From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Tue, 27 Jan 2015 01:41:23 +0000 (-0800)
Subject: f2fs: introduce a batched trim
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~98^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bba681cbb231920a786cd7303462fb2632af6f36;p=pandora-kernel.git

f2fs: introduce a batched trim

This patch introduces a batched trimming feature, which submits split discard
commands.

This is to avoid long latency due to huge trim commands.
If fstrim was triggered ranging from 0 to the end of device, we should lock
all the checkpoint-related mutexes, resulting in very long latency.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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