github/ocf
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Introduce asynchronous cache lock

Browse Source 
Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
This commit is contained in:
Robert Baldyga
2019-05-13 10:42:00 +02:00
parent b609164f78
commit 8a82be339f
13 changed files with 531 additions and 161 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/mngt/ocf_mngt_cache.c
View File

@@ -17,6 +17,7 @@
#include "../utils/utils_cache_line.h"
#include "../utils/utils_pipeline.h"
#include "../utils/utils_refcnt.h"
#include "../utils/utils_async_lock.h"
#include "../concurrency/ocf_concurrency.h"
#include "../eviction/ops.h"
#include "../ocf_ctx_priv.h"
@@ -551,8 +552,15 @@ static int _ocf_mngt_init_new_cache(struct ocf_cachemng_init_params *params)
if (!cache)
return -OCF_ERR_NO_MEM;
if (env_rwsem_init(&cache->lock) ||
env_mutex_init(&cache->flush_mutex)) {
if (ocf_mngt_cache_lock_init(cache)) {
env_vfree(cache);
return -OCF_ERR_NO_MEM;
}
/* Lock cache during setup - this trylock should always succeed */
ENV_BUG_ON(ocf_mngt_cache_trylock(cache));
if (env_mutex_init(&cache->flush_mutex)) {
env_vfree(cache);
return -OCF_ERR_NO_MEM;
}
@@ -694,7 +702,6 @@ static int _ocf_mngt_init_prepare_cache(struct ocf_cachemng_init_params *param,
cache->backfill.max_queue_size = cfg->backfill.max_queue_size;
cache->backfill.queue_unblock_size = cfg->backfill.queue_unblock_size;
env_rwsem_down_write(&cache->lock); /* Lock cache during setup */
param->flags.cache_locked = true;
cache->pt_unaligned_io = cfg->pt_unaligned_io;
@@ -1216,17 +1223,11 @@ static int _ocf_mngt_cache_start(ocf_ctx_t ctx, ocf_cache_t *cache,
ocf_ctx_get(ctx);
if (params.locked) {
/* Increment reference counter to match cache_lock /
cache_unlock convention. User is expected to call
ocf_mngt_cache_unlock in future which would up the
semaphore as well as decrement ref_count. */
ocf_refcnt_inc(&(*cache)->refcnt.cache);
} else {
if (!params.locked) {
/* User did not request to lock cache instance after creation -
up the semaphore here since we have acquired the lock to
unlock it here since we have acquired the lock to
perform management operations. */
env_rwsem_up_write(&(*cache)->lock);
ocf_mngt_cache_unlock(*cache);
params.flags.cache_locked = false;
}