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| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-01-08 17:44:24 +0200 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2023-01-23 11:26:29 -0700 |
| commit | 0886196ca8810c5b1f5097b71c4bc0df40b10208 (patch) | |
| tree | ce3b10ea0f808d9a692bcc057b18fd84031fdd97 /drivers/vfio/pci/vfio_pci_core.c | |
| parent | 83ff6095ecf8bafd095a921a2267227519f510f8 (diff) | |
| download | linux-0886196ca8810c5b1f5097b71c4bc0df40b10208.tar.gz linux-0886196ca8810c5b1f5097b71c4bc0df40b10208.tar.bz2 linux-0886196ca8810c5b1f5097b71c4bc0df40b10208.zip | |
vfio: Use GFP_KERNEL_ACCOUNT for userspace persistent allocations
Use GFP_KERNEL_ACCOUNT for userspace persistent allocations.
The GFP_KERNEL_ACCOUNT option lets the memory allocator know that this
is untrusted allocation triggered from userspace and should be a subject
of kmem accounting, and as such it is controlled by the cgroup
mechanism.
The way to find the relevant allocations was for example to look at the
close_device function and trace back all the kfrees to their
allocations.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20230108154427.32609-4-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_core.c')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_core.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 26a541cc64d1..a6492a25ff6a 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -144,7 +144,8 @@ static void vfio_pci_probe_mmaps(struct vfio_pci_core_device *vdev) * of the exclusive page in case that hot-add * device's bar is assigned into it. */ - dummy_res = kzalloc(sizeof(*dummy_res), GFP_KERNEL); + dummy_res = + kzalloc(sizeof(*dummy_res), GFP_KERNEL_ACCOUNT); if (dummy_res == NULL) goto no_mmap; @@ -863,7 +864,7 @@ int vfio_pci_core_register_dev_region(struct vfio_pci_core_device *vdev, region = krealloc(vdev->region, (vdev->num_regions + 1) * sizeof(*region), - GFP_KERNEL); + GFP_KERNEL_ACCOUNT); if (!region) return -ENOMEM; @@ -1644,7 +1645,7 @@ static int __vfio_pci_add_vma(struct vfio_pci_core_device *vdev, { struct vfio_pci_mmap_vma *mmap_vma; - mmap_vma = kmalloc(sizeof(*mmap_vma), GFP_KERNEL); + mmap_vma = kmalloc(sizeof(*mmap_vma), GFP_KERNEL_ACCOUNT); if (!mmap_vma) return -ENOMEM; |