On 2021-12-03 09:09, Johannes Thumshirn wrote:

On 03/12/2021 00:23, Tomasz Chmielewski wrote:

quoted

On two of my servers running Linux 5.15.5 I can observe
kworker/u32:5+btrfs-delalloc process using 100% CPU.

The servers receive files with rsync and I suspect that because of 
that
process using 100% CPU, the speed is very slow, less than 1 MB/s over 
a
gigabit network.

Hi,

We're currently working on a similar hang with btrfs on zoned
block devices. Which brings me to the question, are you seeing this 
issues
on a zoned device, like an SMR drive, or on a regular device?

It's a regular HDD.


Tomasz