Turns out the default page size is 64k on POWER!
Unfortunately, switching for me is a bit difficult right now... Because
I'm using BTRFS. BTRFS formatted for 64k page sizes won't mount on a
system configured for 4k page sizes...
I'll be able to try it out this weekend though and report back.
Thanks!
-Cameron
On 10/11/2018 08:07 PM, guoju fang wrote:
I've had a similar problem that superblock is corrupted when PAGE_SIZE
is 8KB.
On 2018/10/12 5:23, Cameron Berkenpas wrote:
It's probably important to mention that I'm currently running kernel
4.18.13.
On 10/11/2018 02:18 PM, Cameron Berkenpas wrote:
Hello,
On my POWER9 machine running Debian ppc64EL (little endian), my
caching and backing devices mostly aren't recognized between reboots.
The caching device is NEVER recognized between reboots.
The backing device will be recognized between reboots and the
filesystem will be accessible/mountable provided I have never
attached a caching device to it.
It doesn't matter if I detach the caching device before I reboot,
the backing device will not be recognized between reboots if it has
ever had a caching device attached.
The caching device after a reboot:
bcache-super-show /dev/sdxy
Invalid superblock (bad magic)
-bash: echo: write error: Invalid argument
If the caching device had been attached to the backing device, the
result is the same for the backing device.
-Cameron
