Nicholas Piggin 5709f7cfd8 powerpc/mm/slice: implement a slice mask cache ... Calculating the slice mask can become a signifcant overhead for get_unmapped_area. This patch adds a struct slice_mask for each page size in the mm_context, and keeps these in synch with the slices psize arrays and slb_addr_limit. On Book3S/64 this adds 288 bytes to the mm_context_t for the slice mask caches. On POWER8, this increases vfork+exec+exit performance by 9.9% and reduces time to mmap+munmap a 64kB page by 28%. Reduces time to mmap+munmap by about 10% on 8xx. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-03-13 23:43:06 +11:00
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32	powerpc/mm: Fix crashes with 16G huge pages	2018-02-13 22:37:47 +11:00
64	powerpc/mm/slice: implement a slice mask cache	2018-03-13 23:43:06 +11:00
pgalloc.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
pgtable.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00