From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="db3UtXdY" Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6757F122 for ; Thu, 14 Dec 2023 09:59:59 -0800 (PST) Received: by mail-pl1-x631.google.com with SMTP id d9443c01a7336-1d0b40bb704so6025ad.0 for ; Thu, 14 Dec 2023 09:59:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702576799; x=1703181599; darn=vger.kernel.org; h=mime-version:references:message-id:in-reply-to:subject:cc:to:from :date:from:to:cc:subject:date:message-id:reply-to; bh=PZ9x6kLcBYiEdBJWGUfxINmlIVM3g2sEltrcooCIdH0=; b=db3UtXdY8aBQieI3huxs2sGIoL44TLlJEKvRJ9MvuvbUxHU3JVbetHrCOko0PxaYDd SQzKmE6QChugPbwUT8s/lxkPf0UkAvt13KrFtZEXZX4rMQQ650K0dr3DZdsC3NRgB36i pBHhOCpCZ3YMqMvG6wGirj87knntUgZv78I8GG5CeRAJcy1ANUplXaVb8+Y5jpz0dz+l xnzL/RKfGWhpmAsEroo7eEdvUqC+IZ2x6mUqhBBS8m17QwES3aBg/C28cZhbTAzVNMwY udJ6WpTCp61nq+q2eb+sqa8Fv5xeOHLW8EmjI0dSzAwryZO613j/HxQP66J/x51yjoM5 64oQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702576799; x=1703181599; h=mime-version:references:message-id:in-reply-to:subject:cc:to:from :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=PZ9x6kLcBYiEdBJWGUfxINmlIVM3g2sEltrcooCIdH0=; b=FB7J5jhZZqAsE0R4eQqA0YmRVL7d+ogwq+jPi4YH4KEaBOtB6vzOMK8AcRflmeDRHc EJSPhmESOpcFIzsddEguLviwoAbQejRsPCcvN7qlNWgKs3o+uLf1vklj1Q8fHuEaZSHV rkq4J0ThDODoOTrAr1gW8APyOqEE2K4f/hD98QKiaP4qFLFVtaw1kxc2d21HUR/yKyQ7 G9XY9t4rdaNadyXv+nOvA8K8qUYw3c2zGLUNsAOM4Vb/qbS+GLRtfEvnZ2/XlcEIzw6O 05OtjPjnFklHosj3uE8C/oHSkWTZc8Hqxan1n7jlL6mJvSNbPDmFQjiyjpl1QyYj0okL kEWA== X-Gm-Message-State: AOJu0YycsvtdO9pni/BgMxZmR5MLnTR1X03qnZPYYXX5HyOZtHEwOyzW 4Xw5hHNscITnSwLOlxxzHhV+Mw== X-Google-Smtp-Source: AGHT+IH5RplbwvbCKQv+ptuR7ZWj127uLmsE7SQkvEwRe0Gbuexa/KME9clMyovQW6MkVTsfPUZxog== X-Received: by 2002:a17:902:d2d2:b0:1d3:7d54:be3d with SMTP id n18-20020a170902d2d200b001d37d54be3dmr49997plc.6.1702576798577; Thu, 14 Dec 2023 09:59:58 -0800 (PST) Received: from [2620:0:1008:15:740b:4c24:bdb6:a42a] ([2620:0:1008:15:740b:4c24:bdb6:a42a]) by smtp.gmail.com with ESMTPSA id y18-20020a170902b49200b001cfc2e0a82fsm12675679plr.26.2023.12.14.09.59.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Dec 2023 09:59:58 -0800 (PST) Date: Thu, 14 Dec 2023 09:59:57 -0800 (PST) From: David Rientjes To: Pasha Tatashin cc: akpm@linux-foundation.org, alim.akhtar@samsung.com, alyssa@rosenzweig.io, asahi@lists.linux.dev, baolu.lu@linux.intel.com, bhelgaas@google.com, cgroups@vger.kernel.org, corbet@lwn.net, david@redhat.com, dwmw2@infradead.org, hannes@cmpxchg.org, heiko@sntech.de, iommu@lists.linux.dev, jernej.skrabec@gmail.com, jonathanh@nvidia.com, joro@8bytes.org, krzysztof.kozlowski@linaro.org, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, lizefan.x@bytedance.com, marcan@marcan.st, mhiramat@kernel.org, m.szyprowski@samsung.com, paulmck@kernel.org, rdunlap@infradead.org, robin.murphy@arm.com, samuel@sholland.org, suravee.suthikulpanit@amd.com, sven@svenpeter.dev, thierry.reding@gmail.com, tj@kernel.org, tomas.mudrunka@gmail.com, vdumpa@nvidia.com, wens@csie.org, will@kernel.org, yu-cheng.yu@intel.com Subject: Re: [PATCH v2 09/10] iommu: observability of the IOMMU allocations In-Reply-To: <20231130201504.2322355-10-pasha.tatashin@soleen.com> Message-ID: <88519685-abfb-e2f8-38b4-d94340b40d1d@google.com> References: <20231130201504.2322355-1-pasha.tatashin@soleen.com> <20231130201504.2322355-10-pasha.tatashin@soleen.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Thu, 30 Nov 2023, Pasha Tatashin wrote: > Add NR_IOMMU_PAGES into node_stat_item that counts number of pages > that are allocated by the IOMMU subsystem. > > The allocations can be view per-node via: > /sys/devices/system/node/nodeN/vmstat. > > For example: > > $ grep iommu /sys/devices/system/node/node*/vmstat > /sys/devices/system/node/node0/vmstat:nr_iommu_pages 106025 > /sys/devices/system/node/node1/vmstat:nr_iommu_pages 3464 > > The value is in page-count, therefore, in the above example > the iommu allocations amount to ~428M. > > Signed-off-by: Pasha Tatashin Acked-by: David Rientjes