From 0886196ca8810c5b1f5097b71c4bc0df40b10208 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Sun, 8 Jan 2023 17:44:24 +0200 Subject: 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 Signed-off-by: Yishai Hadas Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20230108154427.32609-4-yishaih@nvidia.com Signed-off-by: Alex Williamson --- drivers/vfio/virqfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/vfio/virqfd.c') diff --git a/drivers/vfio/virqfd.c b/drivers/vfio/virqfd.c index 497a17b37865..29c564b7a6e1 100644 --- a/drivers/vfio/virqfd.c +++ b/drivers/vfio/virqfd.c @@ -112,7 +112,7 @@ int vfio_virqfd_enable(void *opaque, int ret = 0; __poll_t events; - virqfd = kzalloc(sizeof(*virqfd), GFP_KERNEL); + virqfd = kzalloc(sizeof(*virqfd), GFP_KERNEL_ACCOUNT); if (!virqfd) return -ENOMEM; -- cgit