Move when we call clear_page_dirty_for_io() to just before we actually
write the page. This simplifies the code somewhat, and avoids marking
pages as clean and then needing to remark them as dirty later.
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
---
fs/ext4/inode.c | 28 +++++++++++-----------------
1 files changed, 11 insertions(+), 17 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index e230f4f..3eca465 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2060,7 +2060,7 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd,
if (nr_pages == 0)
break;
for (i = 0; i < nr_pages; i++) {
- int commit_write = 0, redirty_page = 0;
+ int commit_write = 0, skip_page = 0;
struct page *page = pvec.pages[i];
index = page->index;
@@ -2086,14 +2086,12 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd,
* If the page does not have buffers (for
* whatever reason), try to create them using
* __block_write_begin. If this fails,
- * redirty the page and move on.
+ * skip the page and move on.
*/
if (!page_has_buffers(page)) {
if (__block_write_begin(page, 0, len,
noalloc_get_block_write)) {
- redirty_page:
- redirty_page_for_writepage(mpd->wbc,
- page);
+ skip_page:
unlock_page(page);
continue;
}
@@ -2104,7 +2102,7 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd,
block_start = 0;
do {
if (!bh)
- goto redirty_page;
+ goto skip_page;
if (map && (cur_logical >= map->m_lblk) &&
(cur_logical <= (map->m_lblk +
(map->m_len - 1)))) {
@@ -2120,22 +2118,23 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd,
clear_buffer_unwritten(bh);
}
- /* redirty page if block allocation undone */
+ /* skip page if block allocation undone */
if (buffer_delay(bh) || buffer_unwritten(bh))
- redirty_page = 1;
+ skip_page = 1;
bh = bh->b_this_page;
block_start += bh->b_size;
cur_logical++;
pblock++;
} while (bh != page_bufs);
- if (redirty_page)
- goto redirty_page;
+ if (skip_page)
+ goto skip_page;
if (commit_write)
/* mark the buffer_heads as dirty & uptodate */
block_commit_write(page, 0, len);
+ clear_page_dirty_for_io(page);
/*
* Delalloc doesn't support data journalling,
* but eventually maybe we'll lift this
@@ -2279,9 +2278,8 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd)
err = blks;
/*
* If get block returns EAGAIN or ENOSPC and there
- * appears to be free blocks we will call
- * ext4_writepage() for all of the pages which will
- * just redirty the pages.
+ * appears to be free blocks we will just let
+ * mpage_da_submit_io() unlock all of the pages.
*/
if (err == -EAGAIN)
goto submit_io;
@@ -2777,7 +2775,6 @@ static int write_cache_pages_da(struct address_space *mapping,
(PageWriteback(page) &&
(wbc->sync_mode == WB_SYNC_NONE)) ||
unlikely(page->mapping != mapping)) {
- continue_unlock:
unlock_page(page);
continue;
}
@@ -2786,8 +2783,6 @@ static int write_cache_pages_da(struct address_space *mapping,
wait_on_page_writeback(page);
BUG_ON(PageWriteback(page));
- if (!clear_page_dirty_for_io(page))
- goto continue_unlock;
/*
* Can we merge this page to current extent?
@@ -2803,7 +2798,6 @@ static int write_cache_pages_da(struct address_space *mapping,
/*
* skip rest of the page in the page_vec
*/
- redirty_page_for_writepage(wbc, page);
unlock_page(page);
goto ret_extent_tail;
}
--
1.7.3.1
--
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