From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Thu, 18 Dec 2014 03:51:57 +0000 (-0800)
Subject: f2fs: add key functions for f2fs_io_tracer
X-Git-Tag: fixes-v4.0-rc1~114^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e689d036952a6018ed5f5c1aee7697f5c57cea1;p=pandora-kernel.git

f2fs: add key functions for f2fs_io_tracer

This patch adds two key functions to trace process ids and IOs.
The basic idea is to
1. remain process ids, pids, in page->private.
2. show pids in IO traces.

So, later we can retrieve process information according to IO traces.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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