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| author | Jan Kara <jack@suse.cz> | 2008-08-27 22:30:28 +0200 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2009-01-05 08:40:23 -0800 |
| commit | 90e86a63eadf1a3b2f19b68d82150dc63fe01443 (patch) | |
| tree | 4168749ab4c9a0e849c9ad419ee66a2992053243 /fs/ocfs2/journal.c | |
| parent | 12c77527e4138bc3b17d17b0e0c909e4fc84924f (diff) | |
| download | lwn-90e86a63eadf1a3b2f19b68d82150dc63fe01443.tar.gz lwn-90e86a63eadf1a3b2f19b68d82150dc63fe01443.zip | |
ocfs2: Support nested transactions
OCFS2 can easily support nested transactions. We just have to
take care and not spoil statistics acquire semaphore unnecessarily.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/journal.c')
| -rw-r--r-- | fs/ocfs2/journal.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c index 12b62a3cbf69..11a1178d5ee8 100644 --- a/fs/ocfs2/journal.c +++ b/fs/ocfs2/journal.c @@ -256,11 +256,9 @@ handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs) BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE); BUG_ON(max_buffs <= 0); - /* JBD might support this, but our journalling code doesn't yet. */ - if (journal_current_handle()) { - mlog(ML_ERROR, "Recursive transaction attempted!\n"); - BUG(); - } + /* Nested transaction? Just return the handle... */ + if (journal_current_handle()) + return jbd2_journal_start(journal, max_buffs); down_read(&osb->journal->j_trans_barrier); @@ -285,16 +283,18 @@ handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs) int ocfs2_commit_trans(struct ocfs2_super *osb, handle_t *handle) { - int ret; + int ret, nested; struct ocfs2_journal *journal = osb->journal; BUG_ON(!handle); + nested = handle->h_ref > 1; ret = jbd2_journal_stop(handle); if (ret < 0) mlog_errno(ret); - up_read(&journal->j_trans_barrier); + if (!nested) + up_read(&journal->j_trans_barrier); return ret; } |