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=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=no 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 ACD9DC433E0 for ; Wed, 12 Aug 2020 01:38:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 83F652054F for ; Wed, 12 Aug 2020 01:38:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597196285; bh=aBwKVZFnDmCW2ICE6rrUjHhAnJB5tB/XlrzaDfvAUgE=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=oitKs8cOfynk7StC2HA0NfMZJ6QM20DnAD5Z2h4cTdN9EowleSjlDRWhwjIwUfPOl v6/423VrZUS7GBtGID5QyxDrCJU1Lh7oftgsL/FcKvnHAhnt/UttZEgpOp9ohSHxK1 TRpdY3k9VaswQcRzXTmGwZWBIPRUMpBq3mWFwWCc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726488AbgHLBiF (ORCPT ); Tue, 11 Aug 2020 21:38:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:40210 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726235AbgHLBiF (ORCPT ); Tue, 11 Aug 2020 21:38:05 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5FA1A20658; Wed, 12 Aug 2020 01:38:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597196284; bh=aBwKVZFnDmCW2ICE6rrUjHhAnJB5tB/XlrzaDfvAUgE=; h=Date:From:To:Subject:In-Reply-To:From; b=l7+rEFFJUZCI5rpliH/6RgXUHv1RHUxpIbc0ChwIDKDyvhnNMLmOvJ7OH1vKmMsK7 z7kYS8rg1sW1YTf/csONpk3SatApMGB0sguZmBoFMXokb5LD7dVZe6aNGe89FReh5O /VkhC6XpyU3JGcnNzBdwtqfXtqXPFOsqvzcf3TFE= Date: Tue, 11 Aug 2020 18:38:03 -0700 From: Andrew Morton To: akpm@linux-foundation.org, bcain@codeaurora.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, peterx@redhat.com, torvalds@linux-foundation.org Subject: [patch 147/165] mm/hexagon: use general page fault accounting Message-ID: <20200812013803.h-k1vyv8W%akpm@linux-foundation.org> In-Reply-To: <20200811182949.e12ae9a472e3b5e27e16ad6c@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Peter Xu Subject: mm/hexagon: use general page fault accounting 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(). Link: http://lkml.kernel.org/r/20200707225021.200906-8-peterx@redhat.com Signed-off-by: Peter Xu Acked-by: Brian Cain Signed-off-by: Andrew Morton --- arch/hexagon/mm/vm_fault.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) --- a/arch/hexagon/mm/vm_fault.c~mm-hexagon-use-general-page-fault-accounting +++ a/arch/hexagon/mm/vm_fault.c @@ -18,6 +18,7 @@ #include #include #include +#include /* * Decode of hardware exception sends us to one of several @@ -53,6 +54,8 @@ void do_page_fault(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); vma = find_vma(mm, address); @@ -88,7 +91,7 @@ good_area: break; } - fault = handle_mm_fault(vma, address, flags, NULL); + fault = handle_mm_fault(vma, address, flags, regs); if (fault_signal_pending(fault, regs)) return; @@ -96,10 +99,6 @@ good_area: /* The most common case -- we are done. */ if (likely(!(fault & VM_FAULT_ERROR))) { 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; goto retry; _