Re: [PATCH 4/4] lockdep: make MAX_LOCK_DEPTH configurable from Kconfig

[Peter Zijlstra]

On Wed, Sep 27, 2017 at 02:42:20PM -0700, Govindarajulu Varadarajan wrote:
> Make MAX_LOCK_DEPTH configurable. It is set to 48 right now. Number of
> VFs under a PCI pf bus can exceed 48 and this disables lockdep.
> 
> lockdep currently allows max of 63 held_locks.

But why a config knob? Why not just raise the number to 64
unconditionally? And is that sufficient; you only state 48 is
insufficient, you don't actually state the VF limit.