[PATCH 4/6] writeback: pay attention to wbc->nr_to_write in write_cache_pages

[Christoph Hellwig]

Looks good.  Can please get this in ASAP, including -stable?

> This commit adds a ->writepage tracepoint inside write_cache_pages() (how the
> above trace was generated) and does the revert manually leaving the subsequent
> bug fixes intact. ext4 is not affected by this as a previous commit in the
> series stops ext4 from using the generic function.

It doesn't anymore now that you've split it out..