Re: [PATCHv2 0/9] split page table lock for PMD tables

[Kirill A. Shutemov]

Peter Zijlstra wrote:
> >   - reuse CONFIG_SPLIT_PTLOCK_CPUS for PMD split lock;
> 
> So why is there still CONFIG_SPLIT_PTE_PTLOCK and
> CONFIG_SPLIT_PMD_PTLOCK in the series?

There is not.

We have USE_SPLIT_{PTE,PMD}_PTLOCK. We can't use split pmd lock everywhere
split pte lock is available: it requires separate enabling on arch side
and will not work on all hardware (i.e. with 2-level page table
configuration).

-- 
 Kirill A. Shutemov
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