bcache: Add a real GC_MARK_RECLAIMABLE
This means the garbage collection code can better check for data and metadata
pointers to the same buckets.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c
index a3e1427..5ba4eae 100644
--- a/drivers/md/bcache/alloc.c
+++ b/drivers/md/bcache/alloc.c
@@ -155,7 +155,8 @@
static bool can_invalidate_bucket(struct cache *ca, struct bucket *b)
{
- return GC_MARK(b) == GC_MARK_RECLAIMABLE &&
+ return (!GC_MARK(b) ||
+ GC_MARK(b) == GC_MARK_RECLAIMABLE) &&
!atomic_read(&b->pin) &&
can_inc_bucket_gen(b);
}
@@ -475,7 +476,7 @@
for (i = 0; i < KEY_PTRS(k); i++) {
struct bucket *b = PTR_BUCKET(c, k, i);
- SET_GC_MARK(b, GC_MARK_RECLAIMABLE);
+ SET_GC_MARK(b, 0);
SET_GC_SECTORS_USED(b, 0);
bch_bucket_add_unused(PTR_CACHE(c, k, i), b);
}