linux-kernel - [PATCH 0/2] mm: do not call frontswap

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Message-Id: <1351372847-13625-1-git-send-email-cesarb@cesarb.net>
Date:	Sat, 27 Oct 2012 19:20:45 -0200
From:	Cesar Eduardo Barros <cesarb@...arb.net>
To:	linux-mm@...ck.org
Cc:	linux-kernel@...r.kernel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Cesar Eduardo Barros <cesarb@...arb.net>
Subject: [PATCH 0/2] mm: do not call frontswap_init() during swapoff

The call to frontswap_init() was added in a place where it is called not
only from sys_swapon, but also from sys_swapoff. This pair of patches
fixes that.

The first patch moves the acquisition of swap_lock from enable_swap_info
to two separate helpers, one for sys_swapon and one for sys_swapoff. As
a bonus, it also makes the code for sys_swapoff less subtle.

The second patch moves the call to frontswap_init() from the common code
to the helper used only by sys_swapon.

Compile-tested only, but should be safe.

Cesar Eduardo Barros (2):
  mm: refactor reinsert of swap_info in sys_swapoff
  mm: do not call frontswap_init() during swapoff

 mm/swapfile.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

-- 
1.7.11.7

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