diff --git a/README.md b/README.md
index f7748350f..595c9cea7 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,7 @@ for more details, see [nginx guide](https://github.com/F-Stack/f-stack/blob/mast
 
     cd app/redis-6.2.6/deps/jemalloc
     ./autogen.sh 
-    cd app/redis-6.2.6/
+    cd ../..
     make
     make install
 
diff --git a/VERSION b/VERSION
new file mode 100644
index 000000000..a1b6e17d6
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+1.23
diff --git a/app/nginx-1.16.1/src/event/modules/ngx_ff_module.c b/app/nginx-1.16.1/src/event/modules/ngx_ff_module.c
index c74afff68..4ddd79e95 100644
--- a/app/nginx-1.16.1/src/event/modules/ngx_ff_module.c
+++ b/app/nginx-1.16.1/src/event/modules/ngx_ff_module.c
@@ -545,6 +545,11 @@ kevent(int kq, const struct kevent *changelist, int nchanges,
     return ff_kevent(kq, changelist, nchanges, eventlist, nevents, timeout);
 }
 
+/*
+ * It is need to modify the definition, such as Ubuntu 22.04 or later.
+ *
+ * int(struct timeval * restrict,  void * restrict)
+ */
 int
 gettimeofday(struct timeval *tv, struct timezone *tz)
 {
diff --git a/app/redis-6.2.6/src/anet_ff.c b/app/redis-6.2.6/src/anet_ff.c
index b9e5172a1..d7fd6fdba 100644
--- a/app/redis-6.2.6/src/anet_ff.c
+++ b/app/redis-6.2.6/src/anet_ff.c
@@ -160,7 +160,7 @@ socket(int domain, int type, int protocol)
         return real_socket(domain, type, protocol);
     }
 
-    if ((AF_INET != domain) || (SOCK_STREAM != type && SOCK_DGRAM != type)) {
+    if ((AF_INET != domain && AF_INET6 != domain) || (SOCK_STREAM != type && SOCK_DGRAM != type)) {
         rc = real_socket(domain, type, protocol);
         return rc;
     }
diff --git a/config.ini b/config.ini
index e374262c4..dcdc5adce 100644
--- a/config.ini
+++ b/config.ini
@@ -40,9 +40,9 @@ symmetric_rss=0
 
 # PCI device enable list.
 # And driver options
-#pci_whitelist=02:00.0
+#allow=02:00.0
 # for multiple PCI devices
-#pci_whitelist=02:00.0,03:00.0
+#allow=02:00.0,03:00.0
 
 # enabled port list
 #
@@ -161,7 +161,7 @@ gateway=192.168.1.1
 # FreeBSD network performance tuning configurations.
 # Most native FreeBSD configurations are supported.
 [freebsd.boot]
-# If use rack/bbr which depend HPTS, you should set a greater value of hz, such as 100000 means a tick is 10us.
+# If use rack/bbr which depend HPTS, you should set a greater value of hz, such as 1000000 means a tick is 1us.
 hz=100
 
 # Block out a range of descriptors to avoid overlap
@@ -179,10 +179,6 @@ net.inet.tcp.tcbhashsize=65536
 kern.ncallout=262144
 
 kern.features.inet6=1
-net.inet6.ip6.auto_linklocal=1
-net.inet6.ip6.accept_rtadv=2
-net.inet6.icmp6.rediraccept=1
-net.inet6.ip6.forwarding=0
 
 [freebsd.sysctl]
 kern.ipc.somaxconn=32768
@@ -211,7 +207,16 @@ net.inet.udp.blackhole=1
 net.inet.ip.redirect=0
 net.inet.ip.forwarding=0
 
+net.inet6.ip6.auto_linklocal=1
+net.inet6.ip6.accept_rtadv=2
+net.inet6.icmp6.rediraccept=1
+net.inet6.ip6.forwarding=0
+
 # set default stacks:freebsd, rack or bbr, may be you need increase the value of parameter 'freebsd.boot.hz' while use rack or bbr.
 net.inet.tcp.functions_default=freebsd
 # need by bbr, should enable it.
 net.inet.tcp.hpts.skip_swi=1
+# Interval between calls to hpts_timeout_dir. default min 250us, max 256-512ms, default 512ms.
+net.inet.tcp.hpts.minsleep=250
+# [25600-51200]
+net.inet.tcp.hpts.maxsleep=51200
diff --git a/doc/F-Stack_Quick_Start_Guide.md b/doc/F-Stack_Quick_Start_Guide.md
index fd2e2b43b..392f0d972 100644
--- a/doc/F-Stack_Quick_Start_Guide.md
+++ b/doc/F-Stack_Quick_Start_Guide.md
@@ -88,7 +88,7 @@ The mount point can be made permanent across reboots, by adding the following li
 
 	cd app/redis-6.2.6/deps/jemalloc
 	./autogen.sh
-	cd app/redis-6.2.6/
+	cd ../..
 	make
 	# run with start.sh
 	./start.sh -b ./redis-server -o /path/to/redis.conf
diff --git a/example/main.c b/example/main.c
index 78ba53b37..a27b06e57 100644
--- a/example/main.c
+++ b/example/main.c
@@ -8,6 +8,7 @@
 #include <arpa/inet.h>
 #include <errno.h>
 #include <assert.h>
+#include <sys/ioctl.h>
 
 #include "ff_config.h"
 #include "ff_api.h"
@@ -25,7 +26,7 @@ int sockfd;
 int sockfd6;
 #endif
 
-char html[] = 
+char html[] =
 "HTTP/1.1 200 OK\r\n"
 "Server: F-Stack\r\n"
 "Date: Sat, 25 Feb 2017 09:26:33 GMT\r\n"
@@ -60,8 +61,14 @@ char html[] =
 int loop(void *arg)
 {
     /* Wait for events to happen */
-    unsigned nevents = ff_kevent(kq, NULL, 0, events, MAX_EVENTS, NULL);
-    unsigned i;
+    int nevents = ff_kevent(kq, NULL, 0, events, MAX_EVENTS, NULL);
+    int i;
+
+    if (nevents < 0) {
+        printf("ff_kevent failed:%d, %s\n", errno,
+                        strerror(errno));
+        return -1;
+    }
 
     for (i = 0; i < nevents; ++i) {
         struct kevent event = events[i];
@@ -98,20 +105,30 @@ int loop(void *arg)
             } while (available);
         } else if (event.filter == EVFILT_READ) {
             char buf[256];
-            size_t readlen = ff_read(clientfd, buf, sizeof(buf));
-
-            ff_write(clientfd, html, sizeof(html) - 1);
+            ssize_t readlen = ff_read(clientfd, buf, sizeof(buf));
+            ssize_t writelen = ff_write(clientfd, html, sizeof(html) - 1);
+            if (writelen < 0){
+                printf("ff_write failed:%d, %s\n", errno,
+                    strerror(errno));
+                ff_close(clientfd);
+            }
         } else {
             printf("unknown event: %8.8X\n", event.flags);
         }
     }
+
+    return 0;
 }
 
 int main(int argc, char * argv[])
 {
     ff_init(argc, argv);
 
-    assert((kq = ff_kqueue()) > 0);
+    kq = ff_kqueue();
+    if (kq < 0) {
+        printf("ff_kqueue failed, errno:%d, %s\n", errno, strerror(errno));
+        exit(1);
+    }
 
     sockfd = ff_socket(AF_INET, SOCK_STREAM, 0);
     if (sockfd < 0) {
@@ -119,6 +136,10 @@ int main(int argc, char * argv[])
         exit(1);
     }
 
+    /* Set non blocking */
+    int on = 1;
+    ff_ioctl(sockfd, FIONBIO, &on);
+
     struct sockaddr_in my_addr;
     bzero(&my_addr, sizeof(my_addr));
     my_addr.sin_family = AF_INET;
@@ -167,7 +188,11 @@ int main(int argc, char * argv[])
     }
 
     EV_SET(&kevSet, sockfd6, EVFILT_READ, EV_ADD, 0, MAX_EVENTS, NULL);
-    ff_kevent(kq, &kevSet, 1, NULL, 0, NULL);
+    ret = ff_kevent(kq, &kevSet, 1, NULL, 0, NULL);
+    if (ret < 0) {
+        printf("ff_kevent failed:%d, %s\n", errno, strerror(errno));
+        exit(1);
+    }
 #endif
 
     ff_run(loop, NULL);
diff --git a/example/main_zc.c b/example/main_zc.c
index 30dc422b3..1c7b413dd 100644
--- a/example/main_zc.c
+++ b/example/main_zc.c
@@ -25,7 +25,7 @@ int sockfd;
 int sockfd6;
 #endif
 
-char html[] = 
+char html[] =
 "HTTP/1.1 200 OK\r\n"
 "Server: F-Stack\r\n"
 "Date: Sat, 25 Feb 2017 09:26:33 GMT\r\n"
@@ -58,7 +58,7 @@ char html[] =
 "</html>";
 
 
-char html1[] = 
+char html1[] =
 "HTTP/1.1 200 OK\r\n"
 "Server: F-Stack\r\n"
 "Date: Sat, 25 Feb 2017 09:26:33 GMT\r\n"
@@ -94,7 +94,7 @@ char html1[] =
 "</body>\r\n"
 "</html>";
 
-char html2[] = 
+char html2[] =
 "HTTP/1.1 200 OK\r\n"
 "Server: F-Stack\r\n"
 "Date: Sat, 25 Feb 2017 09:26:33 GMT\r\n"
@@ -195,7 +195,7 @@ int loop(void *arg)
                      printf("ff_zc_mbuf_write failed, len:%d, errno:%d, %s\n", to_write_len, errno, strerror(errno));
                      exit(1);
                  }
-             off += to_write_len;
+                off += to_write_len;
             }
 
             /* Or call ff_zc_mbuf_write one time */
diff --git a/freebsd/kern/kern_linker.c b/freebsd/kern/kern_linker.c
index e54546eec..2fb07a4f6 100644
--- a/freebsd/kern/kern_linker.c
+++ b/freebsd/kern/kern_linker.c
@@ -771,7 +771,7 @@ linker_file_add_dependency(linker_file_t file, linker_file_t dep)
 	file->deps[file->ndeps] = dep;
 	file->ndeps++;
 	KLD_DPF(FILE, ("linker_file_add_dependency:"
-	    " adding %s as dependency for %s\n", 
+	    " adding %s as dependency for %s\n",
 	    dep->filename, file->filename));
 	return (0);
 }
@@ -1862,7 +1862,11 @@ linker_hints_lookup(const char *path, int pathlen, const char *modname,
 		goto bad;
 	best = cp = NULL;
 	error = VOP_GETATTR(nd.ni_vp, &vattr, cred);
+#ifdef FSTACK
+	if (error || vattr.va_size == 0)
+#else
 	if (error)
+#endif
 		goto bad;
 	/*
 	 * XXX: we need to limit this number to some reasonable value
diff --git a/freebsd/netinet/in_mcast.c b/freebsd/netinet/in_mcast.c
index 6d390a0b2..97214d6d7 100644
--- a/freebsd/netinet/in_mcast.c
+++ b/freebsd/netinet/in_mcast.c
@@ -760,7 +760,11 @@ imf_get_source(struct in_mfilter *imf, const struct sockaddr_in *psin,
 	if (lims == NULL) {
 		if (imf->imf_nsrc == in_mcast_maxsocksrc)
 			return (ENOSPC);
+#ifdef FSTACK
+		nims = malloc(sizeof(struct ip_msource), M_INMFILTER,
+#else
 		nims = malloc(sizeof(struct in_msource), M_INMFILTER,
+#endif
 		    M_NOWAIT | M_ZERO);
 		if (nims == NULL)
 			return (ENOMEM);
@@ -791,7 +795,11 @@ imf_graft(struct in_mfilter *imf, const uint8_t st1,
 	struct ip_msource	*nims;
 	struct in_msource	*lims;
 
+#ifdef FSTACK
+	nims = malloc(sizeof(struct ip_msource), M_INMFILTER,
+#else
 	nims = malloc(sizeof(struct in_msource), M_INMFILTER,
+#endif
 	    M_NOWAIT | M_ZERO);
 	if (nims == NULL)
 		return (NULL);
diff --git a/freebsd/netinet6/in6_mcast.c b/freebsd/netinet6/in6_mcast.c
index 9b04c87d2..75dba103f 100644
--- a/freebsd/netinet6/in6_mcast.c
+++ b/freebsd/netinet6/in6_mcast.c
@@ -729,7 +729,11 @@ im6f_get_source(struct in6_mfilter *imf, const struct sockaddr_in6 *psin,
 	if (lims == NULL) {
 		if (imf->im6f_nsrc == in6_mcast_maxsocksrc)
 			return (ENOSPC);
+#ifdef FSTACK
+		nims = malloc(sizeof(struct ip6_msource), M_IN6MFILTER,
+#else
 		nims = malloc(sizeof(struct in6_msource), M_IN6MFILTER,
+#endif
 		    M_NOWAIT | M_ZERO);
 		if (nims == NULL)
 			return (ENOMEM);
@@ -760,7 +764,11 @@ im6f_graft(struct in6_mfilter *imf, const uint8_t st1,
 	struct ip6_msource	*nims;
 	struct in6_msource	*lims;
 
+#ifdef FSTACK
+	nims = malloc(sizeof(struct ip6_msource), M_IN6MFILTER,
+#else
 	nims = malloc(sizeof(struct in6_msource), M_IN6MFILTER,
+#endif
 	    M_NOWAIT | M_ZERO);
 	if (nims == NULL)
 		return (NULL);
diff --git a/lib/Makefile b/lib/Makefile
index 3939db144..f204cd657 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -20,7 +20,7 @@ PREFIX_LIB=${PREFIX}/lib
 PREFIX_INCLUDE=/usr/local/include
 PREFIX_BIN=/usr/local/bin
 F-STACK_CONF=/etc/f-stack.conf
-F-STACK_VERSION=1.22
+F-STACK_VERSION=1.23
 TGT_OS=$(shell uname)
 ifeq ($(TGT_OS),FreeBSD)
 CC=gcc
diff --git a/lib/ff_api.h b/lib/ff_api.h
index 4e430011e..3cb57de86 100644
--- a/lib/ff_api.h
+++ b/lib/ff_api.h
@@ -64,6 +64,15 @@ int ff_sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp,
 
 int ff_ioctl(int fd, unsigned long request, ...);
 
+/*
+ * While get sockfd from this API, and then need set it to non-blocking mode like this,
+ * Otherwise, sometimes the socket interface will not work properly, such as `ff_write()`
+ *
+ *    int on = 1;
+ *    ff_ioctl(sockfd, FIONBIO, &on);
+ *
+ *  See also `example/main.c`
+ */
 int ff_socket(int domain, int type, int protocol);
 
 int ff_setsockopt(int s, int level, int optname, const void *optval,
@@ -87,6 +96,21 @@ int ff_getsockname(int s, struct linux_sockaddr *name,
 ssize_t ff_read(int d, void *buf, size_t nbytes);
 ssize_t ff_readv(int fd, const struct iovec *iov, int iovcnt);
 
+
+/*
+ * Write data to the socket sendspace buf.
+ *
+ * Note:
+ * The `fd` parameter need set non-blocking mode in advance if F-Stack's APP.
+ * Otherwise if the `nbytes` parameter is greater than
+ * `net.inet.tcp.sendspace + net.inet.tcp.sendbuf_inc`,
+ * the API will return -1, but not the length that has been sent.
+ *
+ * You also can modify the value of  `net.inet.tcp.sendspace`(default 16384 bytes)
+ * and `net.inet.tcp.sendbuf_inc`(default 16384 bytes) with `config.ini`.
+ * But it should be noted that not all parameters can take effect, such as 32768 and 32768.
+ * `ff_sysctl` can see there values while APP is running.
+ */
 ssize_t ff_write(int fd, const void *buf, size_t nbytes);
 ssize_t ff_writev(int fd, const struct iovec *iov, int iovcnt);
 
diff --git a/lib/ff_config.c b/lib/ff_config.c
index 79d88faad..fdff3f1ff 100644
--- a/lib/ff_config.c
+++ b/lib/ff_config.c
@@ -783,7 +783,7 @@ dpdk_args_setup(struct ff_config *cfg)
         char* rest = cfg->dpdk.pci_whitelist;
 
         while ((token = strtok_r(rest, ",", &rest))){
-            sprintf(temp, "--pci-whitelist=%s", token);
+            sprintf(temp, "--allow=%s", token);
             dpdk_argv[n++] = strdup(temp);
         }
 
diff --git a/lib/include/vm/uma_int.h b/lib/include/vm/uma_int.h
index a85d0ef74..2805f96b0 100644
--- a/lib/include/vm/uma_int.h
+++ b/lib/include/vm/uma_int.h
@@ -76,7 +76,7 @@ vtoslab(vm_offset_t va)
 
     hash_list = &uma_page_slab_hash[UMA_PAGE_HASH(va)];
     LIST_FOREACH(up, hash_list, list_entry)
-        if (up->up_va == va)
+        if (up->up_va == (va & (~(PAGE_SIZE - 1))))
             return (up->up_slab);
     return (NULL);
 }
@@ -89,7 +89,7 @@ vtozoneslab(vm_offset_t va, uma_zone_t *zone, uma_slab_t *slab)
 
     hash_list = &uma_page_slab_hash[UMA_PAGE_HASH(va)];
     LIST_FOREACH(up, hash_list, list_entry)
-        if (up->up_va == va)
+        if (up->up_va == (va & (~(PAGE_SIZE - 1))))
             break;
 
     *slab = up->up_slab;