diff options
| author | Tejun Heo <tj@kernel.org> | 2013-01-12 01:06:37 +0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-01-14 18:00:36 +0400 |
| commit | 9fb0a7da0c528d9bd49b597aa63b1fe2216c7203 (patch) | |
| tree | 146b065709010fd41f4a48e8a494b65b965fc0e8 /Documentation/irqflags-tracing.txt | |
| parent | 5305cb830834549b9203ad4d009ad5483c5e293f (diff) | |
| download | linux-9fb0a7da0c528d9bd49b597aa63b1fe2216c7203.tar.xz | |
writeback: add more tracepoints
Add tracepoints for page dirtying, writeback_single_inode start, inode
dirtying and writeback. For the latter two inode events, a pair of
events are defined to denote start and end of the operations (the
starting one has _start suffix and the one w/o suffix happens after
the operation is complete). These inode ops are FS specific and can
be non-trivial and having enclosing tracepoints is useful for external
tracers.
This is part of tracepoint additions to improve visiblity into
dirtying / writeback operations for io tracer and userland.
v2: writeback_dirty_inode[_start] TPs may be called for files on
pseudo FSes w/ unregistered bdi. Check whether bdi->dev is %NULL
before dereferencing.
v3: buffer dirtying moved to a block TP.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'Documentation/irqflags-tracing.txt')
0 files changed, 0 insertions, 0 deletions