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Fri, 6 Jan 2023 16:42:50 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::f8b0:df13:5f8d:12a]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::f8b0:df13:5f8d:12a%9]) with mapi id 15.20.5944.019; Fri, 6 Jan 2023 16:42:49 +0000 From: Jason Gunthorpe To: Lu Baolu , Joerg Roedel , Kevin Tian , Matthew Rosato , Robin Murphy Cc: Alex Williamson , ath10k@lists.infradead.org, ath11k@lists.infradead.org, Christian Borntraeger , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, linux-rdma@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, nouveau@lists.freedesktop.org, Niklas Schnelle , virtualization@lists.linux-foundation.org Subject: [PATCH 5/8] iommufd: Use GFP_KERNEL_ACCOUNT for iommu_map() Date: Fri, 6 Jan 2023 12:42:45 -0400 Message-Id: <5-v1-6e8b3997c46d+89e-iommu_map_gfp_jgg@nvidia.com> In-Reply-To: <0-v1-6e8b3997c46d+89e-iommu_map_gfp_jgg@nvidia.com> References: X-ClientProxiedBy: BL1PR13CA0105.namprd13.prod.outlook.com (2603:10b6:208:2b9::20) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|DS0PR12MB6437:EE_ X-MS-Office365-Filtering-Correlation-Id: f0cd8f24-13bf-491a-932d-08daf0050bd6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The various internal data structures already use GFP_KERNEL_ACCOUNT. However, one of the biggest consumers of kernel memory is the IOPTEs stored under the iommu_domain. Many drivers will allocate these at iommu_map() time and will trivially do the right thing if we pass in GFP_KERNEL_ACCOUNT. Signed-off-by: Jason Gunthorpe --- drivers/iommu/iommufd/pages.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c index 22cc3bb0c6c55a..f8d92c9bb65b60 100644 --- a/drivers/iommu/iommufd/pages.c +++ b/drivers/iommu/iommufd/pages.c @@ -457,7 +457,7 @@ static int batch_iommu_map_small(struct iommu_domain *domain, while (size) { rc = iommu_map(domain, iova, paddr, PAGE_SIZE, prot, - GFP_KERNEL); + GFP_KERNEL_ACCOUNT); if (rc) goto err_unmap; iova += PAGE_SIZE; @@ -502,7 +502,7 @@ static int batch_to_domain(struct pfn_batch *batch, struct iommu_domain *domain, rc = iommu_map(domain, iova, PFN_PHYS(batch->pfns[cur]) + page_offset, next_iova - iova, area->iommu_prot, - GFP_KERNEL); + GFP_KERNEL_ACCOUNT); if (rc) goto err_unmap; iova = next_iova;