Merge remote-tracking branches 'asoc/fix/tlv320aic3x' and 'asoc/fix/wm8962' into...

[linux-drm-fsl-dcu.git] / fs / fs-writeback.c

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 587ac08eabb62bcd47c0a90309e0442262eafd39..091a36444972fa0b746118b0cc58ca2a3dcaa97f 100644 (file)
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1481,6 +1481,21 @@ static long writeback_sb_inodes(struct super_block *sb,
                wbc_detach_inode(&wbc);
                work->nr_pages -= write_chunk - wbc.nr_to_write;
                wrote += write_chunk - wbc.nr_to_write;
+
+               if (need_resched()) {
+                       /*
+                        * We're trying to balance between building up a nice
+                        * long list of IOs to improve our merge rate, and
+                        * getting those IOs out quickly for anyone throttling
+                        * in balance_dirty_pages().  cond_resched() doesn't
+                        * unplug, so get our IOs out the door before we
+                        * give up the CPU.
+                        */
+                       blk_flush_plug(current);
+                       cond_resched();
+               }
+
+
                spin_lock(&wb->list_lock);
                spin_lock(&inode->i_lock);
                if (!(inode->i_state & I_DIRTY_ALL))
@@ -1488,7 +1503,7 @@ static long writeback_sb_inodes(struct super_block *sb,
                requeue_inode(inode, wb, &wbc);
                inode_sync_complete(inode);
                spin_unlock(&inode->i_lock);
-               cond_resched_lock(&wb->list_lock);
+
                /*
                 * bail out to wb_writeback() often enough to check
                 * background threshold and other termination conditions.