/*----------------------------------------------------------------*/
-static unsigned long *alloc_bitset(unsigned nr_entries)
-{
- size_t s = sizeof(unsigned long) * dm_div_up(nr_entries, BITS_PER_LONG);
- return vzalloc(s);
-}
-
-static void free_bitset(unsigned long *bits)
-{
- vfree(bits);
-}
-
-/*----------------------------------------------------------------*/
-
/*
* Large, sequential ios are probably better left on the origin device since
* spindles tend to have good bandwidth.
struct hlist_node hlist;
struct list_head list;
dm_oblock_t oblock;
- dm_cblock_t cblock; /* valid iff in_cache */
/*
* FIXME: pack these better
*/
- bool in_cache:1;
bool dirty:1;
unsigned hit_count;
unsigned generation;
unsigned tick;
};
+/*
+ * Rather than storing the cblock in an entry, we allocate all entries in
+ * an array, and infer the cblock from the entry position.
+ *
+ * Free entries are linked together into a list.
+ */
+struct entry_pool {
+ struct entry *entries, *entries_end;
+ struct list_head free;
+ unsigned nr_allocated;
+};
+
+static int epool_init(struct entry_pool *ep, unsigned nr_entries)
+{
+ unsigned i;
+
+ ep->entries = vzalloc(sizeof(struct entry) * nr_entries);
+ if (!ep->entries)
+ return -ENOMEM;
+
+ ep->entries_end = ep->entries + nr_entries;
+
+ INIT_LIST_HEAD(&ep->free);
+ for (i = 0; i < nr_entries; i++)
+ list_add(&ep->entries[i].list, &ep->free);
+
+ ep->nr_allocated = 0;
+
+ return 0;
+}
+
+static void epool_exit(struct entry_pool *ep)
+{
+ vfree(ep->entries);
+}
+
+static struct entry *alloc_entry(struct entry_pool *ep)
+{
+ struct entry *e;
+
+ if (list_empty(&ep->free))
+ return NULL;
+
+ e = list_entry(list_pop(&ep->free), struct entry, list);
+ INIT_LIST_HEAD(&e->list);
+ INIT_HLIST_NODE(&e->hlist);
+ ep->nr_allocated++;
+
+ return e;
+}
+
+/*
+ * This assumes the cblock hasn't already been allocated.
+ */
+static struct entry *alloc_particular_entry(struct entry_pool *ep, dm_cblock_t cblock)
+{
+ struct entry *e = ep->entries + from_cblock(cblock);
+ list_del(&e->list);
+
+ INIT_LIST_HEAD(&e->list);
+ INIT_HLIST_NODE(&e->hlist);
+ ep->nr_allocated++;
+
+ return e;
+}
+
+static void free_entry(struct entry_pool *ep, struct entry *e)
+{
+ BUG_ON(!ep->nr_allocated);
+ ep->nr_allocated--;
+ INIT_HLIST_NODE(&e->hlist);
+ list_add(&e->list, &ep->free);
+}
+
+static bool epool_empty(struct entry_pool *ep)
+{
+ return list_empty(&ep->free);
+}
+
+static bool in_pool(struct entry_pool *ep, struct entry *e)
+{
+ return e >= ep->entries && e < ep->entries_end;
+}
+
+static dm_cblock_t infer_cblock(struct entry_pool *ep, struct entry *e)
+{
+ return to_cblock(e - ep->entries);
+}
+
+/*----------------------------------------------------------------*/
+
struct mq_policy {
struct dm_cache_policy policy;
dm_cblock_t cache_size;
struct io_tracker tracker;
+ /*
+ * Entries come from two pools, one of pre-cache entries, and one
+ * for the cache proper.
+ */
+ struct entry_pool pre_cache_pool;
+ struct entry_pool cache_pool;
+
/*
* We maintain three queues of entries. The cache proper,
* consisting of a clean and dirty queue, contains the currently
*/
unsigned promote_threshold;
- /*
- * We need cache_size entries for the cache, and choose to have
- * cache_size entries for the pre_cache too. One motivation for
- * using the same size is to make the hit counts directly
- * comparable between pre_cache and cache.
- */
- unsigned nr_entries;
- unsigned nr_entries_allocated;
- struct list_head free;
-
- /*
- * Cache blocks may be unallocated. We store this info in a
- * bitset.
- */
- unsigned long *allocation_bitset;
- unsigned nr_cblocks_allocated;
- unsigned find_free_nr_words;
- unsigned find_free_last_word;
-
/*
* The hash table allows us to quickly find an entry by origin
* block. Both pre_cache and cache entries are in here.
struct hlist_head *table;
};
-/*----------------------------------------------------------------*/
-/* Free/alloc mq cache entry structures. */
-static void concat_queue(struct list_head *lh, struct queue *q)
-{
- unsigned level;
-
- for (level = 0; level < NR_QUEUE_LEVELS; level++)
- list_splice(q->qs + level, lh);
-}
-
-static void free_entries(struct mq_policy *mq)
-{
- struct entry *e, *tmp;
-
- concat_queue(&mq->free, &mq->pre_cache);
- concat_queue(&mq->free, &mq->cache_clean);
- concat_queue(&mq->free, &mq->cache_dirty);
-
- list_for_each_entry_safe(e, tmp, &mq->free, list)
- kmem_cache_free(mq_entry_cache, e);
-}
-
-static int alloc_entries(struct mq_policy *mq, unsigned elts)
-{
- unsigned u = mq->nr_entries;
-
- INIT_LIST_HEAD(&mq->free);
- mq->nr_entries_allocated = 0;
-
- while (u--) {
- struct entry *e = kmem_cache_zalloc(mq_entry_cache, GFP_KERNEL);
-
- if (!e) {
- free_entries(mq);
- return -ENOMEM;
- }
-
-
- list_add(&e->list, &mq->free);
- }
-
- return 0;
-}
-
/*----------------------------------------------------------------*/
/*
/*----------------------------------------------------------------*/
-/*
- * Allocates a new entry structure. The memory is allocated in one lump,
- * so we just handing it out here. Returns NULL if all entries have
- * already been allocated. Cannot fail otherwise.
- */
-static struct entry *alloc_entry(struct mq_policy *mq)
-{
- struct entry *e;
-
- if (mq->nr_entries_allocated >= mq->nr_entries) {
- BUG_ON(!list_empty(&mq->free));
- return NULL;
- }
-
- e = list_entry(list_pop(&mq->free), struct entry, list);
- INIT_LIST_HEAD(&e->list);
- INIT_HLIST_NODE(&e->hlist);
-
- mq->nr_entries_allocated++;
- return e;
-}
-
-/*----------------------------------------------------------------*/
-
-/*
- * Mark cache blocks allocated or not in the bitset.
- */
-static void alloc_cblock(struct mq_policy *mq, dm_cblock_t cblock)
-{
- BUG_ON(from_cblock(cblock) > from_cblock(mq->cache_size));
- BUG_ON(test_bit(from_cblock(cblock), mq->allocation_bitset));
-
- set_bit(from_cblock(cblock), mq->allocation_bitset);
- mq->nr_cblocks_allocated++;
-}
-
-static void free_cblock(struct mq_policy *mq, dm_cblock_t cblock)
-{
- BUG_ON(from_cblock(cblock) > from_cblock(mq->cache_size));
- BUG_ON(!test_bit(from_cblock(cblock), mq->allocation_bitset));
-
- clear_bit(from_cblock(cblock), mq->allocation_bitset);
- mq->nr_cblocks_allocated--;
-}
-
static bool any_free_cblocks(struct mq_policy *mq)
{
- return mq->nr_cblocks_allocated < from_cblock(mq->cache_size);
+ return !epool_empty(&mq->cache_pool);
}
static bool any_clean_cblocks(struct mq_policy *mq)
return !queue_empty(&mq->cache_clean);
}
-/*
- * Fills result out with a cache block that isn't in use, or return
- * -ENOSPC. This does _not_ mark the cblock as allocated, the caller is
- * reponsible for that.
- */
-static int __find_free_cblock(struct mq_policy *mq, unsigned begin, unsigned end,
- dm_cblock_t *result, unsigned *last_word)
-{
- int r = -ENOSPC;
- unsigned w;
-
- for (w = begin; w < end; w++) {
- /*
- * ffz is undefined if no zero exists
- */
- if (mq->allocation_bitset[w] != ~0UL) {
- *last_word = w;
- *result = to_cblock((w * BITS_PER_LONG) + ffz(mq->allocation_bitset[w]));
- if (from_cblock(*result) < from_cblock(mq->cache_size))
- r = 0;
-
- break;
- }
- }
-
- return r;
-}
-
-static int find_free_cblock(struct mq_policy *mq, dm_cblock_t *result)
-{
- int r;
-
- if (!any_free_cblocks(mq))
- return -ENOSPC;
-
- r = __find_free_cblock(mq, mq->find_free_last_word, mq->find_free_nr_words, result, &mq->find_free_last_word);
- if (r == -ENOSPC && mq->find_free_last_word)
- r = __find_free_cblock(mq, 0, mq->find_free_last_word, result, &mq->find_free_last_word);
-
- return r;
-}
-
/*----------------------------------------------------------------*/
/*
return min((unsigned) ilog2(e->hit_count), NR_QUEUE_LEVELS - 1u);
}
+static bool in_cache(struct mq_policy *mq, struct entry *e)
+{
+ return in_pool(&mq->cache_pool, e);
+}
+
/*
* Inserts the entry into the pre_cache or the cache. Ensures the cache
- * block is marked as allocated if necc. Inserts into the hash table. Sets the
- * tick which records when the entry was last moved about.
+ * block is marked as allocated if necc. Inserts into the hash table.
+ * Sets the tick which records when the entry was last moved about.
*/
static void push(struct mq_policy *mq, struct entry *e)
{
e->tick = mq->tick;
hash_insert(mq, e);
- if (e->in_cache) {
- alloc_cblock(mq, e->cblock);
+ if (in_cache(mq, e))
queue_push(e->dirty ? &mq->cache_dirty : &mq->cache_clean,
queue_level(e), &e->list);
- } else
+ else
queue_push(&mq->pre_cache, queue_level(e), &e->list);
}
/*
* Removes an entry from pre_cache or cache. Removes from the hash table.
- * Frees off the cache block if necc.
*/
static void del(struct mq_policy *mq, struct entry *e)
{
queue_remove(&e->list);
hash_remove(e);
- if (e->in_cache)
- free_cblock(mq, e->cblock);
}
/*
e = container_of(h, struct entry, list);
hash_remove(e);
- if (e->in_cache)
- free_cblock(mq, e->cblock);
return e;
}
struct list_head *head;
struct entry *e;
- if ((mq->hit_count >= mq->generation_period) &&
- (mq->nr_cblocks_allocated == from_cblock(mq->cache_size))) {
-
+ if ((mq->hit_count >= mq->generation_period) && (epool_empty(&mq->cache_pool))) {
mq->hit_count = 0;
mq->generation++;
* - set the hit count to a hard coded value other than 1, eg, is it better
* if it goes in at level 2?
*/
-static int demote_cblock(struct mq_policy *mq, dm_oblock_t *oblock, dm_cblock_t *cblock)
+static int demote_cblock(struct mq_policy *mq, dm_oblock_t *oblock)
{
struct entry *demoted = pop(mq, &mq->cache_clean);
*/
return -ENOSPC;
- *cblock = demoted->cblock;
*oblock = demoted->oblock;
- demoted->in_cache = false;
- demoted->dirty = false;
- demoted->hit_count = 1;
- push(mq, demoted);
+ free_entry(&mq->cache_pool, demoted);
+
+ /*
+ * We used to put the demoted block into the pre-cache, but I think
+ * it's simpler to just let it work it's way up from zero again.
+ * Stops blocks flickering in and out of the cache.
+ */
return 0;
}
{
requeue_and_update_tick(mq, e);
- if (e->in_cache) {
+ if (in_cache(mq, e)) {
result->op = POLICY_HIT;
- result->cblock = e->cblock;
+ result->cblock = infer_cblock(&mq->cache_pool, e);
}
return 0;
struct policy_result *result)
{
int r;
- dm_cblock_t cblock;
+ struct entry *new_e;
- if (find_free_cblock(mq, &cblock) == -ENOSPC) {
+ /* Ensure there's a free cblock in the cache */
+ if (epool_empty(&mq->cache_pool)) {
result->op = POLICY_REPLACE;
- r = demote_cblock(mq, &result->old_oblock, &cblock);
+ r = demote_cblock(mq, &result->old_oblock);
if (r) {
result->op = POLICY_MISS;
return 0;
} else
result->op = POLICY_NEW;
- result->cblock = e->cblock = cblock;
+ new_e = alloc_entry(&mq->cache_pool);
+ BUG_ON(!new_e);
+
+ new_e->oblock = e->oblock;
+ new_e->dirty = false;
+ new_e->hit_count = e->hit_count;
+ new_e->generation = e->generation;
+ new_e->tick = e->tick;
del(mq, e);
- e->in_cache = true;
- e->dirty = false;
- push(mq, e);
+ free_entry(&mq->pre_cache_pool, e);
+ push(mq, new_e);
+
+ result->cblock = infer_cblock(&mq->cache_pool, new_e);
return 0;
}
return r;
}
-static void insert_entry_in_pre_cache(struct mq_policy *mq,
- struct entry *e, dm_oblock_t oblock)
-{
- e->in_cache = false;
- e->dirty = false;
- e->oblock = oblock;
- e->hit_count = 1;
- e->generation = mq->generation;
- push(mq, e);
-}
-
static void insert_in_pre_cache(struct mq_policy *mq,
dm_oblock_t oblock)
{
- struct entry *e = alloc_entry(mq);
+ struct entry *e = alloc_entry(&mq->pre_cache_pool);
if (!e)
/*
return;
}
- insert_entry_in_pre_cache(mq, e, oblock);
+ e->dirty = false;
+ e->oblock = oblock;
+ e->hit_count = 1;
+ e->generation = mq->generation;
+ push(mq, e);
}
static void insert_in_cache(struct mq_policy *mq, dm_oblock_t oblock,
{
int r;
struct entry *e;
- dm_cblock_t cblock;
- if (find_free_cblock(mq, &cblock) == -ENOSPC) {
- r = demote_cblock(mq, &result->old_oblock, &cblock);
+ if (epool_empty(&mq->cache_pool)) {
+ result->op = POLICY_REPLACE;
+ r = demote_cblock(mq, &result->old_oblock);
if (unlikely(r)) {
result->op = POLICY_MISS;
insert_in_pre_cache(mq, oblock);
/*
* This will always succeed, since we've just demoted.
*/
- e = pop(mq, &mq->pre_cache);
- result->op = POLICY_REPLACE;
+ e = alloc_entry(&mq->cache_pool);
+ BUG_ON(!e);
} else {
- e = alloc_entry(mq);
- if (unlikely(!e))
- e = pop(mq, &mq->pre_cache);
-
- if (unlikely(!e)) {
- result->op = POLICY_MISS;
- return;
- }
-
+ e = alloc_entry(&mq->cache_pool);
result->op = POLICY_NEW;
}
e->oblock = oblock;
- e->cblock = cblock;
- e->in_cache = true;
e->dirty = false;
e->hit_count = 1;
e->generation = mq->generation;
push(mq, e);
- result->cblock = e->cblock;
+ result->cblock = infer_cblock(&mq->cache_pool, e);
}
static int no_entry_found(struct mq_policy *mq, dm_oblock_t oblock,
int r = 0;
struct entry *e = hash_lookup(mq, oblock);
- if (e && e->in_cache)
+ if (e && in_cache(mq, e))
r = cache_entry_found(mq, e, result);
+
else if (iot_pattern(&mq->tracker) == PATTERN_SEQUENTIAL)
result->op = POLICY_MISS;
+
else if (e)
r = pre_cache_entry_found(mq, e, can_migrate, discarded_oblock,
data_dir, result);
+
else
r = no_entry_found(mq, oblock, can_migrate, discarded_oblock,
data_dir, result);
{
struct mq_policy *mq = to_mq_policy(p);
- free_bitset(mq->allocation_bitset);
kfree(mq->table);
- free_entries(mq);
+ epool_exit(&mq->cache_pool);
+ epool_exit(&mq->pre_cache_pool);
kfree(mq);
}
return -EWOULDBLOCK;
e = hash_lookup(mq, oblock);
- if (e && e->in_cache) {
- *cblock = e->cblock;
+ if (e && in_cache(mq, e)) {
+ *cblock = infer_cblock(&mq->cache_pool, e);
r = 0;
} else
r = -ENOENT;
return r;
}
-/*
- * FIXME: __mq_set_clear_dirty can block due to mutex.
- * Ideally a policy should not block in functions called
- * from the map() function. Explore using RCU.
- */
-static void __mq_set_clear_dirty(struct dm_cache_policy *p, dm_oblock_t oblock, bool set)
+static void __mq_set_clear_dirty(struct mq_policy *mq, dm_oblock_t oblock, bool set)
{
- struct mq_policy *mq = to_mq_policy(p);
struct entry *e;
- mutex_lock(&mq->lock);
e = hash_lookup(mq, oblock);
- if (!e)
- DMWARN("__mq_set_clear_dirty called for a block that isn't in the cache");
- else {
- BUG_ON(!e->in_cache);
+ BUG_ON(!e || !in_cache(mq, e));
- del(mq, e);
- e->dirty = set;
- push(mq, e);
- }
- mutex_unlock(&mq->lock);
+ del(mq, e);
+ e->dirty = set;
+ push(mq, e);
}
static void mq_set_dirty(struct dm_cache_policy *p, dm_oblock_t oblock)
{
- __mq_set_clear_dirty(p, oblock, true);
+ struct mq_policy *mq = to_mq_policy(p);
+
+ mutex_lock(&mq->lock);
+ __mq_set_clear_dirty(mq, oblock, true);
+ mutex_unlock(&mq->lock);
}
static void mq_clear_dirty(struct dm_cache_policy *p, dm_oblock_t oblock)
{
- __mq_set_clear_dirty(p, oblock, false);
+ struct mq_policy *mq = to_mq_policy(p);
+
+ mutex_lock(&mq->lock);
+ __mq_set_clear_dirty(mq, oblock, false);
+ mutex_unlock(&mq->lock);
}
static int mq_load_mapping(struct dm_cache_policy *p,
struct mq_policy *mq = to_mq_policy(p);
struct entry *e;
- e = alloc_entry(mq);
- if (!e)
- return -ENOMEM;
-
- e->cblock = cblock;
+ e = alloc_particular_entry(&mq->cache_pool, cblock);
e->oblock = oblock;
- e->in_cache = true;
e->dirty = false; /* this gets corrected in a minute */
e->hit_count = hint_valid ? hint : 1;
e->generation = mq->generation;
return 0;
}
+static int mq_save_hints(struct mq_policy *mq, struct queue *q,
+ policy_walk_fn fn, void *context)
+{
+ int r;
+ unsigned level;
+ struct entry *e;
+
+ for (level = 0; level < NR_QUEUE_LEVELS; level++)
+ list_for_each_entry(e, q->qs + level, list) {
+ r = fn(context, infer_cblock(&mq->cache_pool, e),
+ e->oblock, e->hit_count);
+ if (r)
+ return r;
+ }
+
+ return 0;
+}
+
static int mq_walk_mappings(struct dm_cache_policy *p, policy_walk_fn fn,
void *context)
{
struct mq_policy *mq = to_mq_policy(p);
int r = 0;
- struct entry *e;
- unsigned level;
mutex_lock(&mq->lock);
- for (level = 0; level < NR_QUEUE_LEVELS; level++)
- list_for_each_entry(e, &mq->cache_clean.qs[level], list) {
- r = fn(context, e->cblock, e->oblock, e->hit_count);
- if (r)
- goto out;
- }
-
- for (level = 0; level < NR_QUEUE_LEVELS; level++)
- list_for_each_entry(e, &mq->cache_dirty.qs[level], list) {
- r = fn(context, e->cblock, e->oblock, e->hit_count);
- if (r)
- goto out;
- }
+ r = mq_save_hints(mq, &mq->cache_clean, fn, context);
+ if (!r)
+ r = mq_save_hints(mq, &mq->cache_dirty, fn, context);
-out:
mutex_unlock(&mq->lock);
return r;
}
-static void mq_remove_mapping(struct dm_cache_policy *p, dm_oblock_t oblock)
+static void __remove_mapping(struct mq_policy *mq, dm_oblock_t oblock)
{
- struct mq_policy *mq = to_mq_policy(p);
struct entry *e;
- mutex_lock(&mq->lock);
-
e = hash_lookup(mq, oblock);
-
- BUG_ON(!e || !e->in_cache);
+ BUG_ON(!e || !in_cache(mq, e));
del(mq, e);
- e->in_cache = false;
- e->dirty = false;
- push(mq, e);
+ free_entry(&mq->cache_pool, e);
+}
+
+static void mq_remove_mapping(struct dm_cache_policy *p, dm_oblock_t oblock)
+{
+ struct mq_policy *mq = to_mq_policy(p);
+ mutex_lock(&mq->lock);
+ __remove_mapping(mq, oblock);
mutex_unlock(&mq->lock);
}
return -ENODATA;
*oblock = e->oblock;
- *cblock = e->cblock;
+ *cblock = infer_cblock(&mq->cache_pool, e);
e->dirty = false;
push(mq, e);
return r;
}
-static void force_mapping(struct mq_policy *mq,
- dm_oblock_t current_oblock, dm_oblock_t new_oblock)
+static void __force_mapping(struct mq_policy *mq,
+ dm_oblock_t current_oblock, dm_oblock_t new_oblock)
{
struct entry *e = hash_lookup(mq, current_oblock);
- BUG_ON(!e || !e->in_cache);
-
- del(mq, e);
- e->oblock = new_oblock;
- e->dirty = true;
- push(mq, e);
+ if (e && in_cache(mq, e)) {
+ del(mq, e);
+ e->oblock = new_oblock;
+ e->dirty = true;
+ push(mq, e);
+ }
}
static void mq_force_mapping(struct dm_cache_policy *p,
struct mq_policy *mq = to_mq_policy(p);
mutex_lock(&mq->lock);
- force_mapping(mq, current_oblock, new_oblock);
+ __force_mapping(mq, current_oblock, new_oblock);
mutex_unlock(&mq->lock);
}
struct mq_policy *mq = to_mq_policy(p);
mutex_lock(&mq->lock);
- r = to_cblock(mq->nr_cblocks_allocated);
+ r = to_cblock(mq->cache_pool.nr_allocated);
mutex_unlock(&mq->lock);
return r;
sector_t origin_size,
sector_t cache_block_size)
{
- int r;
struct mq_policy *mq = kzalloc(sizeof(*mq), GFP_KERNEL);
if (!mq)
init_policy_functions(mq);
iot_init(&mq->tracker, SEQUENTIAL_THRESHOLD_DEFAULT, RANDOM_THRESHOLD_DEFAULT);
-
mq->cache_size = cache_size;
+
+ if (epool_init(&mq->pre_cache_pool, from_cblock(cache_size))) {
+ DMERR("couldn't initialize pool of pre-cache entries");
+ goto bad_pre_cache_init;
+ }
+
+ if (epool_init(&mq->cache_pool, from_cblock(cache_size))) {
+ DMERR("couldn't initialize pool of cache entries");
+ goto bad_cache_init;
+ }
+
mq->tick_protected = 0;
mq->tick = 0;
mq->hit_count = 0;
mq->promote_threshold = 0;
mutex_init(&mq->lock);
spin_lock_init(&mq->tick_lock);
- mq->find_free_nr_words = dm_div_up(from_cblock(mq->cache_size), BITS_PER_LONG);
- mq->find_free_last_word = 0;
queue_init(&mq->pre_cache);
queue_init(&mq->cache_clean);
mq->generation_period = max((unsigned) from_cblock(cache_size), 1024U);
- mq->nr_entries = 2 * from_cblock(cache_size);
- r = alloc_entries(mq, mq->nr_entries);
- if (r)
- goto bad_cache_alloc;
-
- mq->nr_entries_allocated = 0;
- mq->nr_cblocks_allocated = 0;
-
mq->nr_buckets = next_power(from_cblock(cache_size) / 2, 16);
mq->hash_bits = ffs(mq->nr_buckets) - 1;
mq->table = kzalloc(sizeof(*mq->table) * mq->nr_buckets, GFP_KERNEL);
if (!mq->table)
goto bad_alloc_table;
- mq->allocation_bitset = alloc_bitset(from_cblock(cache_size));
- if (!mq->allocation_bitset)
- goto bad_alloc_bitset;
-
return &mq->policy;
-bad_alloc_bitset:
- kfree(mq->table);
bad_alloc_table:
- free_entries(mq);
-bad_cache_alloc:
+ epool_exit(&mq->cache_pool);
+bad_cache_init:
+ epool_exit(&mq->pre_cache_pool);
+bad_pre_cache_init:
kfree(mq);
return NULL;
static struct dm_cache_policy_type mq_policy_type = {
.name = "mq",
- .version = {1, 0, 0},
+ .version = {1, 1, 0},
.hint_size = 4,
.owner = THIS_MODULE,
.create = mq_create
static struct dm_cache_policy_type default_policy_type = {
.name = "default",
- .version = {1, 0, 0},
+ .version = {1, 1, 0},
.hint_size = 4,
.owner = THIS_MODULE,
.create = mq_create
projects / karo-tx-linux.git / blobdiff