[PATCH 05/17] writeback: quit throttling when signal pending

[Wu Fengguang]

This allows quick response to Ctrl-C etc. for impatient users.

Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
 mm/page-writeback.c |    3 +++
 1 file changed, 3 insertions(+)

--- linux-next.orig/mm/page-writeback.c	2010-09-09 16:01:14.000000000 +0800
+++ linux-next/mm/page-writeback.c	2010-09-09 16:02:27.000000000 +0800
@@ -553,6 +553,9 @@ static void balance_dirty_pages(struct a
 		__set_current_state(TASK_INTERRUPTIBLE);
 		io_schedule_timeout(pause);
 
+		if (signal_pending(current))
+			break;
+
 check_exceeded:
 		/*
 		 * The bdi thresh is somehow "soft" limit derived from the


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