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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 9 Sep 2016 08:31:27 -0700
Message-ID: <CA+55aFxcP_ydi9KCXmMQe5tv5GXw2QmTvnCQBM7ZjEuRgKiR4g@mail.gmail.com>
Subject: Re: [RFC PATCH 0/4] Reduce tree_lock contention during swap and
 reclaim of a single file v1
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Sender: owner-linux-mm@kvack.org
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To: Mel Gorman <mgorman@techsingularity.net>
Cc: LKML <linux-kernel@vger.kernel.org>, Linux-MM <linux-mm@kvack.org>, Dave Chinner <david@fromorbit.com>, Ying Huang <ying.huang@intel.com>, Michal Hocko <mhocko@kernel.org>

On Fri, Sep 9, 2016 at 2:59 AM, Mel Gorman <mgorman@techsingularity.net> wrote:
>
> The progression of this series has been unsatisfactory.

Yeah, I have to say that I particularly don't like patch #1. It's some
rather nasty complexity for dubious gains, and holding the lock for
longer times might have downsides.

And the numbers seem to not necessarily be in favor of patch #3
either, which I would have otherwise been predisposed to like (ie it
looks fairly targeted and not very complex).

#2 seems trivially correct but largely irrelevant.

So I think this series is one of those "we need to find that it makes
a big positive impact" to make sense.

              Linus

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