Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [PATCH] smp: Add bootcpus parameter to boot subset of CPUs | Date | Mon, 26 Oct 2020 20:04:25 +0100 |
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On Mon, Oct 26 2020 at 10:08, psodagud wrote: > Based on my understanding with maxcpus option provides, maximum no of > CPUs are brough up during the device boot up. There is a different case, > in which we want to restrict which CPUs to be brough up.
Again: What for? Why?
> On a system with 8 cpus, if we set maxcpus as 3, cpu0, cpu1, and cpu2 > are brough up during the bootup. For example, if we want to bring > core0, core3 and core4 current maxcpu(as 3) setting would not help us. > On some platform we want the flexibility on which CPUs to bring up > during the device bootup. bootcpus command line is helping to bring > specific CPUs and these patches are working downstream.
A lot of patches work downstream by some definition of work. But that does not make an argument to bring them upstream.
Thanks,
tglx
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