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1 month agoA normal copy consists of a program reading from one file and writing to another. There is no way for the filesystem to do a reflink in that case, it just sees that the program is reading and writing stuff. In order to do a reflink, the program must tell the filesystem what data should be “copied” to where using FICLONE or FICLONERANGE. Though some programs will do that by default if possible nowadays when copying files or when moving files between different subvolumes on the same partition, including the Coreutils cp, mv and install commands and some GUI file managers.
Though that’s not where you would use HDMI. I would argue for TV:s, 4k is generally enough, and HDMI 2.1 already has enough bandwidth for 4k 120 Hz 12 bit-per-color uncompressed.
But DisplayPort, yeah, that could use a bit more.