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List:       linux-btrfs
Subject:    Re: kworker/u32:5+btrfs-delalloc using 100% CPU
From:       Tomasz Chmielewski <mangoo () wpkg ! org>
Date:       2021-12-03 8:16:59
Message-ID: 93111e00ad2e42738d65d426f82ad17f () wpkg ! org
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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
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