From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f176.google.com (mail-pl1-f176.google.com [209.85.214.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8035767B72 for ; Thu, 14 Dec 2023 17:59:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="vrLEmrPh" Received: by mail-pl1-f176.google.com with SMTP id d9443c01a7336-1cc79f73e58so3435ad.1 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=lists.linux.dev; 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=vrLEmrPhzFeS6HA6QpBRU1jVZDUXE1ejz4madxke2CwOR0j5dHM70cggJh9f4O62wm MddIo4fXTktwKXtZORBMxUx7leykNAjK8lqtonty1YoXRG+ICpUqRQtxTjWESV3wmXA2 056kktH8Y+1amsUcxRLUEnogcbU/m3YM1iv6zPUQviqmD1ziJn0geljNy6iVrHxcnLAp 9BEJx1Jq1le/+hQzg2P5EklNjw9o3H0D2sPMNSaeKdWuOzc2Pw5agnV+xo6U0u4s2qSj sC7VKY23tKnozp4arpS2MeBc1tLYN1H7++N35IeoptIISVJT91nTqi5tWv40BPmS8E1U 2lzg== 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=OoDAJCwnASlOCpVZ5arzZK1J7Z2CVY9BVPQUzJe1ErV9NCVZPmu9pADz5zzzvwQe7e BVv50FMBA3y8J6kTdTG769ajj0Y2bWGzM7FPudT0CMHgY56dpNdqDb9TZdoJt/O1fEMf 6mkEcbZQ2hj1YO24Y4dqxrRqs9E9a24hAFOvonEJ1epTSLSGPuARX2rUqKDD5G8y3dqr Lxj1XOp57hexq4JSCxJu2wPJH9s0LeS/IIyFkL3CHnhj6e43zNSMR+3a7e3ZBbUvRQPX OeaHCLaD0uqmhVqAdhdTbHDkMIuNmjxMqbKdBxKHDl7FVxfQY6kZADryC5Ovx3qPNelY AMgQ== X-Gm-Message-State: AOJu0YwJnOOnel+FAuBibc4Nq6ai21V8WHV/5CaFQNLGRcgzKF4BhBRL lVZOap9wdTv/VbGASAKFbPsxkQ== 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-sunxi@lists.linux.dev 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