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iommufd: Use GFP_KERNEL_ACCOUNT for iommu_map() 

iommufd follows the same design as KVM and uses memory cgroups to limit
the amount of kernel memory a iommufd file descriptor can pin down. 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.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/5-v3-76b587fe28df+6e3-iommu_map_gfp_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jason Gunthorpe 2023-01-23 16:35:58 -04:00 committed by Joerg Roedel
parent 96d5780880
commit e787a38e31
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/iommufd/pages.c
View File

@ -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;