linux.git/drivers/md/bcache/util.h, branch v4.1

bcache: Correct printing of btree_gc_max_duration_ms

2014-08-04T22:23:04+00:00

time_stats::btree_gc_max_duration_mc is not bit shifted by 8

Fixes BUG #138

Change-Id: I44fc6e1d0579674016acc533f1a546b080e5371a
Signed-off-by: Surbhi Palande

bcache: Convert debug code to btree_keys

2014-01-08T21:05:13+00:00

More work to disentangle various code from struct btree

Signed-off-by: Kent Overstreet

bcache: Remove/fix some header dependencies

2014-01-08T21:05:11+00:00

In the process of disentagling/libraryizing bset.c from the rest of the
bcache code.

Signed-off-by: Kent Overstreet

bcache: Fix heap_peek() macro

2013-12-16T22:22:57+00:00

Signed-off-by: Nicholas Swenson 
Signed-off-by: Kent Overstreet

bcache: Move spinlock into struct time_stats

2013-11-11T05:56:40+00:00

Minor cleanup.

Signed-off-by: Kent Overstreet

bcache: Debug code improvements

2013-11-11T05:56:34+00:00

Couple changes:
 * Consolidate bch_check_keys() and bch_check_key_order(), and move the
   checks that only check_key_order() could do to bch_btree_iter_next().

 * Get rid of CONFIG_BCACHE_EDEBUG - now, all that code is compiled in
   when CONFIG_BCACHE_DEBUG is enabled, and there's now a sysfs file to
   flip on the EDEBUG checks at runtime.

 * Dropped an old not terribly useful check in rw_unlock(), and
   refactored/improved a some of the other debug code.

Signed-off-by: Kent Overstreet

bcache: Pull on disk data structures out into a separate header

2013-11-11T05:56:33+00:00

Now, the on disk data structures are in a header that can be exported to
userspace - and having them all centralized is nice too.

Signed-off-by: Kent Overstreet

bcache: Fix a writeback performance regression

2013-09-24T21:41:43+00:00

Background writeback works by scanning the btree for dirty data and
adding those keys into a fixed size buffer, then for each dirty key in
the keybuf writing it to the backing device.

When read_dirty() finishes and it's time to scan for more dirty data, we
need to wait for the outstanding writeback IO to finish - they still
take up slots in the keybuf (so that foreground writes can check for
them to avoid races) - without that wait, we'll continually rescan when
we'll be able to add at most a key or two to the keybuf, and that takes
locks that starves foreground IO.  Doh.

Signed-off-by: Kent Overstreet 
Cc: linux-stable  # >= v3.10
Signed-off-by: Linus Torvalds

bcache: Use standard utility code

2013-07-01T21:43:53+00:00

Some of bcache's utility code has made it into the rest of the kernel,
so drop the bcache versions.

Bcache used to have a workaround for allocating from a bio set under
generic_make_request() (if you allocated more than once, the bios you
already allocated would get stuck on current->bio_list when you
submitted, and you'd risk deadlock) - bcache would mask out __GFP_WAIT
when allocating bios under generic_make_request() so that allocation
could fail and it could retry from workqueue. But bio_alloc_bioset() has
a workaround now, so we can drop this hack and the associated error
handling.

Signed-off-by: Kent Overstreet

bcache: Fix/revamp tracepoints

2013-06-27T00:09:15+00:00

The tracepoints were reworked to be more sensible, and fixed a null
pointer deref in one of the tracepoints.

Converted some of the pr_debug()s to tracepoints - this is partly a
performance optimization; it used to be that with DEBUG or
CONFIG_DYNAMIC_DEBUG pr_debug() was an empty macro; but at some point it
was changed to an empty inline function.

Some of the pr_debug() statements had rather expensive function calls as
part of the arguments, so this code was getting run unnecessarily even
on non debug kernels - in some fast paths, too.

Signed-off-by: Kent Overstreet