From: Chao Yu <chao2.yu@samsung.com>
Date: Thu, 5 Feb 2015 09:55:51 +0000 (+0800)
Subject: f2fs: add a mount option for rb-tree extent cache
X-Git-Tag: omap-for-v4.2/o2_dc~90^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8967215954a50947fbd9c2996232548bf6dd9062;p=pandora-kernel.git

f2fs: add a mount option for rb-tree extent cache

This patch adds a mount option 'extent_cache' in f2fs.

It is try to use a rb-tree based extent cache to cache more mapping information
with less memory if this option is set, otherwise we will use the original one
extent info cache.

Suggested-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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