From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751071AbcGFED7 (ORCPT ); Wed, 6 Jul 2016 00:03:59 -0400 Received: from out4133-146.mail.aliyun.com ([42.120.133.146]:47394 "EHLO out4133-146.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751009AbcGFEDv (ORCPT ); Wed, 6 Jul 2016 00:03:51 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R601e4;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e02c03288;MF=hillf.zj@alibaba-inc.com;NM=1;PH=DS;RN=3;SR=0;TI=SMTPD_----5-smNhm_1467777808; Reply-To: "Hillf Danton" From: "Hillf Danton" To: "'Martin Schwidefsky'" Cc: "linux-kernel" , References: <014201d1d738$744c8f90$5ce5aeb0$@alibaba-inc.com> In-Reply-To: <014201d1d738$744c8f90$5ce5aeb0$@alibaba-inc.com> Subject: Re: [PATCH 2/2] s390/mm: use ipte range to invalidate multiple page table entries Date: Wed, 06 Jul 2016 12:03:28 +0800 Message-ID: <014601d1d73b$5a3c0420$0eb40c60$@alibaba-inc.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQK8Vkg+lnz5ZwkbbcG+Wzrq/undzZ41xsOA Content-Language: zh-cn Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > +void ptep_invalidate_range(struct mm_struct *mm, unsigned long start, > + unsigned long end, pte_t *ptep) > +{ > + unsigned long nr; > + > + if (!MACHINE_HAS_IPTE_RANGE || mm_has_pgste(mm)) > + return; > + preempt_disable(); > + nr = (end - start) >> PAGE_SHIFT; > + /* If the flush is likely to be local skip the ipte range */ > + if (nr && !cpumask_equal(mm_cpumask(mm), > + cpumask_of(smp_processor_id()))) s/smp/raw_smp/ to avoid adding schedule entry with page table lock held? > + __ptep_ipte_range(start, nr - 1, ptep); > + preempt_enable(); > +} > +EXPORT_SYMBOL(ptep_invalidate_range); > + thanks Hillf