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| author | Tejun Heo <tj@kernel.org> | 2013-01-11 13:06:36 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-01-14 15:00:36 +0100 |
| commit | 5305cb830834549b9203ad4d009ad5483c5e293f (patch) | |
| tree | 9781e0181cb1f3c8f6fa2c5ad2de445333383b87 /include/trace | |
| parent | f0059afd3e6e7aa1a0ffc23468b74c43d47660b8 (diff) | |
| download | linux-3.10-5305cb830834549b9203ad4d009ad5483c5e293f.tar.gz linux-3.10-5305cb830834549b9203ad4d009ad5483c5e293f.tar.bz2 linux-3.10-5305cb830834549b9203ad4d009ad5483c5e293f.zip | |
block: add block_{touch|dirty}_buffer tracepoint
The former is triggered from touch_buffer() and the latter
mark_buffer_dirty().
This is part of tracepoint additions to improve visiblity into
dirtying / writeback operations for io tracer and userland.
v2: Transformed writeback_dirty_buffer to block_dirty_buffer and made
it share TP definition with block_touch_buffer.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/block.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/trace/events/block.h b/include/trace/events/block.h index b408f518a81..9961726523d 100644 --- a/include/trace/events/block.h +++ b/include/trace/events/block.h @@ -6,10 +6,61 @@ #include <linux/blktrace_api.h> #include <linux/blkdev.h> +#include <linux/buffer_head.h> #include <linux/tracepoint.h> #define RWBS_LEN 8 +DECLARE_EVENT_CLASS(block_buffer, + + TP_PROTO(struct buffer_head *bh), + + TP_ARGS(bh), + + TP_STRUCT__entry ( + __field( dev_t, dev ) + __field( sector_t, sector ) + __field( size_t, size ) + ), + + TP_fast_assign( + __entry->dev = bh->b_bdev->bd_dev; + __entry->sector = bh->b_blocknr; + __entry->size = bh->b_size; + ), + + TP_printk("%d,%d sector=%llu size=%zu", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->sector, __entry->size + ) +); + +/** + * block_touch_buffer - mark a buffer accessed + * @bh: buffer_head being touched + * + * Called from touch_buffer(). + */ +DEFINE_EVENT(block_buffer, block_touch_buffer, + + TP_PROTO(struct buffer_head *bh), + + TP_ARGS(bh) +); + +/** + * block_dirty_buffer - mark a buffer dirty + * @bh: buffer_head being dirtied + * + * Called from mark_buffer_dirty(). + */ +DEFINE_EVENT(block_buffer, block_dirty_buffer, + + TP_PROTO(struct buffer_head *bh), + + TP_ARGS(bh) +); + DECLARE_EVENT_CLASS(block_rq_with_error, TP_PROTO(struct request_queue *q, struct request *rq), |