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=-9.8 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 CCC42C433E5 for ; Tue, 7 Jul 2020 22:50:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9524207BB for ; Tue, 7 Jul 2020 22:50:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ImD3ESzV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729673AbgGGWut (ORCPT ); Tue, 7 Jul 2020 18:50:49 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:35504 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729623AbgGGWup (ORCPT ); Tue, 7 Jul 2020 18:50:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1594162243; 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=8f5TTLJDyENYlbFehaNnbtlaq4/fY2SMNvjmVOggAGU=; b=ImD3ESzVboT0XXGM/ZffdZ/RhP+Ed+wAvDdzDDfoUQW7du/fKrTlivTzeIZsmeXzGKsd8x MOjKWz+pCbf3imVKMvYNLKB17EQRIOLWkldznljD29nuxWracuoLfjtUUXGbtZ0ez/bIdw hxfaRHAPXlc0PzcaANm3S+TTKD/L1Mk= Received: from mail-qt1-f200.google.com (mail-qt1-f200.google.com [209.85.160.200]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-3-CSQwenk7ODKYQCm8Qu8ZvA-1; Tue, 07 Jul 2020 18:50:39 -0400 X-MC-Unique: CSQwenk7ODKYQCm8Qu8ZvA-1 Received: by mail-qt1-f200.google.com with SMTP id u93so31777445qtd.8 for ; Tue, 07 Jul 2020 15:50:39 -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=8f5TTLJDyENYlbFehaNnbtlaq4/fY2SMNvjmVOggAGU=; b=PumjTmkwLUup3ZZV1qzF7nJZLR4YFJ65/IaBu1byvkWoWLIb4Fs++ikri4ax7gHJtR Rxt9BBfzD+2/8vi0ob9/E3NZpDo1gFS8UX7xCDx8rLAeIFxyk0ymXUjqI7rM8wkRSDMn 3H9SUu1uqQHS1jdh9PXsXyoBeavQrJbVOFAElBpKQn8sh1bEDpPxOSuVc6lwcxcSDoyI Y/tYzxlhcaVbbLpmqocYkomSfmUIDWrk0a8SxNxyrJYIKnW+SLwiZDSIOzWQ9B0E/E4b XqGOEue0GyIZr7XXRiGnutq0OmPNg2ql59QxpQSRA2PWE2wevGj3mtriMgdHsliopLxY Qddw== X-Gm-Message-State: AOAM530dnK6UAxalcizTWa6wFOqjuuRZNs4YbzcK3dgk7dPxlYofldT/ RavcHNT9O26zAYzxHhxMF2y3I1O9gmsJ3Fqyhtr3fyQyRseo9nn6rhRkz+F+T1ksg8TfOm9m39F FiHyVd4qzFV7Loci+grps85h/ X-Received: by 2002:a05:6214:949:: with SMTP id dn9mr51711864qvb.116.1594162239228; Tue, 07 Jul 2020 15:50:39 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxYnZ/sBwn9kw3lX9BrDVhoNgmUHTzKr+RCjgXjVMxWi/R7wstbktVvXocMev9XoXXGqSRu1Q== X-Received: by 2002:a05:6214:949:: with SMTP id dn9mr51711848qvb.116.1594162238945; Tue, 07 Jul 2020 15:50:38 -0700 (PDT) Received: from xz-x1.redhat.com ([2607:9880:19c0:32::2]) by smtp.gmail.com with ESMTPSA id j16sm26267642qtp.92.2020.07.07.15.50.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jul 2020 15:50:38 -0700 (PDT) From: Peter Xu To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Gerald Schaefer , Linus Torvalds , peterx@redhat.com, Andrew Morton , Will Deacon , Andrea Arcangeli , David Rientjes , John Hubbard , Michael Ellerman , Geert Uytterhoeven , linux-m68k@lists.linux-m68k.org Subject: [PATCH v5 09/25] mm/m68k: Use general page fault accounting Date: Tue, 7 Jul 2020 18:50:05 -0400 Message-Id: <20200707225021.200906-10-peterx@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200707225021.200906-1-peterx@redhat.com> References: <20200707225021.200906-1-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. Add the missing PERF_COUNT_SW_PAGE_FAULTS perf events too. Note, the other two perf events (PERF_COUNT_SW_PAGE_FAULTS_[MAJ|MIN]) were done in handle_mm_fault(). CC: Geert Uytterhoeven CC: linux-m68k@lists.linux-m68k.org Signed-off-by: Peter Xu --- arch/m68k/mm/fault.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c index 08b35a318ebe..795f483b1050 100644 --- a/arch/m68k/mm/fault.c +++ b/arch/m68k/mm/fault.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -84,6 +85,8 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, if (user_mode(regs)) flags |= FAULT_FLAG_USER; + + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); retry: mmap_read_lock(mm); @@ -134,7 +137,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, * the fault. */ - fault = handle_mm_fault(vma, address, flags, NULL); + fault = handle_mm_fault(vma, address, flags, regs); pr_debug("handle_mm_fault returns %x\n", fault); if (fault_signal_pending(fault, regs)) @@ -150,16 +153,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, 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) - current->maj_flt++; - else - current->min_flt++; if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; -- 2.26.2