From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751424AbdH3NVh (ORCPT ); Wed, 30 Aug 2017 09:21:37 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:40019 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751302AbdH3NVf (ORCPT ); Wed, 30 Aug 2017 09:21:35 -0400 Subject: Re: [PATCH v7 07/11] sparc64: optimized struct page zeroing To: David Miller Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, kasan-dev@googlegroups.com, borntraeger@de.ibm.com, heiko.carstens@de.ibm.com, willy@infradead.org, mhocko@kernel.org, ard.biesheuvel@linaro.org, will.deacon@arm.com, catalin.marinas@arm.com, sam@ravnborg.org, mgorman@techsingularity.net, Steven.Sistare@oracle.com, daniel.m.jordan@oracle.com, bob.picco@oracle.com References: <1503972142-289376-1-git-send-email-pasha.tatashin@oracle.com> <1503972142-289376-8-git-send-email-pasha.tatashin@oracle.com> <20170829.181208.171985548699678313.davem@davemloft.net> From: Pasha Tatashin Message-ID: Date: Wed, 30 Aug 2017 09:19:58 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <20170829.181208.171985548699678313.davem@davemloft.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Dave, Thank you for acking. The reason I am not doing initializing stores is because they require a membar, even if only regular stores are following (I hoped to do a membar before first load). This is something I was thinking was not true, but after consulting with colleagues and checking processor manual, I verified that it is the case. Pasha > > You should probably use initializing stores when you are doing 8 > stores and we thus know the page struct is cache line aligned. > > But other than that: > > Acked-by: David S. Miller From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pasha Tatashin Date: Wed, 30 Aug 2017 13:19:58 +0000 Subject: Re: [PATCH v7 07/11] sparc64: optimized struct page zeroing Message-Id: List-Id: References: <1503972142-289376-1-git-send-email-pasha.tatashin@oracle.com> <1503972142-289376-8-git-send-email-pasha.tatashin@oracle.com> <20170829.181208.171985548699678313.davem@davemloft.net> In-Reply-To: <20170829.181208.171985548699678313.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Hi Dave, Thank you for acking. The reason I am not doing initializing stores is because they require a membar, even if only regular stores are following (I hoped to do a membar before first load). This is something I was thinking was not true, but after consulting with colleagues and checking processor manual, I verified that it is the case. Pasha > > You should probably use initializing stores when you are doing 8 > stores and we thus know the page struct is cache line aligned. > > But other than that: > > Acked-by: David S. Miller From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f199.google.com (mail-qk0-f199.google.com [209.85.220.199]) by kanga.kvack.org (Postfix) with ESMTP id C22E96B025F for ; Wed, 30 Aug 2017 09:20:54 -0400 (EDT) Received: by mail-qk0-f199.google.com with SMTP id y68so18368197qka.2 for ; Wed, 30 Aug 2017 06:20:54 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id d6si5225807qta.281.2017.08.30.06.20.53 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Aug 2017 06:20:53 -0700 (PDT) Subject: Re: [PATCH v7 07/11] sparc64: optimized struct page zeroing References: <1503972142-289376-1-git-send-email-pasha.tatashin@oracle.com> <1503972142-289376-8-git-send-email-pasha.tatashin@oracle.com> <20170829.181208.171985548699678313.davem@davemloft.net> From: Pasha Tatashin Message-ID: Date: Wed, 30 Aug 2017 09:19:58 -0400 MIME-Version: 1.0 In-Reply-To: <20170829.181208.171985548699678313.davem@davemloft.net> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: David Miller Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, kasan-dev@googlegroups.com, borntraeger@de.ibm.com, heiko.carstens@de.ibm.com, willy@infradead.org, mhocko@kernel.org, ard.biesheuvel@linaro.org, will.deacon@arm.com, catalin.marinas@arm.com, sam@ravnborg.org, mgorman@techsingularity.net, Steven.Sistare@oracle.com, daniel.m.jordan@oracle.com, bob.picco@oracle.com Hi Dave, Thank you for acking. The reason I am not doing initializing stores is because they require a membar, even if only regular stores are following (I hoped to do a membar before first load). This is something I was thinking was not true, but after consulting with colleagues and checking processor manual, I verified that it is the case. Pasha > > You should probably use initializing stores when you are doing 8 > stores and we thus know the page struct is cache line aligned. > > But other than that: > > Acked-by: David S. Miller -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 From: pasha.tatashin@oracle.com (Pasha Tatashin) Date: Wed, 30 Aug 2017 09:19:58 -0400 Subject: [PATCH v7 07/11] sparc64: optimized struct page zeroing In-Reply-To: <20170829.181208.171985548699678313.davem@davemloft.net> References: <1503972142-289376-1-git-send-email-pasha.tatashin@oracle.com> <1503972142-289376-8-git-send-email-pasha.tatashin@oracle.com> <20170829.181208.171985548699678313.davem@davemloft.net> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Dave, Thank you for acking. The reason I am not doing initializing stores is because they require a membar, even if only regular stores are following (I hoped to do a membar before first load). This is something I was thinking was not true, but after consulting with colleagues and checking processor manual, I verified that it is the case. Pasha > > You should probably use initializing stores when you are doing 8 > stores and we thus know the page struct is cache line aligned. > > But other than that: > > Acked-by: David S. Miller