diff --git a/cmake/modules/Buildpmem.cmake b/cmake/modules/Buildpmem.cmake
index 7068db85e88..6db9754cb95 100644
--- a/cmake/modules/Buildpmem.cmake
+++ b/cmake/modules/Buildpmem.cmake
@@ -9,7 +9,7 @@ function(build_pmem)
     set(source_dir_args
       SOURCE_DIR ${CMAKE_BINARY_DIR}/src/pmdk
       GIT_REPOSITORY https://github.com/ceph/pmdk.git
-      GIT_TAG "1.7"
+      GIT_TAG "1.10"
       GIT_SHALLOW TRUE
       GIT_CONFIG advice.detachedHead=false)
   endif()
diff --git a/make-dist b/make-dist
index e4a78dafd70..91fb4f85375 100755
--- a/make-dist
+++ b/make-dist
@@ -186,8 +186,8 @@ download_boost $boost_version 953db31e016db7bb207f11432bef7df100516eeb746843fa04
 download_liburing 0.7 8e2842cfe947f3a443af301bdd6d034455536c38a455c7a700d0c1ad165a7543 \
                   https://github.com/axboe/liburing/archive \
                   https://git.kernel.dk/cgit/liburing/snapshot
-pmdk_version=1.7
-download_pmdk $pmdk_version 865ce1b422bc83109cb4a63dcff8fd1077eea3617e668faf6a043208d8be03ca \
+pmdk_version=1.10
+download_pmdk $pmdk_version 08dafcf94db5ac13fac9139c92225d9aa5f3724ea74beee4e6ca19a01a2eb20c \
                https://github.com/pmem/pmdk/releases/download/$pmdk_version
 build_dashboard_frontend
 generate_rook_ceph_client
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 72ff9ac9cd1..54d89e29060 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -534,7 +534,7 @@ if(WITH_BLUESTORE_PMEM OR WITH_RBD_RWL)
     if(WITH_RBD_RWL)
       list(APPEND pmem_COMPONENTS pmemobj)
     endif()
-    find_package(pmem 1.7 REQUIRED COMPONENTS ${pmem_COMPONENTS})
+    find_package(pmem 1.10 REQUIRED COMPONENTS ${pmem_COMPONENTS})
   else()
     include(Buildpmem)
     build_pmem()
diff --git a/src/librbd/cache/pwl/rwl/WriteLog.cc b/src/librbd/cache/pwl/rwl/WriteLog.cc
index 4f563d739da..a9b5e708b9e 100644
--- a/src/librbd/cache/pwl/rwl/WriteLog.cc
+++ b/src/librbd/cache/pwl/rwl/WriteLog.cc
@@ -897,6 +897,12 @@ void WriteLog<I>::reserve_cache(C_BlockIORequestT *req,
                                 << *req << dendl;
       alloc_succeeds = false;
       no_space = true; /* Entries need to be retired */
+
+      if (this->m_free_log_entries == this->m_total_log_entries - 1) {
+        /* When the cache is empty, there is still no space to allocate.
+         * Defragment. */
+        pmemobj_defrag(m_log_pool, NULL, 0, NULL);
+      }
       break;
     } else {
       buffer.allocated = true;