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* f2fs: add f2fs_destroy_trace_ios to free radix treeJaegeuk Kim2015-01-091-0/+2
| | | | | | This patch removes radix tree after finishing tracing IOs. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: add spin_lock to cover radix operations in IO tracerJaegeuk Kim2015-01-091-0/+2
| | | | | | This patch adds spin_lock to cover radix tree operations in IO tracer. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: add key functions for f2fs_io_tracerJaegeuk Kim2015-01-091-0/+18
| | | | | | | | | | | 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>
* f2fs: add f2fs_io_tracer supportJaegeuk Kim2015-01-091-0/+24
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>
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