Re: kworker/u32:5+btrfs-delalloc using 100% CPU

Tomasz Chmielewski
2021-12-03T08:17:06Z

On 2021-12-03 09:09, Johannes Thumshirn wrote:
> On 03/12/2021 00:23, Tomasz Chmielewski wrote:
>> 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