linux-kernel - Re: [LKP] [mm] 721c21c17ab: +11.7% will-it-scale.per_thread

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Date:	Tue, 3 Feb 2015 10:27:46 +0000
From:	Will Deacon <will.deacon@....com>
To:	Huang Ying <ying.huang@...ux.intel.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: Re: [LKP] [mm] 721c21c17ab: +11.7% will-it-scale.per_thread_ops

On Tue, Feb 03, 2015 at 07:45:04AM +0000, Huang Ying wrote:
> FYI, we noticed the below changes on
> 
> commit 721c21c17ab958abf19a8fc611c3bd4743680e38 ("mm: mmu_gather: use
> tlb->end != 0 only for TLB invalidation")

Is this delta relative to the previous commit, or something else? The
commit in question restored some 3.18 behaviour on task exit (namely
doing a fullmm TLB flush), so it would be interesting to know if you
see the same change against 3.18.

Will
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