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=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 BF134C73C65 for ; Wed, 10 Jul 2019 00:35:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86CD220645 for ; Wed, 10 Jul 2019 00:35:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=os.amperecomputing.com header.i=@os.amperecomputing.com header.b="XjQCg58D" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726936AbfGJAfD (ORCPT ); Tue, 9 Jul 2019 20:35:03 -0400 Received: from mail-eopbgr680115.outbound.protection.outlook.com ([40.107.68.115]:42119 "EHLO NAM04-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726444AbfGJAfD (ORCPT ); Tue, 9 Jul 2019 20:35:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=os.amperecomputing.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=2DXeYGwDAu8XiBRuIFYeU35G8ERKcDs4TKxSlAcuhhQ=; b=XjQCg58DJh5OWvBF27jHXcjJdIs9et5RPAEB96GUpfBPzRiOvqRix5m2vwihDnxYPRuHYwHpSTSgym0Gi69ZOB1lZQf8TekQ7pemn07PYtvKlW87mISqtx/adYE+YrVW0oIo7oqtHdU2emat+85KTeXBzVtefhwY0aGA/TFXvfU= Received: from SN6PR01MB4094.prod.exchangelabs.com (52.135.119.23) by SN6PR01MB3790.prod.exchangelabs.com (52.132.123.140) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2052.18; Wed, 10 Jul 2019 00:34:19 +0000 Received: from SN6PR01MB4094.prod.exchangelabs.com ([fe80::b958:7797:c21b:5725]) by SN6PR01MB4094.prod.exchangelabs.com ([fe80::b958:7797:c21b:5725%5]) with mapi id 15.20.2052.020; Wed, 10 Jul 2019 00:34:19 +0000 From: Hoan Tran OS To: Thomas Gleixner CC: Catalin Marinas , Will Deacon , Andrew Morton , Michal Hocko , Vlastimil Babka , Oscar Salvador , Pavel Tatashin , Mike Rapoport , Alexander Duyck , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Ingo Molnar , Borislav Petkov , "H . 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Tue, 9 Jul 2019 20:35:03 -0400 From: Hoan Tran OS Subject: Re: [PATCH 3/5] x86: Kconfig: Remove CONFIG_NODES_SPAN_OTHER_NODES Date: Wed, 10 Jul 2019 00:34:19 +0000 Message-ID: <1c5bc3a8-0c6f-dce3-95a2-8aec765408a2@os.amperecomputing.com> References: <1561501810-25163-1-git-send-email-Hoan@os.amperecomputing.com> <1561501810-25163-4-git-send-email-Hoan@os.amperecomputing.com> In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: <856DBE6A98D2C64F9203DA2E92E3CCD6@prod.exchangelabs.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-s390-owner@vger.kernel.org List-ID: To: Thomas Gleixner Cc: Catalin Marinas , Will Deacon , Andrew Morton , Michal Hocko , Vlastimil Babka , Oscar Salvador , Pavel Tatashin , Mike Rapoport , Alexander Duyck , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , "David S . Miller" , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , "open list:MEMORY MANAGEMENT" , "linux-arm-kernel@lists.infradead.org" , "linux-s390@vger.kernel.org" , "sparclinux@vger.kernel.org" , "x86@kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" , Open Source Submission SGkgVGhvbWFzLA0KDQpUaGFua3MgZm9yIHlvdSBjb21tZW50cw0KDQpPbiA2LzI1LzE5IDM6NDUg UE0sIFRob21hcyBHbGVpeG5lciB3cm90ZToNCj4gSG9hbiwNCj4gDQo+IE9uIFR1ZSwgMjUgSnVu IDIwMTksIEhvYW4gVHJhbiBPUyB3cm90ZToNCj4gDQo+IFBsZWFzZSB1c2UgJ3g4Ni9LY29uZmln OiAnIGFzIHByZWZpeC4NCj4gDQo+PiBUaGlzIHBhdGNoIHJlbW92ZXMgQ09ORklHX05PREVTX1NQ QU5fT1RIRVJfTk9ERVMgYXMgaXQncw0KPj4gZW5hYmxlZCBieSBkZWZhdWx0IHdpdGggTlVNQS4N Cj4gDQo+IFBsZWFzZSBkbyBub3QgdXNlICdUaGlzIHBhdGNoJyBpbiBjaGFuZ2Vsb2dzLiBJdCdz IHBvaW50bGVzcyBiZWNhdXNlIHdlDQo+IGFscmVhZHkga25vdyB0aGF0IHRoaXMgaXMgYSBwYXRj aC4NCj4gDQo+IFNlZSBhbHNvIERvY3VtZW50YXRpb24vcHJvY2Vzcy9zdWJtaXR0aW5nLXBhdGNo ZXMucnN0IGFuZCBzZWFyY2ggZm9yICdUaGlzDQo+IHBhdGNoJw0KPiANCj4gU2ltcGx5IHNheToN Cj4gDQo+ICAgIFJlbW92ZSBDT05GSUdfTk9ERVNfU1BBTl9PVEhFUl9OT0RFUyBhcyBpdCdzIGVu YWJsZWQgYnkgZGVmYXVsdCB3aXRoDQo+ICAgIE5VTUEuDQo+IA0KDQpHb3QgaXQsIHdpbGwgZml4 DQoNCj4gQnV0IC4uLi4uDQo+IA0KPj4gQEAgLTE1NjcsMTUgKzE1NjcsNiBAQCBjb25maWcgWDg2 XzY0X0FDUElfTlVNQQ0KPj4gICAJLS0taGVscC0tLQ0KPj4gICAJICBFbmFibGUgQUNQSSBTUkFU IGJhc2VkIG5vZGUgdG9wb2xvZ3kgZGV0ZWN0aW9uLg0KPj4gICANCj4+IC0jIFNvbWUgTlVNQSBu b2RlcyBoYXZlIG1lbW9yeSByYW5nZXMgdGhhdCBzcGFuDQo+PiAtIyBvdGhlciBub2Rlcy4gIEV2 ZW4gdGhvdWdoIGEgcGZuIGlzIHZhbGlkIGFuZA0KPj4gLSMgYmV0d2VlbiBhIG5vZGUncyBzdGFy dCBhbmQgZW5kIHBmbnMsIGl0IG1heSBub3QNCj4+IC0jIHJlc2lkZSBvbiB0aGF0IG5vZGUuICBT ZWUgbWVtbWFwX2luaXRfem9uZSgpDQo+PiAtIyBmb3IgZGV0YWlscy4NCj4+IC1jb25maWcgTk9E RVNfU1BBTl9PVEhFUl9OT0RFUw0KPj4gLQlkZWZfYm9vbCB5DQo+PiAtCWRlcGVuZHMgb24gWDg2 XzY0X0FDUElfTlVNQQ0KPiANCj4gdGhlIGNoYW5nZWxvZyBkb2VzIG5vdCBtZW50aW9uIHRoYXQg dGhpcyBsaWZ0cyB0aGUgZGVwZW5kZW5jeSBvbg0KPiBYODZfNjRfQUNQSV9OVU1BIGFuZCB0aGVy ZWZvcmUgZW5hYmxlcyB0aGF0IGZ1bmN0aW9uYWxpdHkgZm9yIGFueXRoaW5nDQo+IHdoaWNoIGhh cyBOVU1BIGVuYWJsZWQgaW5jbHVkaW5nIDMyYml0Lg0KPiANCg0KSSB0aGluayB0aGlzIGNvbmZp ZyBpcyB1c2VkIGZvciBhIE5VTUEgbGF5b3V0IHdoaWNoIE5VTUEgbm9kZXMgYWRkcmVzc2VzIA0K YXJlIHNwYW5uZWQgdG8gb3RoZXIgbm9kZXMuIEkgdGhpbmsgMzJiaXQgTlVNQSBhbHNvIGhhdmUg dGhlIHNhbWUgaXNzdWUgDQp3aXRoIHRoYXQgbGF5b3V0LiBQbGVhc2UgY29ycmVjdCBtZSBpZiBJ J20gd3JvbmcuDQoNCj4gVGhlIGNvcmUgbW0gY2hhbmdlIGdpdmVzIG5vIGhlbHBmdWwgaW5mb3Jt YXRpb24gZWl0aGVyLiBZb3UganVzdCBjb3BpZWQgdGhlDQo+IGFib3ZlIGNvbW1lbnQgdGV4dCBm cm9tIHNvbWUgcmFuZG9tIEtjb25maWcuDQoNClllcywgYXMgaXQncyBhIGNvcnJlY3QgY29tbWVu dCBhbmQgaXMgdXNlZCBhdCBtdWx0aXBsZSBwbGFjZXMuDQoNClRoYW5rcw0KSG9hbg0KDQo+IA0K PiBUaGlzIG5lZWRzIGEgYml0IG1vcmUgZGF0YSBpbiB0aGUgY2hhbmdlbG9ncyBhbmQgdGhlIGNv dmVyIGxldHRlcjoNCj4gDQo+ICAgICAgIC0gV2h5IGlzIGl0IHVzZWZ1bCB0byBlbmFibGUgaXQg dW5jb25kaXRpb25hbGx5DQo+IA0KPiAgICAgICAtIFdoeSBpcyBpdCBzYWZlIHRvIGRvIHNvLCBl dmVuIGlmIHRoZSBhcmNoaXRlY3R1cmUgaGFkIGNvbnN0cmFpbnRzIG9uDQo+ICAgICAgICAgaXQN Cj4gDQo+ICAgICAgIC0gV2hhdCdzIHRoZSBwb3RlbnRpYWwgaW1wYWN0DQo+IA0KPiBUaGFua3Ms DQo+IA0KPiAJdGdseA0KPiANCg== From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hoan Tran OS Date: Wed, 10 Jul 2019 00:34:19 +0000 Subject: Re: [PATCH 3/5] x86: Kconfig: Remove CONFIG_NODES_SPAN_OTHER_NODES Message-Id: <1c5bc3a8-0c6f-dce3-95a2-8aec765408a2@os.amperecomputing.com> List-Id: References: <1561501810-25163-1-git-send-email-Hoan@os.amperecomputing.com> <1561501810-25163-4-git-send-email-Hoan@os.amperecomputing.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Thomas Gleixner Cc: Michal Hocko , Catalin Marinas , Heiko Carstens , "open list:MEMORY MANAGEMENT" , Paul Mackerras , "H . Peter Anvin" , "sparclinux@vger.kernel.org" , Alexander Duyck , "linux-s390@vger.kernel.org" , Michael Ellerman , "x86@kernel.org" , Mike Rapoport , Christian Borntraeger , Ingo Molnar , Vlastimil Babka , Benjamin Herrenschmidt , Open Source Submission , Pavel Tatashin , Vasily Gorbik , Will Deacon , Borislav Petkov , "linux-arm-kernel@lists.infradead.org" , Oscar Salvador , "linux-kernel@vger.kernel.org" , Andrew Morton , "linuxppc-dev@lists.ozlabs.org" , "David S . Miller" SGkgVGhvbWFzLA0KDQpUaGFua3MgZm9yIHlvdSBjb21tZW50cw0KDQpPbiA2LzI1LzE5IDM6NDUg UE0sIFRob21hcyBHbGVpeG5lciB3cm90ZToNCj4gSG9hbiwNCj4gDQo+IE9uIFR1ZSwgMjUgSnVu IDIwMTksIEhvYW4gVHJhbiBPUyB3cm90ZToNCj4gDQo+IFBsZWFzZSB1c2UgJ3g4Ni9LY29uZmln OiAnIGFzIHByZWZpeC4NCj4gDQo+PiBUaGlzIHBhdGNoIHJlbW92ZXMgQ09ORklHX05PREVTX1NQ QU5fT1RIRVJfTk9ERVMgYXMgaXQncw0KPj4gZW5hYmxlZCBieSBkZWZhdWx0IHdpdGggTlVNQS4N Cj4gDQo+IFBsZWFzZSBkbyBub3QgdXNlICdUaGlzIHBhdGNoJyBpbiBjaGFuZ2Vsb2dzLiBJdCdz IHBvaW50bGVzcyBiZWNhdXNlIHdlDQo+IGFscmVhZHkga25vdyB0aGF0IHRoaXMgaXMgYSBwYXRj aC4NCj4gDQo+IFNlZSBhbHNvIERvY3VtZW50YXRpb24vcHJvY2Vzcy9zdWJtaXR0aW5nLXBhdGNo ZXMucnN0IGFuZCBzZWFyY2ggZm9yICdUaGlzDQo+IHBhdGNoJw0KPiANCj4gU2ltcGx5IHNheToN Cj4gDQo+ICAgIFJlbW92ZSBDT05GSUdfTk9ERVNfU1BBTl9PVEhFUl9OT0RFUyBhcyBpdCdzIGVu YWJsZWQgYnkgZGVmYXVsdCB3aXRoDQo+ICAgIE5VTUEuDQo+IA0KDQpHb3QgaXQsIHdpbGwgZml4 DQoNCj4gQnV0IC4uLi4uDQo+IA0KPj4gQEAgLTE1NjcsMTUgKzE1NjcsNiBAQCBjb25maWcgWDg2 XzY0X0FDUElfTlVNQQ0KPj4gICAJLS0taGVscC0tLQ0KPj4gICAJICBFbmFibGUgQUNQSSBTUkFU IGJhc2VkIG5vZGUgdG9wb2xvZ3kgZGV0ZWN0aW9uLg0KPj4gICANCj4+IC0jIFNvbWUgTlVNQSBu b2RlcyBoYXZlIG1lbW9yeSByYW5nZXMgdGhhdCBzcGFuDQo+PiAtIyBvdGhlciBub2Rlcy4gIEV2 ZW4gdGhvdWdoIGEgcGZuIGlzIHZhbGlkIGFuZA0KPj4gLSMgYmV0d2VlbiBhIG5vZGUncyBzdGFy dCBhbmQgZW5kIHBmbnMsIGl0IG1heSBub3QNCj4+IC0jIHJlc2lkZSBvbiB0aGF0IG5vZGUuICBT ZWUgbWVtbWFwX2luaXRfem9uZSgpDQo+PiAtIyBmb3IgZGV0YWlscy4NCj4+IC1jb25maWcgTk9E RVNfU1BBTl9PVEhFUl9OT0RFUw0KPj4gLQlkZWZfYm9vbCB5DQo+PiAtCWRlcGVuZHMgb24gWDg2 XzY0X0FDUElfTlVNQQ0KPiANCj4gdGhlIGNoYW5nZWxvZyBkb2VzIG5vdCBtZW50aW9uIHRoYXQg dGhpcyBsaWZ0cyB0aGUgZGVwZW5kZW5jeSBvbg0KPiBYODZfNjRfQUNQSV9OVU1BIGFuZCB0aGVy ZWZvcmUgZW5hYmxlcyB0aGF0IGZ1bmN0aW9uYWxpdHkgZm9yIGFueXRoaW5nDQo+IHdoaWNoIGhh cyBOVU1BIGVuYWJsZWQgaW5jbHVkaW5nIDMyYml0Lg0KPiANCg0KSSB0aGluayB0aGlzIGNvbmZp ZyBpcyB1c2VkIGZvciBhIE5VTUEgbGF5b3V0IHdoaWNoIE5VTUEgbm9kZXMgYWRkcmVzc2VzIA0K YXJlIHNwYW5uZWQgdG8gb3RoZXIgbm9kZXMuIEkgdGhpbmsgMzJiaXQgTlVNQSBhbHNvIGhhdmUg dGhlIHNhbWUgaXNzdWUgDQp3aXRoIHRoYXQgbGF5b3V0LiBQbGVhc2UgY29ycmVjdCBtZSBpZiBJ J20gd3JvbmcuDQoNCj4gVGhlIGNvcmUgbW0gY2hhbmdlIGdpdmVzIG5vIGhlbHBmdWwgaW5mb3Jt YXRpb24gZWl0aGVyLiBZb3UganVzdCBjb3BpZWQgdGhlDQo+IGFib3ZlIGNvbW1lbnQgdGV4dCBm cm9tIHNvbWUgcmFuZG9tIEtjb25maWcuDQoNClllcywgYXMgaXQncyBhIGNvcnJlY3QgY29tbWVu dCBhbmQgaXMgdXNlZCBhdCBtdWx0aXBsZSBwbGFjZXMuDQoNClRoYW5rcw0KSG9hbg0KDQo+IA0K PiBUaGlzIG5lZWRzIGEgYml0IG1vcmUgZGF0YSBpbiB0aGUgY2hhbmdlbG9ncyBhbmQgdGhlIGNv dmVyIGxldHRlcjoNCj4gDQo+ICAgICAgIC0gV2h5IGlzIGl0IHVzZWZ1bCB0byBlbmFibGUgaXQg dW5jb25kaXRpb25hbGx5DQo+IA0KPiAgICAgICAtIFdoeSBpcyBpdCBzYWZlIHRvIGRvIHNvLCBl dmVuIGlmIHRoZSBhcmNoaXRlY3R1cmUgaGFkIGNvbnN0cmFpbnRzIG9uDQo+ICAgICAgICAgaXQN Cj4gDQo+ICAgICAgIC0gV2hhdCdzIHRoZSBwb3RlbnRpYWwgaW1wYWN0DQo+IA0KPiBUaGFua3Ms DQo+IA0KPiAJdGdseA0KPiANCg= 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=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 DE074C73C63 for ; 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Peter Anvin" , "sparclinux@vger.kernel.org" , Alexander Duyck , "linux-s390@vger.kernel.org" , Michael Ellerman , "x86@kernel.org" , Mike Rapoport , Christian Borntraeger , Ingo Molnar , Vlastimil Babka , Benjamin Herrenschmidt , Open Source Submission , Pavel Tatashin , Vasily Gorbik , Will Deacon , Borislav Petkov , "linux-arm-kernel@lists.infradead.org" , Oscar Salvador , "linux-kernel@vger.kernel.org" , Andrew Morton , "linuxppc-dev@lists.ozlabs.org" , "David S . Miller" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Thomas, Thanks for you comments On 6/25/19 3:45 PM, Thomas Gleixner wrote: > Hoan, > > On Tue, 25 Jun 2019, Hoan Tran OS wrote: > > Please use 'x86/Kconfig: ' as prefix. > >> This patch removes CONFIG_NODES_SPAN_OTHER_NODES as it's >> enabled by default with NUMA. > > Please do not use 'This patch' in changelogs. It's pointless because we > already know that this is a patch. > > See also Documentation/process/submitting-patches.rst and search for 'This > patch' > > Simply say: > > Remove CONFIG_NODES_SPAN_OTHER_NODES as it's enabled by default with > NUMA. > Got it, will fix > But ..... > >> @@ -1567,15 +1567,6 @@ config X86_64_ACPI_NUMA >> ---help--- >> Enable ACPI SRAT based node topology detection. >> >> -# Some NUMA nodes have memory ranges that span >> -# other nodes. Even though a pfn is valid and >> -# between a node's start and end pfns, it may not >> -# reside on that node. See memmap_init_zone() >> -# for details. >> -config NODES_SPAN_OTHER_NODES >> - def_bool y >> - depends on X86_64_ACPI_NUMA > > the changelog does not mention that this lifts the dependency on > X86_64_ACPI_NUMA and therefore enables that functionality for anything > which has NUMA enabled including 32bit. > I think this config is used for a NUMA layout which NUMA nodes addresses are spanned to other nodes. I think 32bit NUMA also have the same issue with that layout. Please correct me if I'm wrong. > The core mm change gives no helpful information either. You just copied the > above comment text from some random Kconfig. Yes, as it's a correct comment and is used at multiple places. Thanks Hoan > > This needs a bit more data in the changelogs and the cover letter: > > - Why is it useful to enable it unconditionally > > - Why is it safe to do so, even if the architecture had constraints on > it > > - What's the potential impact > > Thanks, > > tglx > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel