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4 commits

Author SHA1 Message Date
Jaegeuk Kim
351f4fba84 f2fs: add f2fs_destroy_trace_ios to free radix tree 
This patch removes radix tree after finishing tracing IOs.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2015-01-09 17:02:28 -08:00
Jaegeuk Kim
c05086506f f2fs: add spin_lock to cover radix operations in IO tracer 
This patch adds spin_lock to cover radix tree operations in IO tracer.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2015-01-09 17:02:28 -08:00
Jaegeuk Kim
0e689d0369 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>
 2015-01-09 17:02:24 -08:00
Jaegeuk Kim
63f92ddc8a f2fs: add f2fs_io_tracer support 
This patch adds:
 o initial trace.c and trace.h with skeleton functions
 o Kconfig and Makefile to activate this feature

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 2015-01-09 17:02:24 -08:00