x86/tlb: replace INVALIDATE_TLB_VECTOR by CALL_FUNCTION_VECTOR

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There are 32 INVALIDATE_TLB_VECTOR now in kernel. That is quite big
amount of vector in IDT. But it is still not enough, since modern x86
sever has more cpu number. That still causes heavy lock contention
in TLB flushing.

The patch using generic smp call function to replace it. That saved 32
vector number in IDT, and resolved the lock contention in TLB
flushing on large system.

In the NHM EX machine 4P * 8cores * HT = 64 CPUs, hackbench pthread
has 3% performance increase.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Link: http://lkml.kernel.org/r/1340845344-27557-9-git-send-email-alex.shi@intel.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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This commit is contained in:

Alex Shi 2012-06-28 09:02:23 +08:00 • committed by H. Peter Anvin

parent 611ae8e3f5

commit 52aec3308d

5 changed files with 47 additions and 306 deletions

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9

arch/x86/include/asm/entry_arch.h

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11

arch/x86/include/asm/irq_vectors.h

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18

arch/x86/kernel/entry_64.S

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73

arch/x86/kernel/irqinit.c

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238

arch/x86/mm/tlb.c

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