From 9e094383b60066996fbc3b53891324e5d2ec858d Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Wed, 7 Jul 2010 13:24:08 +1000 Subject: writeback: Add tracing to write_cache_pages Add a trace event to the ->writepage loop in write_cache_pages to give visibility into how the ->writepage call is changing variables within the writeback control structure. Of most interest is how wbc->nr_to_write changes from call to call, especially with filesystems that write multiple pages in ->writepage. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/trace/events/writeback.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/trace/events/writeback.h') diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h index 0be26acae064..bde92e07fa4f 100644 --- a/include/trace/events/writeback.h +++ b/include/trace/events/writeback.h @@ -148,6 +148,7 @@ DEFINE_WBC_EVENT(wbc_writeback_wait); DEFINE_WBC_EVENT(wbc_balance_dirty_start); DEFINE_WBC_EVENT(wbc_balance_dirty_written); DEFINE_WBC_EVENT(wbc_balance_dirty_wait); +DEFINE_WBC_EVENT(wbc_writepage); #endif /* _TRACE_WRITEBACK_H */ -- cgit v1.2.3