I can confirm the fix will enhance speed ~ 3 times on my machine, but fixed ZFS kernel module is not included even in current focal-updates kernel (linux-modules-5.4.0-39-generic).
I had to install zfs-dkms to get zfs kernel module of version 0.8.3-1ubuntu12.1.
I was trying to find what version will include fixed zfs module, but without success.
I can confirm the fix will enhance speed ~ 3 times on my machine, but fixed ZFS kernel module is not included even in current focal-updates kernel (linux- modules- 5.4.0-39- generic) .
I had to install zfs-dkms to get zfs kernel module of version 0.8.3-1ubuntu12.1.
I was trying to find what version will include fixed zfs module, but without success.