJzIGNhbid0Cj4+PiB0b2xlcmF0ZSB0aGUgaW1wYWN0aW9uIG9mICdpbml0X29uX2Fs bG9jPTEnIG9yICdpbml0X29uX2ZyZWU9MScgYnJpbmdzLAo+Pj4gdGhpcyBmZWF1dHVyZSBwcm92 aWRlIGFub3RoZXIgY2hvaWNlLgo+PiAid2UgZG9u4oCZdCBwcmUgemVybyBvdXQgYWxsIHRoZSBm cmVlIHBhZ2VzIiBzbyB0aGlzIGlzIG9mIGxpdHRsZSBhY3R1YWwgdXNlLgo+IAo+IE9LLiBJdCBz ZWVtcyBub25lIG9mIHRoZSByZWFzb25zIGxpc3RlZCBhYm92ZSBpcyBzdHJvbmcgZW5vdWdoIGZv cgoKSSB3YXMgcmF0aGVyIHNheWluZyB0aGF0IGZvciBzZWN1cml0eSBpdCdzIG9mIGxpdHRsZSB1 c2UgSU1ITy4KQXBwbGljYXRpb24vVk0gc3RhcnQgdXAgdGltZSBtaWdodCBiZSBpbXByb3ZlZCBi eSB1c2luZyBodWdlIHBhZ2VzIChhbmQKcHJlLXplcm9pbmcgdGhlc2UpLiBGcmVlIHBhZ2UgcmVw b3J0aW5nIG1pZ2h0IGJlIGltcHJvdmVkIGJ5IHVzaW5nCk1BRFZfRlJFRSBpbnN0ZWFkIG9mIE1B RFZfRE9OVE5FRUQgaW4gdGhlIGh5cGVydmlzb3IuCgo+IHRoaXMgZmVhdHVyZSwgYWJvdmUgYWxs IG9mIHRoZW0sIHdoaWNoIG9uZSBpcyBsaWtlbHkgdG8gYmVjb21lIHRoZQo+IG1vc3Qgc3Ryb25n IG9uZT8gIEZyb20gdGhlIGltcGxlbWVudGF0aW9uLCB5b3Ugd2lsbCBmaW5kIGl0IGlzCj4gY29u ZmlndXJhYmxlLCB1c2VycyBkb24ndCB3YW50IHRvIHVzZSBpdCBjYW4gdHVybiBpdCBvZmYuICBU aGlzIGlzIG5vdAo+IGFuIG9wdGlvbj8KCldlbGwsIHdlIGhhdmUgdG8gbWFpbnRhaW4gdGhlIGZl YXR1cmUgYW5kIHNhY3JpZmljZSBhIHBhZ2UgZmxhZy4gRm9yCmV4YW1wbGUsIGRvIHdlIGV4cGVj dCBzb21lb25lIGV4cGxpY2l0bHkgZW5hYmxpbmcgdGhlIGZlYXR1cmUganVzdCB0bwpzcGVlZCB1 cCBzdGFydHVwIHRpbWUgb2YgYW4gYXBwIHRoYXQgY29uc3VtZXMgYSBsb3Qgb2YgbWVtb3J5PyBJ IGhpZ2hseQpkb3VidCBpdC4KCkknZCBsb3ZlIHRvIGhlYXIgb3BpbmlvbnMgb2Ygb3RoZXIgcGVv cGxlLiAoYSBsb3Qgb2YgcGVvcGxlIGFyZSBvZmZsaW5lCnVudGlsIGJlZ2lubmluZyBvZiBKYW51 YXJ5LCBpbmNsdWRpbmcsIHdlbGwsIGFjdHVhbGx5IG1lIDopICkKCi0tIApUaGFua3MsCgpEYXZp ZCAvIGRoaWxkZW5iCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRpb25AbGlzdHMubGlu dXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxt YW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=