linux-kernel - Re: boot warnings due to swap: make each swap partition have one address

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Date:	Tue, 29 Jan 2013 10:56:12 -0500
From:	Valdis.Kletnieks@...edu
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Shaohua Li <shli@...nel.org>, Sasha Levin <sasha.levin@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Shaohua Li <shli@...ionio.com>, Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan@...nel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: boot warnings due to swap: make each swap partition have one address_space

On Sun, 27 Jan 2013 13:40:40 -0800, Hugh Dickins said:

> My reservations so far would be: how many installations actually have
> more than one swap area, so is it a good tradeoff to add more overhead
> to help those at the (slight) expense of everyone else?  The increasingly
> ugly page_mapping() worries me, and the static array of swapper_spaces
> annoys me a little.

Right now, probably few.  But the number may go up a lot if the whole
'zram-for-swapspace' thing catches on and/or ships in a distro...

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