Received: by 2002:a05:6a10:17d3:0:0:0:0 with SMTP id hz19csp3146680pxb;
        Tue, 20 Apr 2021 01:23:42 -0700 (PDT)
X-Google-Smtp-Source: ABdhPJz1erNP4zgb8JWDUX648A8i8RFbUKi5sJvvi1IfUQNTt+wnH4u66Psid9X9ShuMBPQ6xIh4
X-Received: by 2002:a17:902:bd4a:b029:ec:7b39:9738 with SMTP id b10-20020a170902bd4ab02900ec7b399738mr21545401plx.59.1618907022452;
        Tue, 20 Apr 2021 01:23:42 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1618907022; cv=none;
        d=google.com; s=arc-20160816;
        b=Wc5Yqm/p4doiBSg6PHvBh43+1EVAnweopdQvbG6WwpCFXhVaAU7kAfjKLz51iP96nS
         ulfoDF1bQLsKRQ8xhLDgPCiat5O6QTrVGabZBcJHsoyPcgSUq9VypRITt668JcSisrSr
         P/uYDzmPNaAOtG5g2UDvhzx4U/o0MaaRmmTE4UQhLhLb0EeMtuFmH/mJ73xu/Hp3gkRP
         /j3Clo86JpzQ3gx/Yrx8MpZrBEMyZMhYALpD82Q8rW8aae4gMOSTtiF0L5ToqPGcsAO8
         txm+iAHyUv3zUMtZHOpFfHC9nBAKFoa5ZX0og4Zg7KdBCyjDSrb+dgrt+YKorU1EeU9U
         dtkQ==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:content-transfer-encoding:mime-version
         :message-id:date:subject:to:from;
        bh=aMdS2YFd0Kh6aP4TaC0ZMZyJ+sMV1Twu7oSq5yAxyM8=;
        b=pX2K5RPQZo0H5wSowqB01KZiW1xpV9mlahb6uOfJ2sWo3EglWhxvdMOk0dwfT1vkGm
         HCki9gdEWPuF/UGG5tb+yvPp76m+mqlEV5LFziQJmZp9DhEWJPa4kFlRjKYn+GpQnuQP
         VcTEHPV1mwNNfBWo48cpUTqtj5ATDfCf6N4td/3O5nMJIu+tVnVkFXQNmMqke2QbzoZA
         GF1eHYBHwbJ7eXPlm2mc9gu/mGNb31HYYV3aLdqAxOQp/zd011m+t36ktQkXwCdMSYTK
         MUFgXvZWJGi/pZA2JZderfAKPYJsvYtjY+XdlpFi7Dirq2KW30XLllifgVZ8n9hNjJSz
         Ml4w==
ARC-Authentication-Results: i=1; mx.google.com;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org;
       dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=sony.com
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18])
        by mx.google.com with ESMTP id x3si2440472pjp.37.2021.04.20.01.23.30;
        Tue, 20 Apr 2021 01:23:42 -0700 (PDT)
Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Authentication-Results: mx.google.com;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org;
       dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=sony.com
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S230359AbhDTIXO convert rfc822-to-8bit (ORCPT
        <rfc822;lists.md@gmail.com> + 99 others);
        Tue, 20 Apr 2021 04:23:14 -0400
Received: from jptosegrel01.sonyericsson.com ([124.215.201.71]:7221 "EHLO
        JPTOSEGREL01.sonyericsson.com" rhost-flags-OK-OK-OK-OK)
        by vger.kernel.org with ESMTP id S230082AbhDTIXN (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 20 Apr 2021 04:23:13 -0400
From:   Peter Enderborg <peter.enderborg@sony.com>
To:     <linux-kernel@vger.kernel.org>, <linux-fsdevel@vger.kernel.org>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>,
        Alexey Dobriyan <adobriyan@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Muchun Song <songmuchun@bytedance.com>,
        Roman Gushchin <guro@fb.com>,
        Shakeel Butt <shakeelb@google.com>,
        Michal Hocko <mhocko@suse.com>, NeilBrown <neilb@suse.de>,
        Sami Tolvanen <samitolvanen@google.com>,
        Mike Rapoport <rppt@kernel.org>, <linux-media@vger.kernel.org>,
        <dri-devel@lists.freedesktop.org>,
        <linaro-mm-sig@lists.linaro.org>,
        Matthew Wilcox <willy@infradead.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Randy Dunlap <rdunlap@infradead.org>,
        Kees Cook <keescook@chromium.org>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Alexey Gladkov <gladkov.alexey@gmail.com>,
        Feng Tang <feng.tang@intel.com>, <linux-doc@vger.kernel.org>
Subject: [PATCH 0/2 V6]Add dma-buf counter
Date:   Tue, 20 Apr 2021 10:22:18 +0200
Message-ID: <20210420082220.7402-1-peter.enderborg@sony.com>
X-Mailer: git-send-email 2.17.1
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8BIT
X-SEG-SpamProfiler-Analysis: v=2.3 cv=DLnxHBFb c=1 sm=1 tr=0 a=9drRLWArJOlETflmpfiyCA==:117 a=IkcTkHD0fZMA:10 a=3YhXtTcJ-WEA:10 a=QyXUC8HyAAAA:8 a=6icRsfec0oETIK1Ck8AA:9 a=QEXdDO2ut3YA:10 a=pHzHmUro8NiASowvMSCR:22 a=Ew2E2A-JSTLzCXPT_086:22
X-SEG-SpamProfiler-Score: 0
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

The dma-buf counter is a metric for mapped memory used by it's clients.
It is a shared buffer that is typically used for interprocess communication
or process to hardware communication. In android we used to have ION,. but
it is now replaced with dma-buf. ION had some overview metrics that was similar.



V1
	initial version. Add dma-buf counter

V2
	Fix build depencendy error suggested by Matthew Wilcox
	Extent commit message sugged by Köning

V3
	Change variable and function names.

V4
	Fix function name in code doc
	Reported-by: kernel test robot <lkp@intel.com>

V5
	Removed EXPORT_SYMBOL_GPL suggested by Muchun Song

V6
	Made it a patch set, Adding a addional patch for
	printing dma-buf counter in show_mem.
	Suggested by Michal Hocko.