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Date: Wed, 21 Nov 2012 10:34:31 +0100 From: Ingo Molnar <mingo@...nel.org> To: David Rientjes <rientjes@...gle.com> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Mel Gorman <mgorman@...e.de>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Paul Turner <pjt@...gle.com>, Lee Schermerhorn <Lee.Schermerhorn@...com>, Christoph Lameter <cl@...ux.com>, Rik van Riel <riel@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Andrea Arcangeli <aarcange@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, Johannes Weiner <hannes@...xchg.org>, Hugh Dickins <hughd@...gle.com> Subject: Re: [PATCH, v2] mm, numa: Turn 4K pte NUMA faults into effective hugepage ones * David Rientjes <rientjes@...gle.com> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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