summaryrefslogtreecommitdiff
path: root/drivers/md/dm-cache-background-tracker.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/md/dm-cache-background-tracker.c')
-rw-r--r--drivers/md/dm-cache-background-tracker.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/md/dm-cache-background-tracker.c b/drivers/md/dm-cache-background-tracker.c
index 707233891291..1d0af0a21fc7 100644
--- a/drivers/md/dm-cache-background-tracker.c
+++ b/drivers/md/dm-cache-background-tracker.c
@@ -161,8 +161,17 @@ EXPORT_SYMBOL_GPL(btracker_nr_demotions_queued);
static bool max_work_reached(struct background_tracker *b)
{
- // FIXME: finish
- return false;
+ return atomic_read(&b->pending_promotes) +
+ atomic_read(&b->pending_writebacks) +
+ atomic_read(&b->pending_demotes) >= b->max_work;
+}
+
+struct bt_work *alloc_work(struct background_tracker *b)
+{
+ if (max_work_reached(b))
+ return NULL;
+
+ return kmem_cache_alloc(b->work_cache, GFP_NOWAIT);
}
int btracker_queue(struct background_tracker *b,
@@ -174,10 +183,7 @@ int btracker_queue(struct background_tracker *b,
if (pwork)
*pwork = NULL;
- if (max_work_reached(b))
- return -ENOMEM;
-
- w = kmem_cache_alloc(b->work_cache, GFP_NOWAIT);
+ w = alloc_work(b);
if (!w)
return -ENOMEM;