Maybe I'm missing something here. I tested this out on an Eoan server:

$ dmesg | grep ZFS
[   10.821332] ZFS: Loaded module v0.8.1-1ubuntu14.3, ZFS pool version 5000, 
ZFS filesystem version 5

$ uname -a
Linux eaon-amd64 5.3.0-42-generic #34-Ubuntu SMP Fri Feb 28 05:49:40 UTC 2020 
x86_64 x86_64 x86_64 GNU/Linux

I added a zfs_arc_max setting into the zfs.conf:

cat /etc/modprobe.d/zfs.conf 
options zfs zfs_arc_max=50331648

rebooted and I get:

cat /sys/module/zfs/parameters/zfs_arc_max 
50331648

So this is setting the L1ARC size as I expected. Can you explain further
the issue you are seeing?



** Changed in: zfs-linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: zfs-linux (Ubuntu)
       Status: New => Incomplete

** Changed in: zfs-linux (Ubuntu)
     Assignee: (unassigned) => Colin Ian King (colin-king)

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https://bugs.launchpad.net/bugs/1854480

Title:
  zfs_arc_max not working anymore in zfs 0.8.1

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