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| author | Jens Axboe <jaxboe@fusionio.com> | 2011-03-17 13:01:52 +0300 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-03-17 13:01:52 +0300 |
| commit | 82f04ab47e1d94d78503591a7460b2cad9601ede (patch) | |
| tree | a79fd1ba1c8dce2147cb3bea54357321f73e642d /fs/jbd2/commit.c | |
| parent | 65ab80279d7c323ce151e858d951e2684df72a97 (diff) | |
| download | linux-82f04ab47e1d94d78503591a7460b2cad9601ede.tar.xz | |
jbd2: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging
'write_op' was still used, even though it was always WRITE_SYNC now.
Add plugging around the cases where it submits IO, and flush them
before we end up waiting for that IO.
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/jbd2/commit.c')
| -rw-r--r-- | fs/jbd2/commit.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 3da1cc4346d5..fa36d7662b21 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -329,7 +329,7 @@ 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_SYNC; + struct blk_plug plug; /* * First job: lock down the current transaction and wait for @@ -363,13 +363,6 @@ void jbd2_journal_commit_transaction(journal_t *journal) write_lock(&journal->j_state_lock); commit_transaction->t_state = T_LOCKED; - /* - * Use plugged writes here, since we want to submit several before - * we unplug the device. We don't do explicit unplugging in here, - * instead we rely on sync_buffer() doing the unplug for us. - */ - if (commit_transaction->t_synchronous_commit) - write_op = WRITE_SYNC; trace_jbd2_commit_locking(journal, commit_transaction); stats.run.rs_wait = commit_transaction->t_max_wait; stats.run.rs_locked = jiffies; @@ -469,8 +462,10 @@ void jbd2_journal_commit_transaction(journal_t *journal) if (err) jbd2_journal_abort(journal, err); + blk_start_plug(&plug); jbd2_journal_write_revoke_records(journal, commit_transaction, - write_op); + WRITE_SYNC); + blk_finish_plug(&plug); jbd_debug(3, "JBD: commit phase 2\n"); @@ -497,6 +492,7 @@ void jbd2_journal_commit_transaction(journal_t *journal) err = 0; descriptor = NULL; bufs = 0; + blk_start_plug(&plug); while (commit_transaction->t_buffers) { /* Find the next buffer to be journaled... */ @@ -658,7 +654,7 @@ start_journal_io: clear_buffer_dirty(bh); set_buffer_uptodate(bh); bh->b_end_io = journal_end_buffer_io_sync; - submit_bh(write_op, bh); + submit_bh(WRITE_SYNC, bh); } cond_resched(); stats.run.rs_blocks_logged += bufs; @@ -699,6 +695,8 @@ start_journal_io: __jbd2_journal_abort_hard(journal); } + blk_finish_plug(&plug); + /* Lo and behold: we have just managed to send a transaction to the log. Before we can commit it, wait for the IO so far to complete. Control buffers being written are on the |