提交 e3df1898 编写于 作者: A Andrew Morton 提交者: Linus Torvalds

[PATCH] jbd: embed j_commit_timer in journal struct

The kjournald timer is currently on the kernel thread's stack and the journal
structure points at it.  Save a pointer hop by moving the timer into the
journal structure.
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 1d9b7d97
......@@ -111,18 +111,17 @@ static void commit_timeout(unsigned long __data)
static int kjournald(void *arg)
{
journal_t *journal = (journal_t *) arg;
journal_t *journal = arg;
transaction_t *transaction;
struct timer_list timer;
daemonize("kjournald");
/* Set up an interval timer which can be used to trigger a
commit wakeup after the commit interval expires */
init_timer(&timer);
timer.data = (unsigned long) current;
timer.function = commit_timeout;
journal->j_commit_timer = &timer;
/*
* Set up an interval timer which can be used to trigger a commit wakeup
* after the commit interval expires
*/
setup_timer(&journal->j_commit_timer, commit_timeout,
(unsigned long)current);
/* Record that the journal thread is running */
journal->j_task = current;
......@@ -146,7 +145,7 @@ static int kjournald(void *arg)
if (journal->j_commit_sequence != journal->j_commit_request) {
jbd_debug(1, "OK, requests differ\n");
spin_unlock(&journal->j_state_lock);
del_timer_sync(journal->j_commit_timer);
del_timer_sync(&journal->j_commit_timer);
journal_commit_transaction(journal);
spin_lock(&journal->j_state_lock);
goto loop;
......@@ -203,7 +202,7 @@ static int kjournald(void *arg)
end_loop:
spin_unlock(&journal->j_state_lock);
del_timer_sync(journal->j_commit_timer);
del_timer_sync(&journal->j_commit_timer);
journal->j_task = NULL;
wake_up(&journal->j_wait_done_commit);
jbd_debug(1, "Journal thread exiting.\n");
......
......@@ -53,8 +53,8 @@ get_transaction(journal_t *journal, transaction_t *transaction)
spin_lock_init(&transaction->t_handle_lock);
/* Set up the commit timer for the new transaction. */
journal->j_commit_timer->expires = transaction->t_expires;
add_timer(journal->j_commit_timer);
journal->j_commit_timer.expires = transaction->t_expires;
add_timer(&journal->j_commit_timer);
J_ASSERT(journal->j_running_transaction == NULL);
journal->j_running_transaction = transaction;
......
......@@ -29,6 +29,8 @@
#include <linux/stddef.h>
#include <linux/bit_spinlock.h>
#include <linux/mutex.h>
#include <linux/timer.h>
#include <asm/semaphore.h>
#endif
......@@ -787,7 +789,7 @@ struct journal_s
unsigned long j_commit_interval;
/* The timer used to wakeup the commit thread: */
struct timer_list *j_commit_timer;
struct timer_list j_commit_timer;
/*
* The revoke table: maintains the list of revoked blocks in the
......
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