include/trace/events/readahead.h

Source file repositories/reference/linux-study-clean/include/trace/events/readahead.h

File Facts

System
Linux kernel
Corpus path
include/trace/events/readahead.h
Extension
.h
Size
3680 bytes
Lines
133
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

#undef TRACE_SYSTEM
#define TRACE_SYSTEM readahead

#if !defined(_TRACE_FILEMAP_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_READAHEAD_H

#include <linux/types.h>
#include <linux/tracepoint.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/pagemap.h>

TRACE_EVENT(page_cache_ra_unbounded,
	TP_PROTO(struct inode *inode, pgoff_t index, unsigned long nr_to_read,
		 unsigned long lookahead_size),

	TP_ARGS(inode, index, nr_to_read, lookahead_size),

	TP_STRUCT__entry(
		__field(u64, i_ino)
		__field(dev_t, s_dev)
		__field(pgoff_t, index)
		__field(unsigned long, nr_to_read)
		__field(unsigned long, lookahead_size)
	),

	TP_fast_assign(
		__entry->i_ino = inode->i_ino;
		__entry->s_dev = inode->i_sb->s_dev;
		__entry->index = index;
		__entry->nr_to_read = nr_to_read;
		__entry->lookahead_size = lookahead_size;
	),

	TP_printk(
		"dev=%d:%d ino=%llx index=%lu nr_to_read=%lu lookahead_size=%lu",
		MAJOR(__entry->s_dev), MINOR(__entry->s_dev), __entry->i_ino,
		__entry->index, __entry->nr_to_read, __entry->lookahead_size
	)
);

TRACE_EVENT(page_cache_ra_order,
	TP_PROTO(struct inode *inode, pgoff_t index, struct file_ra_state *ra),

	TP_ARGS(inode, index, ra),

	TP_STRUCT__entry(
		__field(u64, i_ino)
		__field(dev_t, s_dev)
		__field(pgoff_t, index)
		__field(unsigned int, order)
		__field(unsigned int, size)
		__field(unsigned int, async_size)
		__field(unsigned int, ra_pages)
	),

	TP_fast_assign(
		__entry->i_ino = inode->i_ino;
		__entry->s_dev = inode->i_sb->s_dev;
		__entry->index = index;
		__entry->order = ra->order;
		__entry->size = ra->size;
		__entry->async_size = ra->async_size;
		__entry->ra_pages = ra->ra_pages;
	),

	TP_printk(
		"dev=%d:%d ino=%llx index=%lu order=%u size=%u async_size=%u ra_pages=%u",
		MAJOR(__entry->s_dev), MINOR(__entry->s_dev), __entry->i_ino,
		__entry->index, __entry->order, __entry->size,
		__entry->async_size, __entry->ra_pages
	)
);

DECLARE_EVENT_CLASS(page_cache_ra_op,
	TP_PROTO(struct inode *inode, pgoff_t index, struct file_ra_state *ra,
		 unsigned long req_count),

	TP_ARGS(inode, index, ra, req_count),

	TP_STRUCT__entry(
		__field(u64, i_ino)
		__field(loff_t, prev_pos)
		__field(pgoff_t, index)
		__field(unsigned long, req_count)
		__field(dev_t, s_dev)
		__field(unsigned int, order)
		__field(unsigned int, size)
		__field(unsigned int, async_size)
		__field(unsigned int, ra_pages)

Annotation

Implementation Notes