linux-kernel - Re: [PATCH 0/5] mm: poison critical mm/ structs

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Message-ID: <20141002151302.GA15348@redhat.com>
Date:	Thu, 2 Oct 2014 11:13:02 -0400
From:	Dave Jones <davej@...hat.com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, mgorman@...e.de
Subject: Re: [PATCH 0/5] mm: poison critical mm/ structs

On Thu, Oct 02, 2014 at 02:23:08AM -0700, Hugh Dickins wrote:

 > I think these patches are fine for investigating whatever is the
 > problem currently afflicting you and mm under trinity; but we all
 > have our temporary debugging patches, I don't think all deserve
 > preservation in everyone else's kernel, that amounts to far more
 > clutter than any are worth.

One problem with keeping things like this in -mm (or other non-Linus tree)
is that they bit-rot quickly, and become a pain to apply, especially if
they are perpetually on top of other changes in -mm.

I looked at trying these patches on Linus' tree when Sasha posted them,
but lost motivation when I realized they needed other bits of -mm too.

It may be that after Andrews 3.18+ mega-merge things would be simpler,
but I have a feeling it wouldn't be long before the situation would
arise again.

	Dave

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