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| author | Wu Fengguang <fengguang.wu@intel.com> | 2010-12-01 17:33:37 -0600 |
|---|---|---|
| committer | Wu Fengguang <fengguang.wu@intel.com> | 2011-06-08 08:25:23 +0800 |
| commit | 251d6a471c831e22880b3c146bb4556ddfb1dc82 (patch) | |
| tree | 5ea61b9153866eda9f4164bf316c03786e1a7840 /lib | |
| parent | 846d5a091b0506b75489577cde27f39b37a192a4 (diff) | |
| download | linux-3.10-251d6a471c831e22880b3c146bb4556ddfb1dc82.tar.gz linux-3.10-251d6a471c831e22880b3c146bb4556ddfb1dc82.tar.bz2 linux-3.10-251d6a471c831e22880b3c146bb4556ddfb1dc82.zip | |
writeback: trace event writeback_single_inode
It is valuable to know how the dirty inodes are iterated and their IO size.
"writeback_single_inode: bdi 8:0: ino=134246746 state=I_DIRTY_SYNC|I_SYNC age=414 index=0 to_write=1024 wrote=0"
- "state" reflects inode->i_state at the end of writeback_single_inode()
- "index" reflects mapping->writeback_index after the ->writepages() call
- "to_write" is the wbc->nr_to_write at entrance of writeback_single_inode()
- "wrote" is the number of pages actually written
v2: add trace event writeback_single_inode_requeue as proposed by Dave.
CC: Dave Chinner <david@fromorbit.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions