Re: [Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-09-13 Thread Dario Faggioli
On Wed, 2018-09-12 at 17:13 +0200, Dario Faggioli wrote: > On Thu, 2018-08-30 at 14:01 +1000, Steven Haigh wrote: > > > > Add the CPUs: > > (XEN) Adding cpu 12 to runqueue 0 > > (XEN) First cpu on runqueue, activating > > (XEN) Removing cpu 12 from runqueue 0 > > (XEN) Adding cpu 13 to runqueue 0

Re: [Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-09-12 Thread Dario Faggioli
On Thu, 2018-08-30 at 14:01 +1000, Steven Haigh wrote: > On 2018-08-29 15:49, Juergen Gross wrote: > > > > RAM placement should not matter here. As the name already suggests > > cpupools do assignment of cpus. RAM allocated will be preferred > > taken > > from a local node, but this shouldn't be m

Re: [Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-08-30 Thread Jan Beulich
>>> On 30.08.18 at 06:01, wrote: > Managed to get the same crash log when adding CPUs to Pool-1 as follows: > > Create the pool: > (XEN) Initializing Credit2 scheduler > (XEN) load_precision_shift: 18 > (XEN) load_window_shift: 30 > (XEN) underload_balance_tolerance: 0 > (XEN) overload_balanc

Re: [Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-08-30 Thread Juergen Gross
Added Dario as the scheduler's maintainer (he is on vacation this and the next week, so don't expect a fast answer). Juergen On 30/08/18 06:01, Steven Haigh wrote: > On 2018-08-29 15:49, Juergen Gross wrote: >> On 29/08/18 07:33, Steven Haigh wrote: >>> When playing with NUMA support recently, I

Re: [Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-08-29 Thread Steven Haigh
On 2018-08-29 15:49, Juergen Gross wrote: On 29/08/18 07:33, Steven Haigh wrote: When playing with NUMA support recently, I noticed a host would always hang when trying to create a cpupool for the second NUMA node in the system. I was using the following commands: # xl cpupool-create name=\"P

Re: [Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-08-28 Thread Jan Beulich
>>> On 29.08.18 at 07:33, wrote: > When playing with NUMA support recently, I noticed a host would always hang > when trying to create a cpupool for the second NUMA node in the system. > > I was using the following commands: > # xl cpupool-create name=\"Pool-1\" sched=\"credit2\ > # xl cpupool-c

Re: [Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-08-28 Thread Juergen Gross
On 29/08/18 07:33, Steven Haigh wrote: > When playing with NUMA support recently, I noticed a host would always hang > when trying to create a cpupool for the second NUMA node in the system. > > I was using the following commands: > # xl cpupool-create name=\"Pool-1\" sched=\"credit2\ > # xl cpup

[Xen-devel] RFE: Detect NUMA misconfigurations and prevent machine freezes

2018-08-28 Thread Steven Haigh
When playing with NUMA support recently, I noticed a host would always hang when trying to create a cpupool for the second NUMA node in the system. I was using the following commands: # xl cpupool-create name=\"Pool-1\" sched=\"credit2\ # xl cpupool-cpu-remove Pool-0 node:1 # xl cpupool-cpu-add P