SubmissionEntry to prepare
is the file descriptor to sync
the starting byte of the file range to be synchronized
the length of the range to be synchronized, in bytes
the flags for the command.
sync_file_range(2) for the general description of the related system call.
Note: available from Linux 5.2
Prepares sync_file_range(2) operation.
Sync a file segment with disk, permits fine control when synchronizing the open file referred to by the file descriptor fd with disk.
If len is 0, then all bytes from offset through to the end of file are synchronized.