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Diffstat (limited to 'drivers/md/bcache/alloc.c')
-rw-r--r--drivers/md/bcache/alloc.c46
1 files changed, 25 insertions, 21 deletions
diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c
index 048f294..e45f557 100644
--- a/drivers/md/bcache/alloc.c
+++ b/drivers/md/bcache/alloc.c
@@ -63,7 +63,10 @@
#include "bcache.h"
#include "btree.h"
+#include <linux/freezer.h>
+#include <linux/kthread.h>
#include <linux/random.h>
+#include <trace/events/bcache.h>
#define MAX_IN_FLIGHT_DISCARDS 8U
@@ -151,7 +154,7 @@ static void discard_finish(struct work_struct *w)
mutex_unlock(&ca->set->bucket_lock);
closure_wake_up(&ca->set->bucket_wait);
- wake_up(&ca->set->alloc_wait);
+ wake_up_process(ca->alloc_thread);
closure_put(&ca->set->cl);
}
@@ -350,38 +353,30 @@ 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) \
do { \
- DEFINE_WAIT(__wait); \
- \
while (1) { \
- prepare_to_wait(&ca->set->alloc_wait, \
- &__wait, TASK_INTERRUPTIBLE); \
+ set_current_state(TASK_INTERRUPTIBLE); \
if (cond) \
break; \
\
mutex_unlock(&(ca)->set->bucket_lock); \
- if (test_bit(CACHE_SET_STOPPING_2, &ca->set->flags)) { \
- finish_wait(&ca->set->alloc_wait, &__wait); \
- closure_return(cl); \
- } \
+ if (kthread_should_stop()) \
+ return 0; \
\
+ try_to_freeze(); \
schedule(); \
mutex_lock(&(ca)->set->bucket_lock); \
} \
- \
- finish_wait(&ca->set->alloc_wait, &__wait); \
+ __set_current_state(TASK_RUNNING); \
} while (0)
-void bch_allocator_thread(struct closure *cl)
+static int bch_allocator_thread(void *arg)
{
- struct cache *ca = container_of(cl, struct cache, alloc);
+ struct cache *ca = arg;
mutex_lock(&ca->set->bucket_lock);
@@ -442,7 +437,7 @@ long bch_bucket_alloc(struct cache *ca, unsigned watermark, struct closure *cl)
{
long r = -1;
again:
- wake_up(&ca->set->alloc_wait);
+ wake_up_process(ca->alloc_thread);
if (fifo_used(&ca->free) > ca->watermark[watermark] &&
fifo_pop(&ca->free, r)) {
@@ -476,9 +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);
@@ -552,6 +545,17 @@ int bch_bucket_alloc_set(struct cache_set *c, unsigned watermark,
/* Init */
+int bch_cache_allocator_start(struct cache *ca)
+{
+ struct task_struct *k = kthread_run(bch_allocator_thread,
+ ca, "bcache_allocator");
+ if (IS_ERR(k))
+ return PTR_ERR(k);
+
+ ca->alloc_thread = k;
+ return 0;
+}
+
void bch_cache_allocator_exit(struct cache *ca)
{
struct discard *d;