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[Fix] Use a correct device when creating OptionalCUDAGuard #2583

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Merged
merged 1 commit into from
Jan 26, 2024
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[Fix] Use a correct device when creating OptionalCUDAGuard #2583

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2 changes: 1 addition & 1 deletion csrc/cache_kernels.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,7 @@ void swap_blocks(
char *dst_ptr = static_cast<char*>(dst.data_ptr());

const int64_t block_size_in_bytes = src.element_size() * src[0].numel();
const at::cuda::OptionalCUDAGuard device_guard(src_device);
const at::cuda::OptionalCUDAGuard device_guard(src_device.is_cuda() ? src_device : dst_device);
const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
// NOTE(woosuk): This can be slow if the number of blocks is large.
for (const auto& pair : block_mapping) {
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