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| author | Tao Ma <boyu.mt@taobao.com> | 2011-05-22 21:45:26 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-05-22 21:45:26 -0400 |
| commit | 28e35e42fb255cbaeee8b9f89643f26fe376374d (patch) | |
| tree | db83cfc348e1ff652aea17eff6ff4eb07d8cd8a9 /fs/jbd2/transaction.c | |
| parent | f6d2f6b327ceef5c689581529a852dc6ec3b74a6 (diff) | |
| download | lwn-28e35e42fb255cbaeee8b9f89643f26fe376374d.tar.gz lwn-28e35e42fb255cbaeee8b9f89643f26fe376374d.zip | |
jbd2: Fix the wrong calculation of t_max_wait in update_t_max_wait
t_max_wait is added in commit 8e85fb3f to indicate how long we
were waiting for new transaction to start. In commit 6d0bf005,
it is moved to another function named update_t_max_wait to
avoid a build warning. But the wrong thing is that the original
'ts' is initialized in the start of function start_this_handle
and we can calculate t_max_wait in the right way. while with
this change, ts is initialized within the function and t_max_wait
can never be calculated right.
This patch moves the initialization of ts to the original beginning
of start_this_handle and pass it to function update_t_max_wait so
that it can be calculated right and the build warning is avoided also.
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Diffstat (limited to 'fs/jbd2/transaction.c')
| -rw-r--r-- | fs/jbd2/transaction.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 05fa77a23711..85a055ef93fe 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -82,7 +82,7 @@ jbd2_get_transaction(journal_t *journal, transaction_t *transaction) */ /* - * Update transiaction's maximum wait time, if debugging is enabled. + * Update transaction's maximum wait time, if debugging is enabled. * * In order for t_max_wait to be reliable, it must be protected by a * lock. But doing so will mean that start_this_handle() can not be @@ -91,11 +91,10 @@ jbd2_get_transaction(journal_t *journal, transaction_t *transaction) * means that maximum wait time reported by the jbd2_run_stats * tracepoint will always be zero. */ -static inline void update_t_max_wait(transaction_t *transaction) +static inline void update_t_max_wait(transaction_t *transaction, + unsigned long ts) { #ifdef CONFIG_JBD2_DEBUG - unsigned long ts = jiffies; - if (jbd2_journal_enable_debug && time_after(transaction->t_start, ts)) { ts = jbd2_time_diff(ts, transaction->t_start); @@ -121,6 +120,7 @@ static int start_this_handle(journal_t *journal, handle_t *handle, tid_t tid; int needed, need_to_start; int nblocks = handle->h_buffer_credits; + unsigned long ts = jiffies; if (nblocks > journal->j_max_transaction_buffers) { printk(KERN_ERR "JBD: %s wants too many credits (%d > %d)\n", @@ -271,7 +271,7 @@ repeat: /* OK, account for the buffers that this operation expects to * use and add the handle to the running transaction. */ - update_t_max_wait(transaction); + update_t_max_wait(transaction, ts); handle->h_transaction = transaction; atomic_inc(&transaction->t_updates); atomic_inc(&transaction->t_handle_count); |