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| author | Kent Overstreet <kmo@daterainc.com> | 2014-02-13 03:43:32 +0100 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2014-03-18 20:22:35 +0100 |
| commit | 7159b1ad3dded9da040b5c608acf3d52d50f661e (patch) | |
| tree | 3ec196333d8ae22e359dc7d16fe8d48b8352fbea /drivers/md/bcache/alloc.c | |
| parent | bcache: Kill dead cgroup code (diff) | |
| download | linux-7159b1ad3dded9da040b5c608acf3d52d50f661e.tar.xz linux-7159b1ad3dded9da040b5c608acf3d52d50f661e.zip | |
bcache: Better alloc tracepoints
Change the invalidate tracepoint to indicate how much data we're invalidating,
and change the alloc tracepoints to indicate what offset they're for.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'drivers/md/bcache/alloc.c')
| -rw-r--r-- | drivers/md/bcache/alloc.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c index c0d37d082443..a3e1427945f2 100644 --- a/drivers/md/bcache/alloc.c +++ b/drivers/md/bcache/alloc.c @@ -162,10 +162,15 @@ static bool can_invalidate_bucket(struct cache *ca, struct bucket *b) static void invalidate_one_bucket(struct cache *ca, struct bucket *b) { + size_t bucket = b - ca->buckets; + + if (GC_SECTORS_USED(b)) + trace_bcache_invalidate(ca, bucket); + bch_inc_gen(ca, b); b->prio = INITIAL_PRIO; atomic_inc(&b->pin); - fifo_push(&ca->free_inc, b - ca->buckets); + fifo_push(&ca->free_inc, bucket); } /* @@ -301,8 +306,6 @@ static void invalidate_buckets(struct cache *ca) invalidate_buckets_random(ca); break; } - - trace_bcache_alloc_invalidate(ca); } #define allocator_wait(ca, cond) \ @@ -408,8 +411,10 @@ long bch_bucket_alloc(struct cache *ca, unsigned reserve, bool wait) fifo_pop(&ca->free[reserve], r)) goto out; - if (!wait) + if (!wait) { + trace_bcache_alloc_fail(ca, reserve); return -1; + } do { prepare_to_wait(&ca->set->bucket_wait, &w, @@ -425,6 +430,8 @@ long bch_bucket_alloc(struct cache *ca, unsigned reserve, bool wait) out: wake_up_process(ca->alloc_thread); + trace_bcache_alloc(ca, reserve); + if (expensive_debug_checks(ca->set)) { size_t iter; long i; |