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,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 CF683C433E4 for ; Tue, 7 Jul 2020 22:50:41 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9F7B02075B for ; Tue, 7 Jul 2020 22:50:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ZYRKLOMz"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="goe9ljKA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9F7B02075B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=kh8Mw7UOIJx6NCkZW3kFIarks1uWwBpBqS1V6xTvqnU=; b=ZYRKLOMzq/AaSnmpv4Yu3O1Pc 8hNC/ZdQYe6qfZNvSINL4tJyQWkwF5r4Djy4HhcVneum1991+C4QmyvwC1NrGTt1nuyIcKBFqd7/Z ulj/K7h/1SILjcDAf2rm9FoQM2GAo6zeEHEdU8v6nRt17lAtLJbLD9gYrnlONPJnoUdj7Rhzxcz0e ilgtLHDs/KNIa1Wz7EF+mXMlHwEKIXStWsxHQkQ6g+TSbS2qWvcBafmlHY7F2mbw2qNV4QhxLvwi8 uAMbLssXBSVOQEqb1mvWTrAR/jGCxerymtZP4yR2MS7IUqpb58iUOUn3M6+U6SuSgoy/Axv8C9CWV 53bxxOPjg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jswQC-00066z-VQ; Tue, 07 Jul 2020 22:50:40 +0000 Received: from us-smtp-1.mimecast.com ([205.139.110.61] helo=us-smtp-delivery-1.mimecast.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jswQ5-00063i-KS for linux-snps-arc@lists.infradead.org; Tue, 07 Jul 2020 22:50:35 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1594162231; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7D381D/H14FHe4T4c1JYQQxnwU06uKAee3rsUSJokIU=; b=goe9ljKAaVBX5Gyrh8c72NwgsNkWBq7TX8U7anj5xGtnju+0eNPB4DVoVe2ZRGeL+ljUWO SOf7pI/X8ZZWSQDWn3Mt1LO63WscbExp2dWu4scf5sUvLDrz9twucDzsTMg/hSW24i9toN 61ETZyhknQtasRw5SZncfdB7JuMZcy0= Received: from mail-qv1-f71.google.com (mail-qv1-f71.google.com [209.85.219.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-250-q42HQX1xOt2Ni9Gqw0t2Lg-1; Tue, 07 Jul 2020 18:50:30 -0400 X-MC-Unique: q42HQX1xOt2Ni9Gqw0t2Lg-1 Received: by mail-qv1-f71.google.com with SMTP id 59so28108568qvb.4 for ; Tue, 07 Jul 2020 15:50:29 -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=7D381D/H14FHe4T4c1JYQQxnwU06uKAee3rsUSJokIU=; b=Rcin0vtfuBbvQi0U/OFU20SMvUPUadJsJPmPBVmkxQITmdcdNE3GL+Nq7wGPMhBKCE 8fTB7Q+GPTiK80lXARy7jJQ7MtUelwac5LC18MwSC1ROKOjIo8GiK48LuIuy4G8ulg0e T4DB6/YO6KNuDlFX6LYUsZauU1ESNfULkkyXkbZl0HYDI3so6nIS+h8EtlIYq5ghvGTb GH7Z0SIjhCJSu8SlDXZSp+Mujwb+W4ca/V4syQtCoBhtD0hBn16PfC9Ly26W3dA/kkis vxgWOEszvQvZz2sjIk2sJjqsv3iYjkm+CYtYJwX/zqtGEBakocKqctt29f+Gf2kzdOT2 EP4g== X-Gm-Message-State: AOAM531KSua/m5K8wrkL+gFJ8n0e4rR14zAPLnaFCS9u42QZDlWNQMTR 2XInQR7AzAmNdjWzcnPq5GbwZdDaMV0V191kleNQrJpYHGyxyYOF538sUHIdTPk1wih5mh1jniM y8M9hkFn51EdjRCfSL0UN3mBtMTC/084C X-Received: by 2002:a37:957:: with SMTP id 84mr47901152qkj.392.1594162229536; Tue, 07 Jul 2020 15:50:29 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw8Qe2aOe1IpWrTkBCeJI7Q41I9z0vTh86xMOYiLo7vcyohVA6pGslr3yB/GvOVaXZ0OVm2lw== X-Received: by 2002:a37:957:: with SMTP id 84mr47901134qkj.392.1594162229298; Tue, 07 Jul 2020 15:50:29 -0700 (PDT) Received: from xz-x1.redhat.com ([2607:9880:19c0:32::2]) by smtp.gmail.com with ESMTPSA id j16sm26267642qtp.92.2020.07.07.15.50.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jul 2020 15:50:28 -0700 (PDT) From: Peter Xu To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v5 03/25] mm/arc: Use general page fault accounting Date: Tue, 7 Jul 2020 18:49:59 -0400 Message-Id: <20200707225021.200906-4-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 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=peterx@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200707_185033_751229_89393B07 X-CRM114-Status: UNSURE ( 9.60 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrea Arcangeli , John Hubbard , Linus Torvalds , peterx@redhat.com, Vineet Gupta , Michael Ellerman , David Rientjes , Andrew Morton , linux-snps-arc@lists.infradead.org, Will Deacon , Gerald Schaefer Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.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. Fix PERF_COUNT_SW_PAGE_FAULTS perf event manually for page fault retries, by moving it before taking mmap_sem. CC: Vineet Gupta CC: linux-snps-arc@lists.infradead.org Signed-off-by: Peter Xu --- arch/arc/mm/fault.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index 587dea524e6b..f5657cb68e4f 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -105,6 +105,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs) if (write) flags |= FAULT_FLAG_WRITE; + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); retry: mmap_read_lock(mm); @@ -130,7 +131,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs) goto bad_area; } - fault = handle_mm_fault(vma, address, flags, NULL); + fault = handle_mm_fault(vma, address, flags, regs); /* Quick path to respond to signals */ if (fault_signal_pending(fault, regs)) { @@ -155,22 +156,9 @@ void do_page_fault(unsigned long address, struct pt_regs *regs) * Major/minor page fault accounting * (in case of retry we only land here once) */ - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); - - if (likely(!(fault & VM_FAULT_ERROR))) { - if (fault & VM_FAULT_MAJOR) { - tsk->maj_flt++; - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, - regs, address); - } else { - tsk->min_flt++; - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, - regs, address); - } - + if (likely(!(fault & VM_FAULT_ERROR))) /* Normal return path: fault Handled Gracefully */ return; - } if (!user_mode(regs)) goto no_context; -- 2.26.2 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc