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-rw-r--r--mm/page-writeback.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 01b9cb8..2e847cd 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -944,12 +944,26 @@ retry:
}
ret = (*writepage)(page, wbc, data);
-
- if (unlikely(ret == AOP_WRITEPAGE_ACTIVATE)) {
- unlock_page(page);
- ret = 0;
- }
- if (ret || (--nr_to_write <= 0))
+ if (unlikely(ret)) {
+ if (ret == AOP_WRITEPAGE_ACTIVATE) {
+ unlock_page(page);
+ ret = 0;
+ } else {
+ /*
+ * done_index is set past this page,
+ * so media errors will not choke
+ * background writeout for the entire
+ * file. This has consequences for
+ * range_cyclic semantics (ie. it may
+ * not be suitable for data integrity
+ * writeout).
+ */
+ done = 1;
+ break;
+ }
+ }
+
+ if (--nr_to_write <= 0)
done = 1;
if (wbc->nonblocking && bdi_write_congested(bdi)) {
wbc->encountered_congestion = 1;
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