diff options
Diffstat (limited to 'mm/page_io.c')
| -rw-r--r-- | mm/page_io.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/page_io.c b/mm/page_io.c index 78eee32ee486..61828703c4a2 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -214,6 +214,7 @@ 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, @@ -222,7 +223,23 @@ int swap_writepage(struct page *page, struct writeback_control *wbc) if (ret == PAGE_SIZE) { 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; } |