user/sven/linux.git/drivers/md/bcache/sysfs.c, branch v4.9.2

bcache: remove nested function usage

2014-03-18T19:39:28Z

Uninlined nested functions can cause crashes when using ftrace, as they don't follow the normal calling convention and confuse the ftrace function graph tracer as it examines the stack. Also, nested functions are supported as a gcc extension, but may fail on other compilers (e.g. llvm). Signed-off-by: John Sheu

bcache: Rework btree cache reserve handling

2014-03-18T19:23:35Z

This changes the bucket allocation reserves to use _real_ reserves - separate freelists - instead of watermarks, which if nothing else makes the current code saner to reason about and is going to be important in the future when we add support for multiple btrees. It also adds btree_check_reserve(), which checks (and locks) the reserves for both bucket allocation and memory allocation for btree nodes; the old code just kinda sorta assumed that since (e.g. for btree node splits) it had the root locked and that meant no other threads could try to make use of the same reserve; this technically should have been ok for memory allocation (we should always have a reserve for memory allocation (the btree node cache is used as a reserve and we preallocate it)), but multiple btrees will mean that locking the root won't be sufficient anymore, and for the bucket allocation reserve it was technically possible for the old code to deadlock. Signed-off-by: Kent Overstreet

bcache: Improve priority_stats

2014-03-18T19:22:35Z

Break down data into clean data/dirty data/metadata. Signed-off-by: Kent Overstreet

bcache: Minor fixes from kbuild robot

2014-01-29T21:06:41Z

Signed-off-by: Kent Overstreet

bcache: Convert btree_iter to struct btree_keys

2014-01-08T21:05:13Z

More work to disentangle bset.c from struct btree Signed-off-by: Kent Overstreet

bcache: Refactor bset_tree sysfs stats

2014-01-08T21:05:13Z

We're in the process of turning bset.c into library code, so none of the code in that file should know about struct cache_set or struct btree - so, move the btree traversal part of the stats code to sysfs.c. Signed-off-by: Kent Overstreet

bcache: Add struct btree_keys

2014-01-08T21:05:13Z

Soon, bset.c won't need to depend on struct btree. Signed-off-by: Kent Overstreet

bcache: Add struct bset_sort_state

2014-01-08T21:05:12Z

More disentangling bset.c from the rest of the bcache code - soon, the sorting routines won't have any dependencies on any outside structs. Signed-off-by: Kent Overstreet

bcache: Rework allocator reserves

2014-01-08T21:05:09Z

We need a reserve for allocating buckets for new btree nodes - and now that we've got multiple btrees, it really needs to be per btree. This reworks the reserves so we've got separate freelists for each reserve instead of watermarks, which seems to make things a bit cleaner, and it adds some code so that btree_split() can make sure the reserve is available before it starts. Signed-off-by: Kent Overstreet

bcache: New writeback PD controller

2013-12-16T22:22:59Z

The old writeback PD controller could get into states where it had throttled all the way down and take way too long to recover - it was too complicated to really understand what it was doing. This rewrites a good chunk of it to hopefully be simpler and make more sense, and it also pays more attention to units which should make the behaviour a bit easier to understand. Signed-off-by: Kent Overstreet