From: Sergey Senozhatsky senozhatsky@chromium.org
commit ea86f3defd55f141a44146e66cbf8ffb683d60da upstream.
We observed that some of virtio_gpu_object_shmem_init() allocations can be rather costly - order 6 - which can be difficult to fulfill under memory pressure conditions. Switch to kvmalloc_array() in virtio_gpu_object_shmem_init() and let the kernel vmalloc the entries array.
Signed-off-by: Sergey Senozhatsky senozhatsky@chromium.org Link: http://patchwork.freedesktop.org/patch/msgid/20201105014744.1662226-1-senozh... Signed-off-by: Gerd Hoffmann kraxel@redhat.com Signed-off-by: Doug Horn doughorn@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/virtio/virtgpu_object.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -172,8 +172,9 @@ static int virtio_gpu_object_shmem_init( *nents = shmem->pages->orig_nents; }
- *ents = kmalloc_array(*nents, sizeof(struct virtio_gpu_mem_entry), - GFP_KERNEL); + *ents = kvmalloc_array(*nents, + sizeof(struct virtio_gpu_mem_entry), + GFP_KERNEL); if (!(*ents)) { DRM_ERROR("failed to allocate ent list\n"); return -ENOMEM;