| Message ID | 20190927234008.11513-12-leonardo@linux.ibm.com |
|---|---|
| State | Changes Requested |
| Headers | show
Return-Path: <kvm-ppc-owner@vger.kernel.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=<UNKNOWN>) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46g7dB2CDqz9sPd for <incoming@patchwork.ozlabs.org>; Sat, 28 Sep 2019 09:42:38 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726321AbfI0Xme (ORCPT <rfc822;incoming@patchwork.ozlabs.org>); Fri, 27 Sep 2019 19:42:34 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:24652 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725815AbfI0Xmd (ORCPT <rfc822;kvm-ppc@vger.kernel.org>); 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Fri, 27 Sep 2019 23:41:59 +0000 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp23033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x8RNfx7F37159414 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 27 Sep 2019 23:41:59 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1332B112069; Fri, 27 Sep 2019 23:41:59 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DCD9D112063; Fri, 27 Sep 2019 23:41:03 +0000 (GMT) Received: from LeoBras.aus.stglabs.ibm.com (unknown [9.18.235.58]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Fri, 27 Sep 2019 23:41:03 +0000 (GMT) From: Leonardo Bras <leonardo@linux.ibm.com> To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org Cc: Leonardo Bras <leonardo@linux.ibm.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, Arnd Bergmann <arnd@arndb.de>, "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>, Christophe Leroy <christophe.leroy@c-s.fr>, Andrew Morton <akpm@linux-foundation.org>, Dan Williams <dan.j.williams@intel.com>, Nicholas Piggin <npiggin@gmail.com>, Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>, Allison Randal <allison@lohutok.net>, Thomas Gleixner <tglx@linutronix.de>, Ganesh Goudar <ganeshgr@linux.ibm.com>, Mike Rapoport <rppt@linux.ibm.com>, YueHaibing <yuehaibing@huawei.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Ira Weiny <ira.weiny@intel.com>, Jason Gunthorpe <jgg@ziepe.ca>, John Hubbard <jhubbard@nvidia.com>, Keith Busch <keith.busch@intel.com> Subject: [PATCH v4 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing Date: Fri, 27 Sep 2019 20:40:08 -0300 Message-Id: <20190927234008.11513-12-leonardo@linux.ibm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190927234008.11513-1-leonardo@linux.ibm.com> References: <20190927234008.11513-1-leonardo@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-27_09:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=663 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909270206 Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: <kvm-ppc.vger.kernel.org> X-Mailing-List: kvm-ppc@vger.kernel.org |
| Series |
Introduces new count-based method for monitoring lockless pagetable walks
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expand
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diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index 6ba6195bff1b..27966481f2a6 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -95,7 +95,8 @@ static void do_nothing(void *unused) void serialize_against_pte_lookup(struct mm_struct *mm) { smp_mb(); - smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1); + if (running_lockless_pgtbl_walk(mm)) + smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1); } /*
Skips slow part of serialize_against_pte_lookup if there is no running lockless pagetable walk. Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com> --- arch/powerpc/mm/book3s64/pgtable.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)