diff --git a/.gitignore b/.gitignore
index f44b86e2c..c277861b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 *.ko.*
 *.obj
 *.a
+tags
 Module.symvers
 Module.markers
 *.mod.c
diff --git a/Makefile b/Makefile
index 2d0b76a7a..054e39eb7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,6 @@
 #
 # Copyright(c) 2012-2022 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -20,6 +21,8 @@ ifneq ($(MAKECMDGOALS),srpm)
 ifneq ($(MAKECMDGOALS),deb)
 ifneq ($(MAKECMDGOALS),dsc)
 	cd $@ && $(MAKE) $(MAKECMDGOALS)
+casadm: modules
+	cd $@ && $(MAKE) $(MAKECMDGOALS)
 endif
 endif
 endif
diff --git a/casadm/Makefile b/casadm/Makefile
index 8ab0c4e87..d010125d3 100644
--- a/casadm/Makefile
+++ b/casadm/Makefile
@@ -152,7 +152,9 @@ $(OBJDIR)%.o: %.c
 ifeq ($(strip $(CAS_VERSION_MAIN)),)
 	$(error "No version file")
 endif
-	@$(CC) -c $(CFLAGS) -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@:%.o=%.d)" -o "$@" "$<"
+	@$(CC) -c $(CFLAGS) -MMD -o "$@" "$<"
+
+-include $(addprefix $(OBJDIR),$(OBJS:.o=.d))
 
 clean:
 	@echo "  CLEAN "
diff --git a/casadm/casadm.8 b/casadm/casadm.8
index 3a5d4e95b..16fc0bef1 100644
--- a/casadm/casadm.8
+++ b/casadm/casadm.8
@@ -88,7 +88,7 @@ Stop cache instance.
 Set runtime parameter for cache/core instance.
 
 .TP
-.B -G, --set-param
+.B -G, --get-param
 Get runtime parameter for cache/core instance.
 
 .TP
diff --git a/modules/cas_cache/context.c b/modules/cas_cache/context.c
index ed5b1cc29..94eb55a73 100644
--- a/modules/cas_cache/context.c
+++ b/modules/cas_cache/context.c
@@ -82,7 +82,7 @@ static int _cas_page_get_cpu(struct page *page)
 /*
  *
  */
-static ctx_data_t *__cas_ctx_data_alloc(uint32_t pages, bool zalloc)
+static ctx_data_t *__cas_ctx_data_alloc(uint32_t pages)
 {
 	struct blk_data *data;
 	uint32_t i;
@@ -116,14 +116,6 @@ static ctx_data_t *__cas_ctx_data_alloc(uint32_t pages, bool zalloc)
 		if (!data->vec[i].bv_page)
 			break;
 
-		if (zalloc) {
-			if (!page_addr) {
-				page_addr = page_address(
-						data->vec[i].bv_page);
-			}
-			memset(page_addr, 0, PAGE_SIZE);
-		}
-
 		data->vec[i].bv_len = PAGE_SIZE;
 		data->vec[i].bv_offset = 0;
 	}
@@ -153,12 +145,7 @@ static ctx_data_t *__cas_ctx_data_alloc(uint32_t pages, bool zalloc)
 
 ctx_data_t *cas_ctx_data_alloc(uint32_t pages)
 {
-	return __cas_ctx_data_alloc(pages, false);
-}
-
-ctx_data_t *cas_ctx_data_zalloc(uint32_t pages)
-{
-	return __cas_ctx_data_alloc(pages, true);
+	return __cas_ctx_data_alloc(pages);
 }
 
 /*
diff --git a/modules/cas_cache/context.h b/modules/cas_cache/context.h
index 5e9578946..b50233057 100644
--- a/modules/cas_cache/context.h
+++ b/modules/cas_cache/context.h
@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2012-2022 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
@@ -69,7 +70,6 @@ struct blk_data *cas_alloc_blk_data(uint32_t size, gfp_t flags);
 void cas_free_blk_data(struct blk_data *data);
 
 ctx_data_t *cas_ctx_data_alloc(uint32_t pages);
-ctx_data_t *cas_ctx_data_zalloc(uint32_t pages);
 void cas_ctx_data_free(ctx_data_t *ctx_data);
 void cas_ctx_data_secure_erase(ctx_data_t *ctx_data);
 
diff --git a/modules/cas_cache/debug.h b/modules/cas_cache/debug.h
index cc7d2b10e..3dac09ff8 100644
--- a/modules/cas_cache/debug.h
+++ b/modules/cas_cache/debug.h
@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2012-2022 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 #ifndef __CASDISK_DEBUG_H__
@@ -12,7 +13,7 @@
 	printk(KERN_INFO "%s\n", __func__)
 
 #define CAS_DEBUG_DISK_TRACE(dsk)					\
-	printk(KERN_INFO "[%u] %s\n", dsk->id,  __func__)
+	printk(KERN_INFO "[%s] %s\n", dsk->path,  __func__)
 
 #define CAS_DEBUG_MSG(msg)						\
 	printk(KERN_INFO "%s - %s\n", __func__, msg)
@@ -22,8 +23,8 @@
 	       __func__, ##__VA_ARGS__)
 
 #define CAS_DEBUG_DISK(dsk, format, ...)				\
-	printk(KERN_INFO "[%u] %s - "format"\n",			\
-	       dsk->id,							\
+	printk(KERN_INFO "[%s] %s - "format"\n",			\
+	       dsk->path,						\
 	       __func__, ##__VA_ARGS__)
 
 #define CAS_DEBUG_ERROR(error, ...)					\
diff --git a/modules/cas_cache/exp_obj.h b/modules/cas_cache/exp_obj.h
index 1c536578b..be52f5a93 100644
--- a/modules/cas_cache/exp_obj.h
+++ b/modules/cas_cache/exp_obj.h
@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2012-2022 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 #ifndef __CASDISK_EXP_OBJ_H__
@@ -46,9 +47,6 @@ struct cas_exp_obj {
 
 	struct blk_mq_tag_set tag_set;
 
-	atomic_t pt_ios;
-	atomic_t *pending_rqs;
-
 	void *private;
 };
 
diff --git a/modules/cas_cache/layer_cache_management.c b/modules/cas_cache/layer_cache_management.c
index 15ef0e731..1c20f7d28 100644
--- a/modules/cas_cache/layer_cache_management.c
+++ b/modules/cas_cache/layer_cache_management.c
@@ -1075,6 +1075,9 @@ int cache_mngt_core_pool_get_paths(struct kcas_core_pool_path *cmd_info)
 	struct get_paths_ctx visitor_ctx = {0};
 	int result;
 
+	if (visitor_ctx->core_path_name_tab == NULL)
+		return -EINVAL;
+
 	visitor_ctx.core_path_name_tab = cmd_info->core_path_tab;
 	visitor_ctx.max_count = cmd_info->core_pool_count;
 
@@ -2058,6 +2061,7 @@ static int _cache_mngt_start_queues(ocf_cache_t cache)
 			cache_priv->mngt_queue, CAS_CPUS_ALL);
 	if (result) {
 		ocf_queue_put(cache_priv->mngt_queue);
+		cache_priv->mngt_queue = NULL;
 		goto err;
 	}
 
@@ -2697,17 +2701,21 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 	switch (cmd->init_cache) {
 		case CACHE_INIT_STANDBY_NEW:
 		case CACHE_INIT_STANDBY_LOAD:
+			ocf_volume_destroy(attach_cfg->device.volume);
 			printk(KERN_ERR "Standby mode is not supported!\n");
 			return -ENOTSUP;
 		default:
 			break;
 	}
 
-	if (!try_module_get(THIS_MODULE))
+	if (!try_module_get(THIS_MODULE)) {
+		ocf_volume_destroy(attach_cfg->device.volume);
 		return -KCAS_ERR_SYSTEM;
+	}
 
 	result = cache_mngt_check_bdev(&attach_cfg->device, attach_cfg->force, false, NULL);
 	if (result) {
+		ocf_volume_destroy(attach_cfg->device.volume);
 		module_put(THIS_MODULE);
 		return result;
 	}
@@ -2719,6 +2727,7 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 				cache_name_meta, &cache_mode_meta,
 				&cache_line_size_meta);
 		if (result) {
+			ocf_volume_destroy(attach_cfg->device.volume);
 			module_put(THIS_MODULE);
 			return result;
 		}
@@ -2729,6 +2738,7 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 			printk(KERN_ERR "Improper cache name format on %s.\n",
 					cmd->cache_path_name);
 
+			ocf_volume_destroy(attach_cfg->device.volume);
 			module_put(THIS_MODULE);
 			return -OCF_ERR_START_CACHE_FAIL;
 		}
@@ -2741,6 +2751,7 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 					"already exists.\n", cache_name_meta);
 
 			ocf_mngt_cache_put(tmp_cache);
+			ocf_volume_destroy(attach_cfg->device.volume);
 			module_put(THIS_MODULE);
 			return -OCF_ERR_CACHE_EXIST;
 		}
@@ -2755,6 +2766,7 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 
 	context = kzalloc(sizeof(*context), GFP_KERNEL);
 	if (!context) {
+		ocf_volume_destroy(attach_cfg->device.volume);
 		module_put(THIS_MODULE);
 		return -ENOMEM;
 	}
@@ -2764,6 +2776,7 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 	if (IS_ERR(context->rollback_thread)) {
 		result = PTR_ERR(context->rollback_thread);
 		kfree(context);
+		ocf_volume_destroy(attach_cfg->device.volume);
 		module_put(THIS_MODULE);
 		return result;
 	}
@@ -2779,6 +2792,7 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 	if (result) {
 		cas_lazy_thread_stop(context->rollback_thread);
 		kfree(context);
+		ocf_volume_destroy(attach_cfg->device.volume);
 		module_put(THIS_MODULE);
 		return result;
 	}
@@ -2786,12 +2800,12 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 
 	result = _cache_mngt_cache_priv_init(cache);
 	if (result)
-		goto err;
+		goto err_deinit_config;
 	context->priv_inited = true;
 
 	result = _cache_mngt_start_queues(cache);
 	if (result)
-		goto err;
+		goto err_deinit_config;
 
 	cache_priv = ocf_cache_get_priv(cache);
 	cache_priv->attach_context = context;
@@ -2838,6 +2852,9 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
 	ocf_mngt_cache_unlock(cache);
 
 	return result;
+
+err_deinit_config:
+	ocf_volume_destroy(attach_cfg->device.volume);
 err:
 	cmd->min_free_ram = context->min_free_ram;
 
@@ -3196,10 +3213,6 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
 	if (status)
 		return status;
 
-	cache_priv = ocf_cache_get_priv(cache);
-	mngt_queue = cache_priv->mngt_queue;
-	context = cache_priv->stop_context;
-
 	/*
 	 * Flush cache. Flushing may take a long time, so we allow user
 	 * to interrupt this operation. Hence we do first flush before
@@ -3218,6 +3231,10 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
 	if (status)
 		goto put;
 
+	cache_priv = ocf_cache_get_priv(cache);
+	mngt_queue = cache_priv->mngt_queue;
+	context = cache_priv->stop_context;
+
 	context->finish_thread = cas_lazy_thread_create(exit_instance_finish,
 			context, "cas_%s_stop", cache_name);
 	if (IS_ERR(context->finish_thread)) {
@@ -3504,22 +3521,6 @@ int cache_mngt_get_core_info(struct kcas_core_info *info)
 	return result;
 }
 
-static int cache_mngt_wait_for_rq_finish_visitor(ocf_core_t core, void *cntx)
-{
-	ocf_volume_t obj = ocf_core_get_volume(core);
-	struct bd_object *bdobj = bd_object(obj);
-
-	while (atomic64_read(&bdobj->pending_rqs))
-		io_schedule();
-
-	return 0;
-}
-
-void cache_mngt_wait_for_rq_finish(ocf_cache_t cache)
-{
-	ocf_core_visit(cache, cache_mngt_wait_for_rq_finish_visitor, NULL, true);
-}
-
 int cache_mngt_set_core_params(struct kcas_set_core_param *info)
 {
 	ocf_cache_t cache;
diff --git a/modules/cas_cache/service_ui_ioctl.c b/modules/cas_cache/service_ui_ioctl.c
index 0bd8e19ca..6f22d5f63 100644
--- a/modules/cas_cache/service_ui_ioctl.c
+++ b/modules/cas_cache/service_ui_ioctl.c
@@ -32,7 +32,7 @@
 	return map_cas_err_to_generic(ret); \
 })
 
-/* this handles IOctl for /dev/cas */
+/* this handles IOctl for /dev/cas_ctrl */
 /*********************************************/
 long cas_service_ioctl_ctrl(struct file *filp, unsigned int cmd,
 		unsigned long arg)
diff --git a/modules/cas_cache/volume/obj_blk.h b/modules/cas_cache/volume/obj_blk.h
index 281446e6d..870698bfa 100644
--- a/modules/cas_cache/volume/obj_blk.h
+++ b/modules/cas_cache/volume/obj_blk.h
@@ -1,5 +1,6 @@
 /*
 * Copyright(c) 2012-2022 Intel Corporation
+* Copyright(c) 2024 Huawei Technologies
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
@@ -25,12 +26,6 @@ struct bd_object {
 	uint32_t opened_by_bdev : 1;
 		/*!< Opened by supplying bdev manually */
 
-	atomic64_t pending_rqs;
-		/*!< This fields describes in flight IO requests */
-
-	struct workqueue_struct *btm_wq;
-		/*< Workqueue for I/O internally trigerred in bottom vol */
-
 	struct workqueue_struct *expobj_wq;
 		/*< Workqueue for I/O handled by top vol */
 
diff --git a/modules/cas_cache/volume/vol_block_dev_bottom.c b/modules/cas_cache/volume/vol_block_dev_bottom.c
index 31927ba4d..6495e83b2 100644
--- a/modules/cas_cache/volume/vol_block_dev_bottom.c
+++ b/modules/cas_cache/volume/vol_block_dev_bottom.c
@@ -310,6 +310,21 @@ static inline bool cas_bd_io_prepare(int *dir, struct ocf_io *io)
 	return true;
 }
 
+/*
+ * Returns only flags that are relevant to request's direction.
+ */
+static inline uint64_t filter_req_flags(int dir, uint64_t flags)
+{
+	/* Remove REQ_RAHEAD flag from write request to cache which are a
+	   result of a missed read-head request. This flag caused the nvme
+	   driver to send write command with access frequency value that is
+	   reserved */
+	if (dir == WRITE)
+		flags &= ~REQ_RAHEAD;
+
+	return flags;
+}
+
 /*
  *
  */
@@ -359,7 +374,7 @@ static void block_dev_submit_io(struct ocf_io *io)
 		CAS_BIO_BISECTOR(bio) = addr / SECTOR_SIZE;
 		bio->bi_next = NULL;
 		bio->bi_private = io;
-		CAS_BIO_OP_FLAGS(bio) |= io->flags;
+		CAS_BIO_OP_FLAGS(bio) |= filter_req_flags(dir, io->flags);
 		bio->bi_end_io = CAS_REFER_BLOCK_CALLBACK(cas_bd_io_end);
 
 		/* Add pages */
diff --git a/modules/cas_cache/volume/vol_block_dev_top.c b/modules/cas_cache/volume/vol_block_dev_top.c
index 7bb1b176c..9a7c79e86 100644
--- a/modules/cas_cache/volume/vol_block_dev_top.c
+++ b/modules/cas_cache/volume/vol_block_dev_top.c
@@ -370,10 +370,7 @@ static void blkdev_complete_flush(struct ocf_io *io, int error)
 		return;
 	}
 
-	if (in_interrupt())
-		blkdev_defer_bio(bvol, bio, blkdev_handle_bio_noflush);
-	else
-		blkdev_handle_bio_noflush(bvol, bio);
+	blkdev_defer_bio(bvol, bio, blkdev_handle_bio_noflush);
 }
 
 static void blkdev_handle_flush(struct bd_object *bvol, struct bio *bio)
diff --git a/modules/config.mk b/modules/config.mk
index 0ac502e00..17c17961b 100644
--- a/modules/config.mk
+++ b/modules/config.mk
@@ -1,5 +1,6 @@
 #
 # Copyright(c) 2012-2021 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -14,7 +15,7 @@ EXTRA_CFLAGS += -DCAS_VERSION_MAIN=$(CAS_VERSION_MAIN)
 EXTRA_CFLAGS += -DCAS_VERSION_MAJOR=$(CAS_VERSION_MAJOR)
 EXTRA_CFLAGS += -DCAS_VERSION_MINOR=$(CAS_VERSION_MINOR)
 EXTRA_CFLAGS += -DCAS_VERSION=\"$(CAS_VERSION)\"
-EXTRA_CFLAGS += -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security
+EXTRA_CFLAGS += -Ofast -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security
 
 EXTRA_CFLAGS += -I$(M)
 EXTRA_CFLAGS += -I$(M)/cas_cache
diff --git a/tools/cas_version_gen.sh b/tools/cas_version_gen.sh
index aa33fceb0..0badf68dc 100755
--- a/tools/cas_version_gen.sh
+++ b/tools/cas_version_gen.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 #
 # Copyright(c) 2020-2021 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -30,13 +31,19 @@ if [[ -d "$SOURCES_DIR/.git" ]] && which git &>/dev/null &&\
     if [[ ! -r "$MANUAL_VERSION_INPUT" ]]; then
         error "can't read version input file '$MANUAL_VERSION_INPUT'"
     fi
-    . "$MANUAL_VERSION_INPUT"
+    source "$MANUAL_VERSION_INPUT"
     if [[ ! "$CAS_VERSION_MAIN" || ! "$CAS_VERSION_MAJOR" || ! "$CAS_VERSION_MINOR" ]]; then
         error "'$MANUAL_VERSION_INPUT' - wrong version input file format;"\
             "file should contain CAS_VERSION_MAIN, CAS_VERSION_MAJOR and CAS_VERSION_MINOR"\
             "variables along with their respective values"
     fi
 
+    # Make sure version numbers are interpreted by bash as decimal numbers in case any of
+    # them were being input with leading zeros, which is interpreted as an octal by default.
+    CAS_VERSION_MAIN=$((10#$CAS_VERSION_MAIN))
+    CAS_VERSION_MAJOR=$((10#$CAS_VERSION_MAJOR))
+    CAS_VERSION_MINOR=$((10#$CAS_VERSION_MINOR))
+
     CAS_VERSION_BUILD=$(cd "$SOURCES_DIR" && git log --merges --oneline | wc -l)
     LAST_COMMIT_HASH=$(cd "$SOURCES_DIR" && git log -1 --pretty=format:%H)
     LAST_COMMIT_HASH_ABBR=$(cd "$SOURCES_DIR" && git log -1 --pretty=format:%h)
@@ -80,7 +87,7 @@ if [[ -d "$SOURCES_DIR/.git" ]] && which git &>/dev/null &&\
     echo "FILE_CREATION_DATE=$FILE_CREATION_DATE" >> "$VERSION_FILE"
     echo "FILE_CREATION_TIMESTAMP=$FILE_CREATION_TIMESTAMP" >> "$VERSION_FILE"
 elif [[ -r "$VERSION_FILE" ]]; then
-    . "$VERSION_FILE" >/dev/null
+    source "$VERSION_FILE" >/dev/null
     if [[ ! "$CAS_VERSION" ]]; then
         error "'$VERSION_FILE' - wrong version file format; file does not contain CAS_VERSION"
     fi