[PATCH v2 10/10] powerpc/mm/slice: use the dynamic high slice size to limit bitmap operations

Nicholas Piggin npiggin at gmail.com
Wed Mar 7 14:22:32 AEDT 2018

On Wed,  7 Mar 2018 11:37:18 +1000
Nicholas Piggin <npiggin at gmail.com> wrote:

> The number of high slices a process might use now depends on its
> address space size, and what allocation address it has requested.
> This patch uses that limit throughout call chains where possible,
> rather than use the fixed SLICE_NUM_HIGH for bitmap operations.
> This saves some cost for processes that don't use very large address
> spaces.
> Perormance numbers aren't changed significantly, this may change
> with larger address spaces or different mmap access patterns that
> require more slice mask building.

Ignore this patch in the series. I didn't intend to send it.


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