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| author | Steven Whitehouse <swhiteho@redhat.com> | 2011-04-18 14:18:38 +0100 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2011-04-20 09:01:58 +0100 |
| commit | c83ae9cad8776bab153a05cc466be39f14011091 (patch) | |
| tree | b8ae7e94b03e3e6d21df24ff41d466ea552b6ccb | |
| parent | 4667a0ec32867865fd4deccf834594b3ea831baf (diff) | |
| download | linux-c83ae9cad8776bab153a05cc466be39f14011091.tar.bz2 | |
GFS2: Add an AIL writeback tracepoint
Add a tracepoint for monitoring writeback of the AIL.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| -rw-r--r-- | fs/gfs2/log.c | 2 | ||||
| -rw-r--r-- | fs/gfs2/trace_gfs2.h | 28 |
2 files changed, 30 insertions, 0 deletions
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c index 03e00417061b..ad1f1887633f 100644 --- a/fs/gfs2/log.c +++ b/fs/gfs2/log.c @@ -144,6 +144,7 @@ void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc) struct list_head *head = &sdp->sd_ail1_list; struct gfs2_ail *ai; + trace_gfs2_ail_flush(sdp, wbc, 1); spin_lock(&sdp->sd_ail_lock); list_for_each_entry_reverse(ai, head, ai_list) { if (wbc->nr_to_write <= 0) @@ -151,6 +152,7 @@ void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc) gfs2_ail1_start_one(sdp, wbc, ai); /* This may drop ail lock */ } spin_unlock(&sdp->sd_ail_lock); + trace_gfs2_ail_flush(sdp, wbc, 0); } /** diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h index 9133d0aaac26..5d07609ec57d 100644 --- a/fs/gfs2/trace_gfs2.h +++ b/fs/gfs2/trace_gfs2.h @@ -10,6 +10,7 @@ #include <linux/buffer_head.h> #include <linux/dlmconstants.h> #include <linux/gfs2_ondisk.h> +#include <linux/writeback.h> #include "incore.h" #include "glock.h" @@ -320,6 +321,33 @@ TRACE_EVENT(gfs2_log_blocks, MINOR(__entry->dev), __entry->blocks) ); +/* Writing back the AIL */ +TRACE_EVENT(gfs2_ail_flush, + + TP_PROTO(const struct gfs2_sbd *sdp, const struct writeback_control *wbc, int start), + + TP_ARGS(sdp, wbc, start), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( int, start ) + __field( int, sync_mode ) + __field( long, nr_to_write ) + ), + + TP_fast_assign( + __entry->dev = sdp->sd_vfs->s_dev; + __entry->start = start; + __entry->sync_mode = wbc->sync_mode; + __entry->nr_to_write = wbc->nr_to_write; + ), + + TP_printk("%u,%u ail flush %s %s %ld", MAJOR(__entry->dev), + MINOR(__entry->dev), __entry->start ? "start" : "end", + __entry->sync_mode == WB_SYNC_ALL ? "all" : "none", + __entry->nr_to_write) +); + /* Section 3 - bmap * * Objectives: |