Re: [PATCH v3] x86/cpu: Allow higher NR_CPUS values

2013-11-07 Thread Josh Boyer
On Thu, Nov 07, 2013 at 10:15:55AM +0100, Ingo Molnar wrote: > > * Josh Boyer wrote: > > > The current range for SMP configs is 2 - 512 CPUs, or a full 4096 in the > > case of MAXSMP. There are machines that have 1024 CPUs in them today > > and configuring a kernel for that means you are forc

Re: [PATCH v3] x86/cpu: Allow higher NR_CPUS values

2013-11-07 Thread Ingo Molnar
* Josh Boyer wrote: > The current range for SMP configs is 2 - 512 CPUs, or a full 4096 in the > case of MAXSMP. There are machines that have 1024 CPUs in them today > and configuring a kernel for that means you are forced to set MAXSMP. > This adds additional unnecessary overhead. While t

[PATCH v3] x86/cpu: Allow higher NR_CPUS values

2013-11-06 Thread Josh Boyer
The current range for SMP configs is 2 - 512 CPUs, or a full 4096 in the case of MAXSMP. There are machines that have 1024 CPUs in them today and configuring a kernel for that means you are forced to set MAXSMP. This adds additional unnecessary overhead. While that overhead might be considered t