From 99cb1a318c37bf462c53d43f4dacb7b4896ce0c9 Mon Sep 17 00:00:00 2001 From: Lukas Czerner Date: Mon, 23 May 2011 18:33:02 +0200 Subject: jbd: Add fixed tracepoints This commit adds fixed tracepoint for jbd. It has been based on fixed tracepoints for jbd2, however there are missing those for collecting statistics, since I think that it will require more intrusive patch so I should have its own commit, if someone decide that it is needed. Also there are new tracepoints in __journal_drop_transaction() and journal_update_superblock(). The list of jbd tracepoints: jbd_checkpoint jbd_start_commit jbd_commit_locking jbd_commit_flushing jbd_commit_logging jbd_drop_transaction jbd_end_commit jbd_do_submit_data jbd_cleanup_journal_tail jbd_update_superblock_end Signed-off-by: Lukas Czerner Cc: Jan Kara Signed-off-by: Jan Kara --- fs/jbd/commit.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'fs/jbd/commit.c') diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c index 72ffa974b0b8..eedd201374a8 100644 --- a/fs/jbd/commit.c +++ b/fs/jbd/commit.c @@ -21,6 +21,7 @@ #include #include #include +#include /* * Default IO end handler for temporary BJ_IO buffer_heads. @@ -204,6 +205,8 @@ write_out_data: if (!trylock_buffer(bh)) { BUFFER_TRACE(bh, "needs blocking lock"); spin_unlock(&journal->j_list_lock); + trace_jbd_do_submit_data(journal, + commit_transaction); /* Write out all data to prevent deadlocks */ journal_do_submit_data(wbuf, bufs, write_op); bufs = 0; @@ -236,6 +239,8 @@ write_out_data: jbd_unlock_bh_state(bh); if (bufs == journal->j_wbufsize) { spin_unlock(&journal->j_list_lock); + trace_jbd_do_submit_data(journal, + commit_transaction); journal_do_submit_data(wbuf, bufs, write_op); bufs = 0; goto write_out_data; @@ -266,6 +271,7 @@ write_out_data: } } spin_unlock(&journal->j_list_lock); + trace_jbd_do_submit_data(journal, commit_transaction); journal_do_submit_data(wbuf, bufs, write_op); return err; @@ -316,12 +322,14 @@ void journal_commit_transaction(journal_t *journal) commit_transaction = journal->j_running_transaction; J_ASSERT(commit_transaction->t_state == T_RUNNING); + trace_jbd_start_commit(journal, commit_transaction); jbd_debug(1, "JBD: starting commit of transaction %d\n", commit_transaction->t_tid); spin_lock(&journal->j_state_lock); commit_transaction->t_state = T_LOCKED; + trace_jbd_commit_locking(journal, commit_transaction); spin_lock(&commit_transaction->t_handle_lock); while (commit_transaction->t_updates) { DEFINE_WAIT(wait); @@ -392,6 +400,7 @@ void journal_commit_transaction(journal_t *journal) */ journal_switch_revoke_table(journal); + trace_jbd_commit_flushing(journal, commit_transaction); commit_transaction->t_state = T_FLUSH; journal->j_committing_transaction = commit_transaction; journal->j_running_transaction = NULL; @@ -493,6 +502,7 @@ void journal_commit_transaction(journal_t *journal) commit_transaction->t_state = T_COMMIT; spin_unlock(&journal->j_state_lock); + trace_jbd_commit_logging(journal, commit_transaction); J_ASSERT(commit_transaction->t_nr_buffers <= commit_transaction->t_outstanding_credits); @@ -946,6 +956,7 @@ restart_loop: } spin_unlock(&journal->j_list_lock); + trace_jbd_end_commit(journal, commit_transaction); jbd_debug(1, "JBD: commit %d complete, head %d\n", journal->j_commit_sequence, journal->j_tail_sequence); -- cgit v1.2.3-59-g8ed1b