1 files changed, 0 insertions, 96 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 13fbbaea10ea..80c710ae470b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -421,66 +421,6 @@ static int __check_block_validity(struct inode *inode, const char *func,
 #define check_block_validity(inode, map)        \
         __check_block_validity((inode), __func__, __LINE__, (map))
 
-/*
- * Return the number of contiguous dirty pages in a given inode
- * starting at page frame idx.
- */
-static pgoff_t ext4_num_dirty_pages(struct inode *inode, pgoff_t idx,
-                                    unsigned int max_pages)
-{
-        struct address_space *mapping = inode->i_mapping;
-        pgoff_t index;
-        struct pagevec pvec;
-        pgoff_t num = 0;
-        int i, nr_pages, done = 0;
-
-        if (max_pages == 0)
-                return 0;
-        pagevec_init(&pvec, 0);
-        while (!done) {
-                index = idx;
-                nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
-                                              PAGECACHE_TAG_DIRTY,
-                                              (pgoff_t)PAGEVEC_SIZE);
-                if (nr_pages == 0)
-                        break;
-                for (i = 0; i < nr_pages; i++) {
-                        struct page *page = pvec.pages[i];
-                        struct buffer_head *bh, *head;
-
-                        lock_page(page);
-                        if (unlikely(page->mapping != mapping) ||
-                            !PageDirty(page) ||
-                            PageWriteback(page) ||
-                            page->index != idx) {
-                                done = 1;
-                                unlock_page(page);
-                                break;
-                        }
-                        if (page_has_buffers(page)) {
-                                bh = head = page_buffers(page);
-                                do {
-                                        if (!buffer_delay(bh) &&
-                                            !buffer_unwritten(bh))
-                                                done = 1;
-                                        bh = bh->b_this_page;
-                                } while (!done && (bh != head));
-                        }
-                        unlock_page(page);
-                        if (done)
-                                break;
-                        idx++;
-                        num++;
-                        if (num >= max_pages) {
-                                done = 1;
-                                break;
-                        }
-                }
-                pagevec_release(&pvec);
-        }
-        return num;
-}
-
 #ifdef ES_AGGRESSIVE_TEST
 static void ext4_map_blocks_es_recheck(handle_t *handle,
                                        struct inode *inode,
@@ -2462,10 +2402,8 @@ static int ext4_da_writepages(struct address_space *mapping,
         struct mpage_da_data mpd;
         struct inode *inode = mapping->host;
         int pages_written = 0;
-        unsigned int max_pages;
         int range_cyclic, cycled = 1, io_done = 0;
         int needed_blocks, ret = 0;
-        long desired_nr_to_write, nr_to_writebump = 0;
         loff_t range_start = wbc->range_start;
         struct ext4_sb_info *sbi = EXT4_SB(mapping->host->i_sb);
         pgoff_t done_index = 0;
@@ -2512,39 +2450,6 @@ static int ext4_da_writepages(struct address_space *mapping,
                 end = wbc->range_end >> PAGE_CACHE_SHIFT;
         }
 
-        /*
-         * This works around two forms of stupidity.  The first is in
-         * the writeback code, which caps the maximum number of pages
-         * written to be 1024 pages.  This is wrong on multiple
-         * levels; different architectues have a different page size,
-         * which changes the maximum amount of data which gets
-         * written.  Secondly, 4 megabytes is way too small.  XFS
-         * forces this value to be 16 megabytes by multiplying
-         * nr_to_write parameter by four, and then relies on its
-         * allocator to allocate larger extents to make them
-         * contiguous.  Unfortunately this brings us to the second
-         * stupidity, which is that ext4's mballoc code only allocates
-         * at most 2048 blocks.  So we force contiguous writes up to
-         * the number of dirty blocks in the inode, or
-         * sbi->max_writeback_mb_bump whichever is smaller.
-         */
-        max_pages = sbi->s_max_writeback_mb_bump << (20 - PAGE_CACHE_SHIFT);
-        if (!range_cyclic && range_whole) {
-                if (wbc->nr_to_write == LONG_MAX)
-                        desired_nr_to_write = wbc->nr_to_write;
-                else
-                        desired_nr_to_write = wbc->nr_to_write * 8;
-        } else
-                desired_nr_to_write = ext4_num_dirty_pages(inode, index,
-                                                           max_pages);
-        if (desired_nr_to_write > max_pages)
-                desired_nr_to_write = max_pages;
-
-        if (wbc->nr_to_write < desired_nr_to_write) {
-                nr_to_writebump = desired_nr_to_write - wbc->nr_to_write;
-                wbc->nr_to_write = desired_nr_to_write;
-        }
-
 retry:
         if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
                 tag_pages_for_writeback(mapping, index, end);
@@ -2637,7 +2542,6 @@ retry:
                 mapping->writeback_index = done_index;
 
 out_writepages:
-        wbc->nr_to_write -= nr_to_writebump;
         wbc->range_start = range_start;
         trace_ext4_da_writepages_result(inode, wbc, ret, pages_written);
         return ret;