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Re: [PATCH 1/2] genirq/affinity: assign vectors to all possible CPUs




On Fri, 12 Jan 2018, Ming Lei wrote:

> From: Christoph Hellwig <hch@xxxxxx>
> 
> Currently we assign managed interrupt vectors to all present CPUs.  This
> works fine for systems were we only online/offline CPUs.  But in case of
> systems that support physical CPU hotplug (or the virtualized version of
> it) this means the additional CPUs covered for in the ACPI tables or on
> the command line are not catered for.  To fix this we'd either need to
> introduce new hotplug CPU states just for this case, or we can start
> assining vectors to possible but not present CPUs.
> 
> Reported-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> Tested-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> Tested-by: Stefan Haberland <sth@xxxxxxxxxxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

FWIW, Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>