On Sun, May 21, 2017 at 08:31:47PM +0200, Thomas Gleixner wrote:
> On Fri, 19 May 2017, Christoph Hellwig wrote:
> > - /* Stabilize the cpumasks */
> > - get_online_cpus();
>
> How is that protected against physical CPU hotplug? Physical CPU hotplug
> manipulates the present mask.
It does
On Fri, 19 May 2017, Christoph Hellwig wrote:
> - /* Stabilize the cpumasks */
> - get_online_cpus();
How is that protected against physical CPU hotplug? Physical CPU hotplug
manipulates the present mask.
> - nodes = get_nodes_in_cpumask(cpu_online_mask, );
> + nodes =
Currently we only assign spread vectors to online CPUs, which ties the
IRQ mapping to the currently online devices and doesn't deal nicely with
the fact that CPUs could come and go rapidly due to e.g. power management.
Instead assign vectors to all present CPUs to avoid this churn.
