linux-kernel - Re: [bisected] pre-3.16 regression on open() scalability

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Message-ID: <alpine.DEB.2.11.1406201019430.10810@gentwo.org>
Date:	Fri, 20 Jun 2014 10:20:36 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
cc:	josh@...htriplett.org, Andi Kleen <ak@...ux.intel.com>,
	Dave Hansen <dave.hansen@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Chen, Tim C" <tim.c.chen@...el.com>
Subject: Re: [bisected] pre-3.16 regression on open() scalability

On Thu, 19 Jun 2014, Paul E. McKenney wrote:

> I am putting together patches based on Eric Dumazet's suggestion and on a
> variant of the above approach.  However, I do expect the distros to starve
> to death between those two bales of hay.  But perhaps the actual patches
> will inspire a bit of light to go with this thread's heat and smoke.

Yep. Note that the large systems are only a few and the smaller systems
are many. You are penalizing the overwhelming majority for support of a
few systems.

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