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-rw-r--r--mm/page-writeback.c23
1 files changed, 7 insertions, 16 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index a3278f005230..71252486bc6f 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -128,7 +128,6 @@ unsigned long global_dirty_limit;
*
*/
static struct prop_descriptor vm_completions;
-static struct prop_descriptor vm_dirties;
/*
* couple the period to the dirty_ratio:
@@ -154,7 +153,6 @@ static void update_completion_period(void)
{
int shift = calc_period_shift();
prop_change_shift(&vm_completions, shift);
- prop_change_shift(&vm_dirties, shift);
writeback_set_ratelimit();
}
@@ -235,11 +233,6 @@ void bdi_writeout_inc(struct backing_dev_info *bdi)
}
EXPORT_SYMBOL_GPL(bdi_writeout_inc);
-void task_dirty_inc(struct task_struct *tsk)
-{
- prop_inc_single(&vm_dirties, &tsk->dirties);
-}
-
/*
* Obtain an accurate fraction of the BDI's portion.
*/
@@ -1133,17 +1126,17 @@ pause:
pages_dirtied,
pause,
start_time);
- __set_current_state(TASK_UNINTERRUPTIBLE);
+ __set_current_state(TASK_KILLABLE);
io_schedule_timeout(pause);
- dirty_thresh = hard_dirty_limit(dirty_thresh);
/*
- * max-pause area. If dirty exceeded but still within this
- * area, no need to sleep for more than 200ms: (a) 8 pages per
- * 200ms is typically more than enough to curb heavy dirtiers;
- * (b) the pause time limit makes the dirtiers more responsive.
+ * This is typically equal to (nr_dirty < dirty_thresh) and can
+ * also keep "1000+ dd on a slow USB stick" under control.
*/
- if (nr_dirty < dirty_thresh)
+ if (task_ratelimit)
+ break;
+
+ if (fatal_signal_pending(current))
break;
}
@@ -1395,7 +1388,6 @@ void __init page_writeback_init(void)
shift = calc_period_shift();
prop_descriptor_init(&vm_completions, shift);
- prop_descriptor_init(&vm_dirties, shift);
}
/**
@@ -1724,7 +1716,6 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
__inc_zone_page_state(page, NR_DIRTIED);
__inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
__inc_bdi_stat(mapping->backing_dev_info, BDI_DIRTIED);
- task_dirty_inc(current);
task_io_account_write(PAGE_CACHE_SIZE);
}
}