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authorTheodore Ts'o <tytso@mit.edu>2013-02-06 22:30:23 -0500
committerTheodore Ts'o <tytso@mit.edu>2013-02-06 22:30:23 -0500
commit9fff24aa2c5c504aadead1ff9599e813604c2e53 (patch)
tree24bbb1691ec816aed648a895882526ce361ec92f /fs/jbd2/transaction.c
parent40ae3487628235e5f1eb27542cca0cdb6e5dbe16 (diff)
downloadblackbird-op-linux-9fff24aa2c5c504aadead1ff9599e813604c2e53.tar.gz
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jbd2: track request delay statistics
Track the delay between when we first request that the commit begin and when it actually begins, so we can see how much of a gap exists. In theory, this should just be the remaining scheduling quantuum of the thread which requested the commit (assuming it was not a synchronous operation which triggered the commit request) plus scheduling overhead; however, it's possible that real time processes might get in the way of letting the kjournald thread from executing. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2/transaction.c')
-rw-r--r--fs/jbd2/transaction.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index df9f29760efa..735609e2d636 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -100,6 +100,7 @@ jbd2_get_transaction(journal_t *journal, transaction_t *transaction)
journal->j_running_transaction = transaction;
transaction->t_max_wait = 0;
transaction->t_start = jiffies;
+ transaction->t_requested = 0;
return transaction;
}
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