Subject: Re: [vserver] 4.9 Kernels Hit Psand Repos
From: Ben Green <ben@bristolwireless.net>
Date: Thu, 20 Sep 2018 20:34:07 +0100

Hi Andrew,

great you got that sorted. I'll hopefully be able to be a bit more  
pro-active with the builds for Stretch, and for Buster, as we've  
decided not to roll out LXC to productions servers for this release  
cycle.

Cheers,
Ben


Quoting Andrew Ruthven <andrew.ruthven@catalyst.net.nz>:

> I decided to try the latest 4.9 kernel again tonight and I tracked down
> the performance issue I was seeing. iostat was showing one hard drive
> with utterly terribly wait times, and even running smartctl against
> that drive was epically slow (all other drives ran normally).
>
> Turns out there was a dodgy SATA cable for that drive. After swapping
> the cable, I/O on the machine is back to what it should be!
>
> At a guess something has changed in the SATA drivers between 4.1.x and
> 4.9.y and that change of behaviour triggered the issue I was observing.
>
> Ben, thank you for publishing your kernels!
>
> Cheers,
> Andrew
>