Hi Jens, Here are the patches for Linux v4.21. The patches from me are for a set of disabled-by-default optimization for writeback cache mode, which are used by some users I know. Guoju Fang contributes a patch to add number of keys in trace_bcache_journal_write(). And there are 6 patchges are from Shenghui Wang, which removes an unncessary NULL check for debugfs_remove_recursive() and debugfs_remove(), adds useful code comments for bcache, and improves sysfs information display for bcache writeback rate parameters. We don't have important or big change in this run. Please take these patches. Thanks in advance. Coly Li --- Coly Li (5): bcache: introduce force_wake_up_gc() bcache: option to automatically run gc thread after writeback accomplished bcache: add MODULE_DESCRIPTION information bcache: make cutoff_writeback and cutoff_writeback_sync tunnable bcache: set writeback_percent in a flexible range Guoju Fang (1): bcache: print number of keys in trace_bcache_journal_write Shenghui Wang (6): bcache: add comment for cache_set->fill_iter bcache: do not check if debug dentry is ERR or NULL explicitly on remove bcache: update comment for bch_data_insert bcache: update comment in sysfs.c bcache: do not mark writeback_running until backing dev attached to cache_set bcache: cannot set writeback_running via sysfs if no writeback kthread created drivers/md/bcache/bcache.h | 20 +++++++++++++- drivers/md/bcache/btree.c | 5 ++++ drivers/md/bcache/btree.h | 18 +++++++++++++ drivers/md/bcache/debug.c | 3 +-- drivers/md/bcache/journal.c | 2 +- drivers/md/bcache/request.c | 6 ++--- drivers/md/bcache/super.c | 48 +++++++++++++++++++++++++++++++--- drivers/md/bcache/sysfs.c | 61 +++++++++++++++++++++++++++++-------------- drivers/md/bcache/writeback.c | 30 ++++++++++++++++++++- drivers/md/bcache/writeback.h | 12 +++++++-- include/trace/events/bcache.h | 27 ++++++++++++++++--- 11 files changed, 195 insertions(+), 37 deletions(-) -- 2.16.4