sparc64: Reduce TLB flushes during hugepte changes

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During hugepage map/unmap, TSB and TLB flushes are currently
issued at every PAGE_SIZE'd boundary which is unnecessary.
We now issue the flush at REAL_HPAGE_SIZE boundaries only.

Without this patch workloads which unmap a large hugepage
backed VMA region get CPU lockups due to excessive TLB
flush calls.

Orabug: 22365539, 22643230, 22995196

Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Nitin Gupta 2016-03-30 11:17:13 -07:00 • committed by David S. Miller

parent b1ac6b7b40

commit 24e49ee3d7

6 changed files with 97 additions and 51 deletions

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43

arch/sparc/include/asm/pgtable_64.h

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3

arch/sparc/include/asm/tlbflush_64.h

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33

arch/sparc/mm/hugetlbpage.c

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12

arch/sparc/mm/init_64.c

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25

arch/sparc/mm/tlb.c

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32

arch/sparc/mm/tsb.c

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