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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 891D1C433E0 for ; Fri, 26 Jun 2020 22:36:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6612E20C09 for ; Fri, 26 Jun 2020 22:36:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="cQRSQ9uz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726150AbgFZWgd (ORCPT ); Fri, 26 Jun 2020 18:36:33 -0400 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:27884 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725913AbgFZWga (ORCPT ); Fri, 26 Jun 2020 18:36:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593210989; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8WnWhn2O9ddpmgT5q7yGLFrwE17K5+WMrtUB+3cLWEw=; b=cQRSQ9uzfvZ50GPk9fHVJQL02EHHobJc9iJYimpUDngl15EEbQO5fvsCOsO+KeBKkVmcUy lIXAdOtY8v5utsLsz0KvW3Y1WDFIcKLWWw1oTNGIMSMUQi76AB4EmbBjR86UINSmND75sL XBENpRVI/CQ4/OsGnVt8Sx8XVS5bCXE= Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-32-S64NJxkDMQWxLEzfhIGuLA-1; Fri, 26 Jun 2020 18:36:28 -0400 X-MC-Unique: S64NJxkDMQWxLEzfhIGuLA-1 Received: by mail-qv1-f72.google.com with SMTP id da10so7406281qvb.2 for ; Fri, 26 Jun 2020 15:36:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=8WnWhn2O9ddpmgT5q7yGLFrwE17K5+WMrtUB+3cLWEw=; b=pqD+9WDyu9FtPR6Tkz2uhxV3IpDURrjh7sCYuKwBEULAGZ5ed6pxdIx17Mw71tU/91 aWSBZCAE4cqR9H5iTQCStlNLWnbbVNZ2EKoEHLObjdtKOjgiLG1wvcUe40CAzbX0u6Hk ll5XXspS+wS1sdp67yBxAwV3zu+qLR9JAiRadSieE0dADhQU2jQh6w9knLZwjXZvHvHY UkcATlI9HwC5+K9hWutFwwvkukTE6vxE84dVk73hOTPSwaJOlrjjVVV5Gs0lBKx19+xg RV69w7P0tlbdbF8NpmP3WuBL5zqmwbzix6kjczhBCCnsaEb/1V0oHNBUqRzajP9zGxM8 NlEA== X-Gm-Message-State: AOAM532KfwRvdUEQdfGE8xCwOT8Ig62DsVjHmSB14MqJdAeRJ/aKTLoX ORfIGzAKtfmGkvBXW2G+lphjkbxKZOH81JibZljdyv5J7myZ/yyyti8T0kC7EeIH44ojTGZ429w 6/b7SWJNDlQXCmUR+kJYNQ83f X-Received: by 2002:a05:620a:994:: with SMTP id x20mr2758441qkx.367.1593210987669; Fri, 26 Jun 2020 15:36:27 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyF7mXzjX2GYCldg8rpVKH+R/6CyjRUZNLT2pL9QW2hEVm9X8g93t+Jx2O/OTIhETTp/0bRvw== X-Received: by 2002:a05:620a:994:: with SMTP id x20mr2758423qkx.367.1593210987471; Fri, 26 Jun 2020 15:36:27 -0700 (PDT) Received: from xz-x1.redhat.com ([2607:9880:19c0:32::2]) by smtp.gmail.com with ESMTPSA id t9sm9463853qke.68.2020.06.26.15.36.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Jun 2020 15:36:26 -0700 (PDT) From: Peter Xu To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Peter Xu , Andrew Morton , Linus Torvalds , Gerald Schaefer , Andrea Arcangeli , Will Deacon , Michael Ellerman , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH 17/26] mm/riscv: Use general page fault accounting Date: Fri, 26 Jun 2020 18:36:25 -0400 Message-Id: <20200626223625.199813-1-peterx@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200626223130.199227-1-peterx@redhat.com> References: <20200626223130.199227-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the general page fault accounting by passing regs into handle_mm_fault(). It naturally solve the issue of multiple page fault accounting when page fault retry happened. CC: Paul Walmsley CC: Palmer Dabbelt CC: Albert Ou CC: linux-riscv@lists.infradead.org Signed-off-by: Peter Xu --- arch/riscv/mm/fault.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 677ee1bb11ac..e796ba02b572 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -110,7 +110,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs) * make sure we exit gracefully rather than endlessly redo * the fault. */ - fault = handle_mm_fault(vma, addr, flags, NULL); + fault = handle_mm_fault(vma, addr, flags, regs); /* * If we need to retry but a fatal signal is pending, handle the @@ -128,21 +128,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs) BUG(); } - /* - * Major/minor page fault accounting is only done on the - * initial attempt. If we go through a retry, it is extremely - * likely that the page will be found in page cache at that point. - */ if (flags & FAULT_FLAG_ALLOW_RETRY) { - if (fault & VM_FAULT_MAJOR) { - tsk->maj_flt++; - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, - 1, regs, addr); - } else { - tsk->min_flt++; - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, - 1, regs, addr); - } if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; -- 2.26.2