linux-kernel - Re: Interactivity regression since v3.11 in mm/vmscan.c

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Date:	Sun, 8 Jun 2014 14:33:16 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	zhdxzx@...a.com
Cc:	Felipe Contreras <felipe.contreras@...il.com>,
	Michal Hocko <mhocko@...e.cz>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>, dhillf <dhillf@...il.com>,
	"hillf.zj" <hillf.zj@...baba-inc.com>
Subject: Re: Interactivity regression since v3.11 in mm/vmscan.c

On Sat, Jun 7, 2014 at 11:24 AM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Comments? Mel, this code is mostly attributed to you, I'd like to hear
> what you think in particular.

In the meantime, I've removed the "nr_unqueued_dirty == nr_taken"
check for congestion_wait(), since I can't see how it can possibly be
sensible, and Felipe confirmed that it fixes his interactivity issue.

Nobody commented on it, but let's see if we get reactions to the
behavior changing..

             Linus
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