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List:       linux-btrfs
Subject:    Re: kworker/u32:5+btrfs-delalloc using 100% CPU
From:       Johannes Thumshirn <Johannes.Thumshirn () wdc ! com>
Date:       2021-12-03 8:09:48
Message-ID: PH0PR04MB7416465C59F5F339FA87AB839B6A9 () PH0PR04MB7416 ! namprd04 ! prod ! outlook ! com
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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?

Thanks,
	Johannes
=
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