[patch 35/40] mm: write_cache_pages more terminate quickly

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>

commit 82fd1a9a8ced9607312b54859572bcc6211e8919 upstream.

Now that we have the early-termination logic in place, it makes sense to
bail out early in all other cases where done is set to 1.

Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Cc: Chris Mason <chris.mason@xxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 mm/page-writeback.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -987,12 +987,15 @@ continue_unlock:
 
 			if (wbc->sync_mode == WB_SYNC_NONE) {
 				wbc->nr_to_write--;
-				if (wbc->nr_to_write <= 0)
+				if (wbc->nr_to_write <= 0) {
 					done = 1;
+					break;
+				}
 			}
 			if (wbc->nonblocking && bdi_write_congested(bdi)) {
 				wbc->encountered_congestion = 1;
 				done = 1;
+				break;
 			}
 		}
 		pagevec_release(&pvec);

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