[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH] xen/arm: Allow setting the number of CPUs to activate at runtime
Hi, On 30/05/2022 10:09, Bertrand Marquis wrote: On 23 May 2022, at 10:13, Michal Orzel <Michal.Orzel@xxxxxxx> wrote: Introduce a command line parameter "maxcpus" on Arm to allow adjusting the number of CPUs to activate. Currently the limit is defined by the config option CONFIG_NR_CPUS. Such parameter already exists on x86. Define a parameter "maxcpus" and a corresponding static variable max_cpus in Arm smpboot.c. Modify function smp_get_max_cpus to take max_cpus as a limit and to return proper unsigned int instead of int. Take the opportunity to remove redundant variable cpus from start_xen function and to directly assign the return value from smp_get_max_cpus to nr_cpu_ids (global variable in Xen used to store the number of CPUs actually activated). Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>With the warning added in the documentation (which is ok to do on commit): Reviewed-by: Bertrand Marquis <bertrand.marquis@xxxxxxx> I have committed it with the update in the documentation. Cheers, -- Julien Grall
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