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> Subject: Re: [PATCH v4 1/4] fs: allow cross-FS copy_file_range for memory
> file with direct I/O
>
> On Tue, Jun 3,
On Tue, Jun 3, 2025 at 11:53 AM wangtao wrote:
>
> Memory files can optimize copy performance via copy_file_range callbacks:
> -Compared to mmap&read: reduces GUP (get_user_pages) overhead
> -Compared to sendfile/splice: eliminates one memory copy
> -Supports dma-buf direct I/O zero-copy implement
Memory files can optimize copy performance via copy_file_range callbacks:
-Compared to mmap&read: reduces GUP (get_user_pages) overhead
-Compared to sendfile/splice: eliminates one memory copy
-Supports dma-buf direct I/O zero-copy implementation
Suggested by: Christian König
Suggested by: Amir G
