static long ratelimit_pages = 32;
static long total_pages; /* The total number of pages in the machine. */
-static int dirty_exceeded; /* Dirty mem may be over limit */
+static int dirty_exceeded __cacheline_aligned_in_smp; /* Dirty mem may be over limit */
/*
* When balance_dirty_pages decides that the caller needs to perform some
if (nr_reclaimable + wbs.nr_writeback <= dirty_thresh)
break;
- dirty_exceeded = 1;
+ if (!dirty_exceeded)
+ dirty_exceeded = 1;
/* Note: nr_reclaimable denotes nr_dirty + nr_unstable.
* Unstable writes are a feature of certain networked
blk_congestion_wait(WRITE, HZ/10);
}
- if (nr_reclaimable + wbs.nr_writeback <= dirty_thresh)
+ if (nr_reclaimable + wbs.nr_writeback <= dirty_thresh && dirty_exceeded)
dirty_exceeded = 0;
if (writeback_in_progress(bdi))
* the whole world. Returns 0 if a pdflush thread was dispatched. Returns
* -1 if all pdflush threads were busy.
*/
-int wakeup_bdflush(long nr_pages)
+int wakeup_pdflush(long nr_pages)
{
if (nr_pages == 0) {
struct writeback_state wbs;
static void wb_timer_fn(unsigned long unused);
static void laptop_timer_fn(unsigned long unused);
-static struct timer_list wb_timer =
- TIMER_INITIALIZER(wb_timer_fn, 0, 0);
-static struct timer_list laptop_mode_wb_timer =
- TIMER_INITIALIZER(laptop_timer_fn, 0, 0);
+static DEFINE_TIMER(wb_timer, wb_timer_fn, 0, 0);
+static DEFINE_TIMER(laptop_mode_wb_timer, laptop_timer_fn, 0, 0);
/*
* Periodic writeback of "old" data.
int do_writepages(struct address_space *mapping, struct writeback_control *wbc)
{
+ int ret;
+
if (wbc->nr_to_write <= 0)
return 0;
+ wbc->for_writepages = 1;
if (mapping->a_ops->writepages)
- return mapping->a_ops->writepages(mapping, wbc);
- return generic_writepages(mapping, wbc);
+ ret = mapping->a_ops->writepages(mapping, wbc);
+ else
+ ret = generic_writepages(mapping, wbc);
+ wbc->for_writepages = 0;
+ return ret;
}
/**