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* [PATCH 0/3] eldie generated code for folded p4d/pud
@ 2019-10-09 22:26 Vineet.Gupta1
  2019-10-09 22:26 ` [PATCH 1/3] asm-generic/tlb: stub out pud_free_tlb() if __PAGETABLE_PUD_FOLDED Vineet.Gupta1
                   ` (4 more replies)
  0 siblings, 5 replies; 9+ messages in thread
From: Vineet.Gupta1 @ 2019-10-09 22:26 UTC (permalink / raw)
  To: linux-snps-arc

Hi,

This series elides extraneous generate code for folded p4d/pud.
This came up when trying to remove __ARCH_USE_5LEVEL_HACK from ARC port.
The code saving are not a while lot, but still worthwhile IMHO.

bloat-o-meter2 vmlinux-A-baseline vmlinux-E-elide-p?d_clear_bad
add/remove: 0/2 grow/shrink: 0/1 up/down: 0/-146 (-146)
function                                     old     new   delta
p4d_clear_bad                                  2       -      -2
pud_clear_bad                                 20       -     -20
free_pgd_range                               546     422    -124
Total: Before=4137148, After=4137002, chg -1.000000%

Thx,
-Vineet

Vineet Gupta (3):
  asm-generic/tlb: stub out pud_free_tlb() if __PAGETABLE_PUD_FOLDED ...
  asm-generic/tlb: stub out p4d_free_tlb() if __PAGETABLE_P4D_FOLDED ...
  asm-generic/mm: stub out p{4,d}d_clear_bad() if
    __PAGETABLE_P{4,u}D_FOLDED

 include/asm-generic/4level-fixup.h |  2 --
 include/asm-generic/5level-fixup.h |  2 --
 include/asm-generic/pgtable.h      | 11 +++++++++++
 include/asm-generic/tlb.h          |  8 ++++++--
 mm/pgtable-generic.c               |  4 ++++
 5 files changed, 21 insertions(+), 6 deletions(-)

-- 
2.20.1

^ permalink raw reply	[flat|nested] 9+ messages in thread

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Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-09 22:26 [PATCH 0/3] eldie generated code for folded p4d/pud Vineet.Gupta1
2019-10-09 22:26 ` [PATCH 1/3] asm-generic/tlb: stub out pud_free_tlb() if __PAGETABLE_PUD_FOLDED Vineet.Gupta1
2019-10-09 22:26 ` [PATCH 2/3] asm-generic/tlb: stub out p4d_free_tlb() if __PAGETABLE_P4D_FOLDED Vineet.Gupta1
2019-10-09 22:26 ` [PATCH 3/3] asm-generic/mm: stub out p{4, d}d_clear_bad() if __PAGETABLE_P{4, u}D_FOLDED Vineet.Gupta1
2019-10-10  7:29 ` [PATCH 0/3] eldie generated code for folded p4d/pud peterz
2019-10-10  8:56 ` kirill.shutemov
2019-10-10 20:05   ` vineetg76
2019-10-11 12:19     ` kirill
2019-10-11 22:38       ` [RFC] asm-generic/tlb: stub out pmd_free_tlb() if __PAGETABLE_PMD_FOLDED Vineet.Gupta1

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