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GFS2: Add an AIL writeback tracepoint

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Add a tracepoint for monitoring writeback of the AIL.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
2011-04-18 14:18:38 +01:00
parent 4667a0ec32
commit c83ae9cad8
2 changed files with 30 additions and 0 deletions
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2
fs/gfs2/log.c
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@@ -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);
}
/**