[arch-general] System like glue, High IO Wait.

[Carsten Mattner]

On Sat, Apr 2, 2016 at 9:11 PM, Carsten Feuls <liste at carstenfeuls.de> wrote:
> Hello Everybody,
>
> I have some trouble with my ArchLinux Installations.
> The Systems are very unresponsive (long waiting on gui interaction).
> In Htop I can see a high CPU wait time,and a high cpu load, but in iftop no IO
> load is on the drives.
> I have these Probelem with 3 Arch Installations.
> These systems run kf5.
> All installations runs ArchLinux Stable (not testing), and the Installations
> are up to date.
> On my parents PC the problem only appear after the last update.
> I have copy the output to pastebin.
> http://pastebin.com/E4xnQKhJ
>
> For me it looks like a graphics bug.
> I have downgraded the kernel to an older version but it does not resolve the
> problem.
> Maybe anybody know something about that. Or have an larger expertise in
> investigating this bug.
>
> I use archlinux now longer than six years. I have solved much problems. But
> this bug makes me crazy..

Are you sure there was no IO?

USB drives can block the whole system for long periods
since a couple major kernel versions, similar to Windows
blocking with certain device drivers.