Re: [bitfolk] Apache handing on Ubuntu 16.04

Hi Luke, On Sat, Dec 01, 2018 at 09:28:32PM +0000, Luke Taylor wrote: Is only apache affected? i.e. are other things on the VPS responsive during this time? When you say "the server is restarted", do you mean the apache server, or the entire VPS? There is definitely a bug in Xen which was exposed by the most recent security patches; that bug most probably only affects 64-bit guest and can be avoided by upgrading your kernel. As it involves memory corruption it's hard to predict how that would manifest itself. If there is a kernel upgrade available then I recommend you take it. Do you currently have a file /sys/devices/system/cpu/vulnerabilities/l1tf ? Is there a kernel upgrade available? If you upgrade, does that file appear? As far as I am aware, on Ubuntu 16.04 package linux-image-generic version 4.4.0.133.139 contains the L1TF fix. If that doesn't help, I can move your VPS to a test host where the problematic patch is disabled, and that would then rule out whether it is that. If your problem persists while your VPS is on that host then it would be something I'm currently unaware of and would be suspicious of something inside your VPS. But the timing is suspicious. Cheers, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting