Matthew Miller wrote:
> On Mon, Feb 01, 2021 at 01:24:53PM +0000, David Howells wrote:
>> Matthew Miller <mattdm@xxxxxxxxxxxxxxxxx> wrote:
>> > Plus, it's 64 bit instead of 32 bit. The 256-bit algorithms are
>> > obviously much, much slower and probably not right for a default, but
>> > should we consider making xxhash the default for Fedora Linux systems
>> > with btrfs?
>> Does this affect what's on disk?
>
> Yes; it changes the checksums stored with each block to be in the selected
> format. This can only be changed at filesystem creation time.
I guess the real question is: does it increase the required disk space or
does it only fill up bits that would otherwise be padding bits?
Kevin Kofler
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