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| author | Theodore Ts'o <tytso@mit.edu> | 2009-03-25 23:35:46 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-03-25 23:35:46 -0400 |
| commit | 7058548cd50e5bda8db086bb2e5c1d82f746d047 (patch) | |
| tree | acd095e9f13fcb10deab00e5da5c22d35fda646d /fs/jbd2 | |
| parent | afd4672dc7610b7feef5190168aa917cc2e417e4 (diff) | |
| download | lwn-7058548cd50e5bda8db086bb2e5c1d82f746d047.tar.gz lwn-7058548cd50e5bda8db086bb2e5c1d82f746d047.zip | |
ext4: Use WRITE_SYNC for commits which are caused by fsync()
If a commit is triggered by fsync(), set a flag indicating the journal
blocks associated with the transaction should be flushed out using
WRITE_SYNC.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2')
| -rw-r--r-- | fs/jbd2/commit.c | 5 | ||||
| -rw-r--r-- | fs/jbd2/transaction.c | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 62804e57a44c..4ea72377c7a2 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -367,6 +367,7 @@ void jbd2_journal_commit_transaction(journal_t *journal) int tag_bytes = journal_tag_bytes(journal); struct buffer_head *cbh = NULL; /* For transactional checksums */ __u32 crc32_sum = ~0; + int write_op = WRITE; /* * First job: lock down the current transaction and wait for @@ -401,6 +402,8 @@ void jbd2_journal_commit_transaction(journal_t *journal) spin_lock(&journal->j_state_lock); commit_transaction->t_state = T_LOCKED; + if (commit_transaction->t_synchronous_commit) + write_op = WRITE_SYNC; stats.u.run.rs_wait = commit_transaction->t_max_wait; stats.u.run.rs_locked = jiffies; stats.u.run.rs_running = jbd2_time_diff(commit_transaction->t_start, @@ -680,7 +683,7 @@ start_journal_io: clear_buffer_dirty(bh); set_buffer_uptodate(bh); bh->b_end_io = journal_end_buffer_io_sync; - submit_bh(WRITE, bh); + submit_bh(write_op, bh); } cond_resched(); stats.u.run.rs_blocks_logged += bufs; diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 28ce21d8598e..996ffda06bf3 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1315,6 +1315,8 @@ int jbd2_journal_stop(handle_t *handle) } } + if (handle->h_sync) + transaction->t_synchronous_commit = 1; current->journal_info = NULL; spin_lock(&journal->j_state_lock); spin_lock(&transaction->t_handle_lock); |