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-rw-r--r--mm/page_io.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/page_io.c b/mm/page_io.c
index eb3300fa89dc..bb5d75274686 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -223,6 +223,7 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
kiocb.ki_left = PAGE_SIZE;
kiocb.ki_nbytes = PAGE_SIZE;
+ set_page_writeback(page);
unlock_page(page);
ret = mapping->a_ops->direct_IO(KERNEL_WRITE,
&kiocb, &iov,
@@ -232,8 +233,22 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
count_vm_event(PSWPOUT);
ret = 0;
} else {
+ /*
+ * In the case of swap-over-nfs, this can be a
+ * temporary failure if the system has limited
+ * memory for allocating transmit buffers.
+ * Mark the page dirty and avoid
+ * rotate_reclaimable_page but rate-limit the
+ * messages but do not flag PageError like
+ * the normal direct-to-bio case as it could
+ * be temporary.
+ */
set_page_dirty(page);
+ ClearPageReclaim(page);
+ pr_err_ratelimited("Write error on dio swapfile (%Lu)\n",
+ page_file_offset(page));
}
+ end_page_writeback(page);
return ret;
}