diff options
| author | Kent Overstreet <koverstreet@google.com> | 2013-04-27 02:39:55 +0400 |
|---|---|---|
| committer | Kent Overstreet <koverstreet@google.com> | 2013-06-27 04:09:15 +0400 |
| commit | c37511b863f36c1cc6e18440717fd4cc0e881b8a (patch) | |
| tree | 64d82c648bd092f38c35c4b808411bc1cdb3a9f0 /drivers/md/bcache/alloc.c | |
| parent | 5794351146199b9ac67a5ab1beab82be8bfd7b5d (diff) | |
| download | linux-c37511b863f36c1cc6e18440717fd4cc0e881b8a.tar.xz | |
bcache: Fix/revamp tracepoints
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 <koverstreet@google.com>
Diffstat (limited to 'drivers/md/bcache/alloc.c')
| -rw-r--r-- | drivers/md/bcache/alloc.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c index 38428f46ea74..b54b73b9b2b7 100644 --- a/drivers/md/bcache/alloc.c +++ b/drivers/md/bcache/alloc.c @@ -65,6 +65,7 @@ #include <linux/kthread.h> #include <linux/random.h> +#include <trace/events/bcache.h> #define MAX_IN_FLIGHT_DISCARDS 8U @@ -351,10 +352,7 @@ static void invalidate_buckets(struct cache *ca) break; } - pr_debug("free %zu/%zu free_inc %zu/%zu unused %zu/%zu", - fifo_used(&ca->free), ca->free.size, - fifo_used(&ca->free_inc), ca->free_inc.size, - fifo_used(&ca->unused), ca->unused.size); + trace_bcache_alloc_invalidate(ca); } #define allocator_wait(ca, cond) \ @@ -473,9 +471,7 @@ again: return r; } - pr_debug("alloc failure: blocked %i free %zu free_inc %zu unused %zu", - atomic_read(&ca->set->prio_blocked), fifo_used(&ca->free), - fifo_used(&ca->free_inc), fifo_used(&ca->unused)); + trace_bcache_alloc_fail(ca); if (cl) { closure_wait(&ca->set->bucket_wait, cl); |