aboutsummaryrefslogtreecommitdiff
path: root/include/trace
diff options
context:
space:
mode:
authorCurt Wohlgemuth <curtw@google.com>2011-10-07 21:54:10 -0600
committerWu Fengguang <fengguang.wu@intel.com>2011-10-31 00:33:36 +0800
commit0e175a1835ffc979e55787774e58ec79e41957d7 (patch)
tree6ec4b65a8de4e9d1c12d26a1079079ed81d79450 /include/trace
parentad4e38dd6a33bb3a4882c487d7abe621e583b982 (diff)
downloadlinux-linaro-stable-0e175a1835ffc979e55787774e58ec79e41957d7.tar.gz
writeback: Add a 'reason' to wb_writeback_work
This creates a new 'reason' field in a wb_writeback_work structure, which unambiguously identifies who initiates writeback activity. A 'wb_reason' enumeration has been added to writeback.h, to enumerate the possible reasons. The 'writeback_work_class' and tracepoint event class and 'writeback_queue_io' tracepoints are updated to include the symbolic 'reason' in all trace events. And the 'writeback_inodes_sbXXX' family of routines has had a wb_stats parameter added to them, so callers can specify why writeback is being started. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/writeback.h14
1 files changed, 10 insertions, 4 deletions
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 1261db3916cc..b99caa8b780c 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -34,6 +34,7 @@ DECLARE_EVENT_CLASS(writeback_work_class,
__field(int, for_kupdate)
__field(int, range_cyclic)
__field(int, for_background)
+ __field(int, reason)
),
TP_fast_assign(
strncpy(__entry->name, dev_name(bdi->dev), 32);
@@ -43,16 +44,18 @@ DECLARE_EVENT_CLASS(writeback_work_class,
__entry->for_kupdate = work->for_kupdate;
__entry->range_cyclic = work->range_cyclic;
__entry->for_background = work->for_background;
+ __entry->reason = work->reason;
),
TP_printk("bdi %s: sb_dev %d:%d nr_pages=%ld sync_mode=%d "
- "kupdate=%d range_cyclic=%d background=%d",
+ "kupdate=%d range_cyclic=%d background=%d reason=%s",
__entry->name,
MAJOR(__entry->sb_dev), MINOR(__entry->sb_dev),
__entry->nr_pages,
__entry->sync_mode,
__entry->for_kupdate,
__entry->range_cyclic,
- __entry->for_background
+ __entry->for_background,
+ wb_reason_name[__entry->reason]
)
);
#define DEFINE_WRITEBACK_WORK_EVENT(name) \
@@ -165,6 +168,7 @@ TRACE_EVENT(writeback_queue_io,
__field(unsigned long, older)
__field(long, age)
__field(int, moved)
+ __field(int, reason)
),
TP_fast_assign(
unsigned long *older_than_this = work->older_than_this;
@@ -173,12 +177,14 @@ TRACE_EVENT(writeback_queue_io,
__entry->age = older_than_this ?
(jiffies - *older_than_this) * 1000 / HZ : -1;
__entry->moved = moved;
+ __entry->reason = work->reason;
),
- TP_printk("bdi %s: older=%lu age=%ld enqueue=%d",
+ TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s",
__entry->name,
__entry->older, /* older_than_this in jiffies */
__entry->age, /* older_than_this in relative milliseconds */
- __entry->moved)
+ __entry->moved,
+ wb_reason_name[__entry->reason])
);
TRACE_EVENT(global_dirty_state,