Thread (101 messages) 101 messages, 12 authors, 2012-11-28

Re: [PATCH, v2] mm, numa: Turn 4K pte NUMA faults into effective hugepage ones

From: Ingo Molnar <mingo@kernel.org>
Date: 2012-11-21 09:34:39
Also in: lkml

* David Rientjes [off-list ref] wrote:
Ok, this is significantly better, it almost cut the regression 
in half on my system. [...]
The other half still seems to be related to the emulation faults 
that I fixed in the other patch:
     0.49%  [kernel]          [k] page_fault                                               
     0.06%  [kernel]          [k] emulate_vsyscall                                         
Plus TLB flush costs:
     0.13%  [kernel]          [k] generic_smp_call_function_interrupt
     0.08%  [kernel]          [k] flush_tlb_func
for which you should try the third patch I sent.

So please try all my fixes - the easiest way to do that would be 
to try the latest tip:master that has all related fixes 
integrated and send me a new perf top output - most page fault 
and TLB flush overhead should be gone from the profile.

Thanks,

	Ingo

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