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-rw-r--r--mm/backing-dev.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 707d0dc6da0f..660a87a22511 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -48,7 +48,6 @@ static struct timer_list sync_supers_timer;
static int bdi_sync_supers(void *);
static void sync_supers_timer_fn(unsigned long);
-static void arm_supers_timer(void);
static void bdi_add_default_flusher_task(struct backing_dev_info *bdi);
@@ -252,7 +251,7 @@ static int __init default_bdi_init(void)
init_timer(&sync_supers_timer);
setup_timer(&sync_supers_timer, sync_supers_timer_fn, 0);
- arm_supers_timer();
+ bdi_arm_supers_timer();
err = bdi_init(&default_backing_dev_info);
if (!err)
@@ -374,10 +373,13 @@ static int bdi_sync_supers(void *unused)
return 0;
}
-static void arm_supers_timer(void)
+void bdi_arm_supers_timer(void)
{
unsigned long next;
+ if (!dirty_writeback_interval)
+ return;
+
next = msecs_to_jiffies(dirty_writeback_interval * 10) + jiffies;
mod_timer(&sync_supers_timer, round_jiffies_up(next));
}
@@ -385,7 +387,7 @@ static void arm_supers_timer(void)
static void sync_supers_timer_fn(unsigned long unused)
{
wake_up_process(sync_supers_tsk);
- arm_supers_timer();
+ bdi_arm_supers_timer();
}
static int bdi_forker_task(void *ptr)
@@ -428,7 +430,10 @@ static int bdi_forker_task(void *ptr)
spin_unlock_bh(&bdi_lock);
wait = msecs_to_jiffies(dirty_writeback_interval * 10);
- schedule_timeout(wait);
+ if (wait)
+ schedule_timeout(wait);
+ else
+ schedule();
try_to_freeze();
continue;
}