Bug 472769

Summary: Akonadi causes persistent 100 % iowait load on one CPU core
Product: [Frameworks and Libraries] Akonadi Reporter: Tobias Leupold <tl>
Component: generalAssignee: kdepim bugs <pim-bugs-null>
Status: RESOLVED NOT A BUG    
Severity: normal CC: carl, tl
Priority: NOR    
Version First Reported In: 5.23.3   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Tobias Leupold 2023-07-29 10:12:30 UTC 
Using Akonadi 5.23.3, I get a persistent iowait load of 100 % on one CPU core. I see this on two different machines running this version on Artix Linux. Stopping the Akonadi server makes the load drop to 0 %. Deleting the ~/.local/share/akonadi cache and rebuilding it did not solve the problem. The iowait load stays at 100 % for one core all the time.

I don't see this on my Gentoo machine running Akonadi 5.23.2, and also not on another Artix machine running this version.

I'd happily provide all debugging information you may need to track this down, if you tell me how to acquire them ;-)
Comment 1 Tobias Leupold 2023-07-29 19:50:02 UTC 
Sorry for the noise, folks – this is actually a Kernel bug.

Happens with 6.4.6, does not happen with 6.4.2. Should be
https://lore.kernel.org/all/CAMEGJJ3SjWdJFwzB+sz79ojWqAAMULa2CFAas0tv+JJLJMwoGQ@mail.gmail.com/