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| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-01-23 16:35:58 -0400 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-01-25 11:52:04 +0100 |
| commit | e787a38e31e57c35682d363e71891956d804f7e3 (patch) | |
| tree | 5d9e079706d7a8423d0e40ab853fb2e8c8480ace /drivers/iommu | |
| parent | 96d57808808595d33f98cef5b3c0f75dde6a72f2 (diff) | |
| download | linux-e787a38e31e57c35682d363e71891956d804f7e3.tar.gz linux-e787a38e31e57c35682d363e71891956d804f7e3.tar.bz2 linux-e787a38e31e57c35682d363e71891956d804f7e3.zip | |
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommufd/pages.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c index 22cc3bb0c6c5..f8d92c9bb65b 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; |