Re: ZFS deadlocks/memory accounting issues

On Mon, Mar 16, 2026 at 5:30 PM Mark Millard <[email protected]> wrote:
>
>
> ZFS is documented to have the property: "This approach provides
> coherency between memory-mapped and IO access as the expense of wasted
> memory due to having two copies of the file in memory and extra overhead
> caused by the need to copy the contents between the two copies."
> (Chapter 10, page 548, last bullet item of the 2nd edition of the design
> and implementation book.)

That's not relevant in this case, because no ZFS file was mmapped().
It was only a fusefs file that was mmaped().