在 2024/7/18 11:08, Christoph Hellwig 写道:
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On Thu, Jul 18, 2024 at 09:51:39AM +0800, Huan Yang wrote:
Yes, actually, if dma-buf want's to copy_file_range from a file, it need
change something in vfs_copy_file_range:
No, it doesn't. copy_file_range is specifically designed to copy inside
a single file system as already mentioned. The generic offload for
OK, got it. Thanks to point this.
copying between arbitrary FDs is splice and the sendfile convenience
wrapper around it
