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authorTejun Heo <htejun@gmail.com>2006-12-06 20:36:01 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:32 -0800
commit593be07ae8f6f4a1b1b98813fabb155328f8bc0c (patch)
tree570686c676986d79ff0868f88c499a8b8fc1d3b4
parente59e2ae2c29700117a54e85c106017c24837119f (diff)
[PATCH] file: kill unnecessary timer in fdtable_defer
free_fdtable_rc() schedules timer to reschedule fddef->wq if schedule_work() on it returns 0. However, schedule_work() guarantees that the target work is executed at least once after the scheduling regardless of its return value. 0 return simply means that the work was already pending and thus no further action was required. Another problem is that it used contant '5' as @expires argument to mod_timer(). Kill unnecessary fddef->timer. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/file.c29
1 files changed, 2 insertions, 27 deletions
diff --git a/fs/file.c b/fs/file.c
index 3787e82f54c..51aef675470 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -21,7 +21,6 @@
struct fdtable_defer {
spinlock_t lock;
struct work_struct wq;
- struct timer_list timer;
struct fdtable *next;
};
@@ -75,22 +74,6 @@ static void __free_fdtable(struct fdtable *fdt)
kfree(fdt);
}
-static void fdtable_timer(unsigned long data)
-{
- struct fdtable_defer *fddef = (struct fdtable_defer *)data;
-
- spin_lock(&fddef->lock);
- /*
- * If someone already emptied the queue return.
- */
- if (!fddef->next)
- goto out;
- if (!schedule_work(&fddef->wq))
- mod_timer(&fddef->timer, 5);
-out:
- spin_unlock(&fddef->lock);
-}
-
static void free_fdtable_work(struct work_struct *work)
{
struct fdtable_defer *f =
@@ -144,13 +127,8 @@ static void free_fdtable_rcu(struct rcu_head *rcu)
spin_lock(&fddef->lock);
fdt->next = fddef->next;
fddef->next = fdt;
- /*
- * vmallocs are handled from the workqueue context.
- * If the per-cpu workqueue is running, then we
- * defer work scheduling through a timer.
- */
- if (!schedule_work(&fddef->wq))
- mod_timer(&fddef->timer, 5);
+ /* vmallocs are handled from the workqueue context */
+ schedule_work(&fddef->wq);
spin_unlock(&fddef->lock);
put_cpu_var(fdtable_defer_list);
}
@@ -354,9 +332,6 @@ static void __devinit fdtable_defer_list_init(int cpu)
struct fdtable_defer *fddef = &per_cpu(fdtable_defer_list, cpu);
spin_lock_init(&fddef->lock);
INIT_WORK(&fddef->wq, free_fdtable_work);
- init_timer(&fddef->timer);
- fddef->timer.data = (unsigned long)fddef;
- fddef->timer.function = fdtable_timer;
fddef->next = NULL;
}