Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...

[karo-tx-linux.git] / fs / f2fs / data.c

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index e3b7cfa17b99c2568666eb201360cc6d538344cf..45abd60e2bff54323139b037ed1bccd1e534e96e 100644 (file)
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -134,7 +134,7 @@ void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi,
 
        io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype];
 
-       mutex_lock(&io->io_mutex);
+       down_write(&io->io_rwsem);
 
        /* change META to META_FLUSH in the checkpoint procedure */
        if (type >= META_FLUSH) {
@@ -142,7 +142,7 @@ void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi,
                io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO;
        }
        __submit_merged_bio(io);
-       mutex_unlock(&io->io_mutex);
+       up_write(&io->io_rwsem);
 }
 
 /*
@@ -180,7 +180,7 @@ void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page,
 
        verify_block_addr(sbi, blk_addr);
 
-       mutex_lock(&io->io_mutex);
+       down_write(&io->io_rwsem);
 
        if (!is_read)
                inc_page_count(sbi, F2FS_WRITEBACK);
@@ -204,7 +204,7 @@ alloc_new:
 
        io->last_block_in_bio = blk_addr;
 
-       mutex_unlock(&io->io_mutex);
+       up_write(&io->io_rwsem);
        trace_f2fs_submit_page_mbio(page, fio->rw, fio->type, blk_addr);
 }
 
@@ -844,8 +844,6 @@ redirty_out:
        return AOP_WRITEPAGE_ACTIVATE;
 }
 
-#define MAX_DESIRED_PAGES_WP   4096
-
 static int __f2fs_writepage(struct page *page, struct writeback_control *wbc,
                        void *data)
 {
@@ -862,7 +860,7 @@ static int f2fs_write_data_pages(struct address_space *mapping,
        struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
        bool locked = false;
        int ret;
-       long excess_nrtw = 0, desired_nrtw;
+       long diff;
 
        /* deal with chardevs and other special file */
        if (!mapping->a_ops->writepage)
@@ -870,13 +868,9 @@ static int f2fs_write_data_pages(struct address_space *mapping,
 
        if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE &&
                        get_dirty_dents(inode) < nr_pages_to_skip(sbi, DATA))
-               return 0;
+               goto skip_write;
 
-       if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) {
-               desired_nrtw = MAX_DESIRED_PAGES_WP;
-               excess_nrtw = desired_nrtw - wbc->nr_to_write;
-               wbc->nr_to_write = desired_nrtw;
-       }
+       diff = nr_pages_to_write(sbi, DATA, wbc);
 
        if (!S_ISDIR(inode->i_mode)) {
                mutex_lock(&sbi->writepages);
@@ -890,8 +884,12 @@ static int f2fs_write_data_pages(struct address_space *mapping,
 
        remove_dirty_dir_inode(inode);
 
-       wbc->nr_to_write -= excess_nrtw;
+       wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff);
        return ret;
+
+skip_write:
+       wbc->pages_skipped += get_dirty_dents(inode);
+       return 0;
 }
 
 static int f2fs_write_begin(struct file *file, struct address_space *mapping,
@@ -944,13 +942,19 @@ inline_data:
        if (dn.data_blkaddr == NEW_ADDR) {
                zero_user_segment(page, 0, PAGE_CACHE_SIZE);
        } else {
-               if (f2fs_has_inline_data(inode))
+               if (f2fs_has_inline_data(inode)) {
                        err = f2fs_read_inline_data(inode, page);
-               else
+                       if (err) {
+                               page_cache_release(page);
+                               return err;
+                       }
+               } else {
                        err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr,
                                                        READ_SYNC);
-               if (err)
-                       return err;
+                       if (err)
+                               return err;
+               }
+
                lock_page(page);
                if (unlikely(!PageUptodate(page))) {
                        f2fs_put_page(page, 1);