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drm/virtio: use kvmalloc for large allocations

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commit ea86f3defd 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-senozhatsky@chromium.org
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>
This commit is contained in:
Sergey Senozhatsky 2020-11-05 10:47:44 +09:00 committed by Greg Kroah-Hartman
parent a4b0bfbe4b
commit 63d0afae74
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/virtio/virtgpu_object.c
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@ -172,8 +172,9 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev,
*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;