diff --git a/.github/workflows/scripts/qemu-3-deps-vm.sh b/.github/workflows/scripts/qemu-3-deps-vm.sh
index b74303791715..b10bd4da323c 100755
--- a/.github/workflows/scripts/qemu-3-deps-vm.sh
+++ b/.github/workflows/scripts/qemu-3-deps-vm.sh
@@ -1,236 +1,262 @@
 #!/usr/bin/env bash
 
 ######################################################################
 # 3) install dependencies for compiling and loading
 #
 # $1: OS name (like 'fedora41')
+# $2: (optional) Experimental Fedora kernel version, like "6.14" to
+#     install instead of Fedora defaults.
 ######################################################################
 
 set -eu
 
 function archlinux() {
   echo "##[group]Running pacman -Syu"
   sudo btrfs filesystem resize max /
   sudo pacman -Syu --noconfirm
   echo "##[endgroup]"
 
   echo "##[group]Install Development Tools"
   sudo pacman -Sy --noconfirm base-devel bc cpio cryptsetup dhclient dkms \
     fakeroot fio gdb inetutils jq less linux linux-headers lsscsi nfs-utils \
     parted pax perf python-packaging python-setuptools qemu-guest-agent ksh \
     samba sysstat rng-tools rsync wget xxhash
   echo "##[endgroup]"
 }
 
 function debian() {
   export DEBIAN_FRONTEND="noninteractive"
 
   echo "##[group]Running apt-get update+upgrade"
   sudo apt-get update -y
   sudo apt-get upgrade -y
   echo "##[endgroup]"
 
   echo "##[group]Install Development Tools"
   sudo apt-get install -y \
     acl alien attr autoconf bc cpio cryptsetup curl dbench dh-python dkms \
     fakeroot fio gdb gdebi git ksh lcov isc-dhcp-client jq libacl1-dev \
     libaio-dev libattr1-dev libblkid-dev libcurl4-openssl-dev libdevmapper-dev \
     libelf-dev libffi-dev libmount-dev libpam0g-dev libselinux-dev libssl-dev \
     libtool libtool-bin libudev-dev libunwind-dev linux-headers-$(uname -r) \
     lsscsi nfs-kernel-server pamtester parted python3 python3-all-dev \
     python3-cffi python3-dev python3-distlib python3-packaging \
     python3-setuptools python3-sphinx qemu-guest-agent rng-tools rpm2cpio \
     rsync samba sysstat uuid-dev watchdog wget xfslibs-dev  xxhash zlib1g-dev
   echo "##[endgroup]"
 }
 
 function freebsd() {
   export ASSUME_ALWAYS_YES="YES"
 
   echo "##[group]Install Development Tools"
   sudo pkg install -y autoconf automake autotools base64 checkbashisms fio \
     gdb gettext gettext-runtime git gmake gsed jq ksh93 lcov libtool lscpu \
     pkgconf python python3 pamtester pamtester qemu-guest-agent rsync xxhash
   sudo pkg install -xy \
     '^samba4[[:digit:]]+$' \
     '^py3[[:digit:]]+-cffi$' \
     '^py3[[:digit:]]+-sysctl$' \
     '^py3[[:digit:]]+-setuptools$' \
     '^py3[[:digit:]]+-packaging$'
   echo "##[endgroup]"
 }
 
 # common packages for: almalinux, centos, redhat
 function rhel() {
   echo "##[group]Running dnf update"
   echo "max_parallel_downloads=10" | sudo -E tee -a /etc/dnf/dnf.conf
   sudo dnf clean all
   sudo dnf update -y --setopt=fastestmirror=1 --refresh
   echo "##[endgroup]"
 
   echo "##[group]Install Development Tools"
 
   # Alma wants "Development Tools", Fedora 41 wants "development-tools"
   if ! sudo dnf group install -y "Development Tools" ; then
     echo "Trying 'development-tools' instead of 'Development Tools'"
     sudo dnf group install -y development-tools
   fi
 
   sudo dnf install -y \
     acl attr bc bzip2 cryptsetup curl dbench dkms elfutils-libelf-devel fio \
     gdb git jq kernel-rpm-macros ksh libacl-devel libaio-devel \
     libargon2-devel libattr-devel libblkid-devel libcurl-devel libffi-devel \
     ncompress libselinux-devel libtirpc-devel libtool libudev-devel \
     libuuid-devel lsscsi mdadm nfs-utils openssl-devel pam-devel pamtester \
     parted perf python3 python3-cffi python3-devel python3-packaging \
     kernel-devel python3-setuptools qemu-guest-agent rng-tools rpcgen \
     rpm-build rsync samba sysstat systemd watchdog wget xfsprogs-devel xxhash \
     zlib-devel
   echo "##[endgroup]"
 }
 
 function tumbleweed() {
   echo "##[group]Running zypper is TODO!"
   sleep 23456
   echo "##[endgroup]"
 }
 
+# $1: Kernel version to install (like '6.14rc7')
+function install_fedora_experimental_kernel {
+
+  our_version="$1"
+  sudo dnf -y copr enable @kernel-vanilla/stable
+  sudo dnf -y copr enable @kernel-vanilla/mainline
+  all="$(sudo dnf list --showduplicates kernel-*)"
+  echo "Available versions:"
+  echo "$all"
+
+  # You can have a bunch of minor variants of the version we want '6.14'.
+  # Pick the newest variant (sorted by version number).
+  specific_version=$(echo "$all" | grep $our_version | awk '{print $2}' | sort -V | tail -n 1)
+  list="$(echo "$all" | grep $specific_version | grep -Ev 'kernel-rt|kernel-selftests|kernel-debuginfo' | sed 's/.x86_64//g' | awk '{print $1"-"$2}')"
+  sudo dnf install -y $list
+  sudo dnf -y copr disable @kernel-vanilla/stable
+  sudo dnf -y copr disable @kernel-vanilla/mainline
+}
+
 # Install dependencies
 case "$1" in
   almalinux8)
     echo "##[group]Enable epel and powertools repositories"
     sudo dnf config-manager -y --set-enabled powertools
     sudo dnf install -y epel-release
     echo "##[endgroup]"
     rhel
     echo "##[group]Install kernel-abi-whitelists"
     sudo dnf install -y kernel-abi-whitelists
     echo "##[endgroup]"
     ;;
   almalinux9|centos-stream9|centos-stream10)
     echo "##[group]Enable epel and crb repositories"
     sudo dnf config-manager -y --set-enabled crb
     sudo dnf install -y epel-release
     echo "##[endgroup]"
     rhel
     echo "##[group]Install kernel-abi-stablelists"
     sudo dnf install -y kernel-abi-stablelists
     echo "##[endgroup]"
     ;;
   archlinux)
     archlinux
     ;;
   debian*)
     echo 'debconf debconf/frontend select Noninteractive' | sudo debconf-set-selections
     debian
     echo "##[group]Install Debian specific"
     sudo apt-get install -yq linux-perf dh-sequence-dkms
     echo "##[endgroup]"
     ;;
   fedora*)
     rhel
     sudo dnf install -y libunwind-devel
 
     # Fedora 42+ moves /usr/bin/script from 'util-linux' to 'util-linux-script'
     sudo dnf install -y util-linux-script || true
+
+    # Optional: Install an experimental kernel ($2 = kernel version)
+    if [ -n "${2:-}" ] ; then
+      install_fedora_experimental_kernel "$2"
+    fi
     ;;
   freebsd*)
     freebsd
     ;;
   tumbleweed)
     tumbleweed
     ;;
   ubuntu*)
     debian
     echo "##[group]Install Ubuntu specific"
     sudo apt-get install -yq linux-tools-common libtirpc-dev \
       linux-modules-extra-$(uname -r)
     if [ "$1" != "ubuntu20" ]; then
       sudo apt-get install -yq dh-sequence-dkms
     fi
     echo "##[endgroup]"
     echo "##[group]Delete Ubuntu OpenZFS modules"
     for i in $(find /lib/modules -name zfs -type d); do sudo rm -rvf $i; done
     echo "##[endgroup]"
     ;;
 esac
 
 # This script is used for checkstyle + zloop deps also.
 # Install only the needed packages and exit - when used this way.
 test -z "${ONLY_DEPS:-}" || exit 0
 
 # Start services
 echo "##[group]Enable services"
 case "$1" in
   freebsd*)
     # add virtio things
     echo 'virtio_load="YES"' | sudo -E tee -a /boot/loader.conf
     for i in balloon blk console random scsi; do
       echo "virtio_${i}_load=\"YES\"" | sudo -E tee -a /boot/loader.conf
     done
     echo "fdescfs /dev/fd fdescfs rw 0 0" | sudo -E tee -a /etc/fstab
     sudo -E mount /dev/fd
     sudo -E touch /etc/zfs/exports
     sudo -E sysrc mountd_flags="/etc/zfs/exports"
     echo '[global]' | sudo -E tee /usr/local/etc/smb4.conf >/dev/null
     sudo -E service nfsd enable
     sudo -E service qemu-guest-agent enable
     sudo -E service samba_server enable
     ;;
   debian*|ubuntu*)
     sudo -E systemctl enable nfs-kernel-server
     sudo -E systemctl enable qemu-guest-agent
     sudo -E systemctl enable smbd
     ;;
   *)
     # All other linux distros
     sudo -E systemctl enable nfs-server
     sudo -E systemctl enable qemu-guest-agent
     sudo -E systemctl enable smb
     ;;
 esac
 echo "##[endgroup]"
 
 # Setup Kernel cmdline
 CMDLINE="console=tty0 console=ttyS0,115200n8"
 CMDLINE="$CMDLINE selinux=0"
 CMDLINE="$CMDLINE random.trust_cpu=on"
 CMDLINE="$CMDLINE no_timer_check"
 case "$1" in
   almalinux*|centos*|fedora*)
     GRUB_CFG="/boot/grub2/grub.cfg"
     GRUB_MKCONFIG="grub2-mkconfig"
     CMDLINE="$CMDLINE biosdevname=0 net.ifnames=0"
     echo 'GRUB_SERIAL_COMMAND="serial --speed=115200"' \
       | sudo tee -a /etc/default/grub >/dev/null
     ;;
   ubuntu24)
     GRUB_CFG="/boot/grub/grub.cfg"
     GRUB_MKCONFIG="grub-mkconfig"
     echo 'GRUB_DISABLE_OS_PROBER="false"' \
       | sudo tee -a /etc/default/grub >/dev/null
     ;;
   *)
     GRUB_CFG="/boot/grub/grub.cfg"
     GRUB_MKCONFIG="grub-mkconfig"
     ;;
 esac
 
 case "$1" in
   archlinux|freebsd*)
     true
     ;;
   *)
     echo "##[group]Edit kernel cmdline"
     sudo sed -i -e '/^GRUB_CMDLINE_LINUX/d' /etc/default/grub || true
     echo "GRUB_CMDLINE_LINUX=\"$CMDLINE\"" \
       | sudo tee -a /etc/default/grub >/dev/null
     sudo $GRUB_MKCONFIG -o $GRUB_CFG
     echo "##[endgroup]"
     ;;
 esac
 
 # reset cloud-init configuration and poweroff
 sudo cloud-init clean --logs
 sleep 2 && sudo poweroff &
 exit 0
diff --git a/.github/workflows/scripts/qemu-3-deps.sh b/.github/workflows/scripts/qemu-3-deps.sh
index 184aed85b4e5..267ae4ad3c7b 100755
--- a/.github/workflows/scripts/qemu-3-deps.sh
+++ b/.github/workflows/scripts/qemu-3-deps.sh
@@ -1,15 +1,28 @@
 ######################################################################
 # 3) Wait for VM to boot from previous step and launch dependencies
 #    script on it.
 #
 # $1: OS name (like 'fedora41')
+# $2: (optional) Experimental kernel version to install on fedora,
+#     like "6.14".
 ######################################################################
 
 .github/workflows/scripts/qemu-wait-for-vm.sh vm0
+
+# SPECIAL CASE:
+#
+# If the user passed in an experimental kernel version to test on Fedora,
+# we need to update the kernel version in zfs's META file to allow the
+# build to happen.  We update our local copy of META here, since we know
+# it will be rsync'd up in the next step.
+if [ -n "${2:-}" ] ; then
+  sed -i -E 's/Linux-Maximum: .+/Linux-Maximum: 99.99/g' META
+fi
+
 scp .github/workflows/scripts/qemu-3-deps-vm.sh zfs@vm0:qemu-3-deps-vm.sh
 PID=`pidof /usr/bin/qemu-system-x86_64`
-ssh zfs@vm0 '$HOME/qemu-3-deps-vm.sh' $1
+ssh zfs@vm0 '$HOME/qemu-3-deps-vm.sh' "$@"
 # wait for poweroff to succeed
 tail --pid=$PID -f /dev/null
 sleep 5 # avoid this: "error: Domain is already active"
 rm -f $HOME/.ssh/known_hosts
diff --git a/.github/workflows/zfs-qemu.yml b/.github/workflows/zfs-qemu.yml
index d4578e40ad90..eb4616220092 100644
--- a/.github/workflows/zfs-qemu.yml
+++ b/.github/workflows/zfs-qemu.yml
@@ -1,180 +1,193 @@
 name: zfs-qemu
 
 on:
   push:
   pull_request:
   workflow_dispatch:
     inputs:
       include_stream9:
         type: boolean
         required: false
         default: false
         description: 'Test on CentOS 9 stream'
       include_stream10:
         type: boolean
         required: false
         default: false
         description: 'Test on CentOS 10 stream'
+      fedora_kernel_ver:
+        type: string
+        required: false
+        default: ""
+        description: "(optional) Experimental kernel version to install on Fedora (like '6.14' or '6.13.3-0.rc3')"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
 jobs:
   test-config:
     name: Setup
     runs-on: ubuntu-24.04
     outputs:
       test_os: ${{ steps.os.outputs.os }}
       ci_type: ${{ steps.os.outputs.ci_type }}
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Generate OS config and CI type
         id: os
         run: |
           FULL_OS='["almalinux8", "almalinux9", "debian11", "debian12", "fedora40", "fedora41", "fedora42", "freebsd13-4r", "freebsd14-2s", "freebsd15-0c", "ubuntu20", "ubuntu22", "ubuntu24"]'
           QUICK_OS='["almalinux8", "almalinux9", "debian12", "fedora42", "freebsd14-2r", "ubuntu24"]'
           # determine CI type when running on PR
           ci_type="full"
           if ${{ github.event_name == 'pull_request' }}; then
             head=${{ github.event.pull_request.head.sha }}
             base=${{ github.event.pull_request.base.sha }}
             ci_type=$(python3 .github/workflows/scripts/generate-ci-type.py $head $base)
           fi
           if [ "$ci_type" == "quick" ]; then
             os_selection="$QUICK_OS"
           else
             os_selection="$FULL_OS"
           fi
-          os_json=$(echo ${os_selection} | jq -c)
+
+          if [ ${{ github.event.inputs.fedora_kernel_ver }} != "" ] ; then
+              # They specified a custom kernel version for Fedora.  Use only
+              # Fedora runners.
+              os_json=$(echo ${os_selection} | jq -c '[.[] | select(startswith("fedora"))]')
+          else
+              # Normal case
+              os_json=$(echo ${os_selection} | jq -c)
+          fi
 
           # Add optional runners
           if [ "${{ github.event.inputs.include_stream9 }}" == 'true' ]; then
             os_json=$(echo $os_json | jq -c '. += ["centos-stream9"]')
           fi
           if [ "${{ github.event.inputs.include_stream10 }}" == 'true' ]; then
             os_json=$(echo $os_json | jq -c '. += ["centos-stream10"]')
           fi
 
           echo $os_json
           echo "os=$os_json" >> $GITHUB_OUTPUT
           echo "ci_type=$ci_type" >> $GITHUB_OUTPUT
 
   qemu-vm:
     name: qemu-x86
     needs: [ test-config ]
     strategy:
       fail-fast: false
       matrix:
         # rhl:     almalinux8, almalinux9, centos-stream9, fedora40, fedora41
         # debian:  debian11, debian12, ubuntu20, ubuntu22, ubuntu24
         # misc:    archlinux, tumbleweed
         # FreeBSD variants of 2024-12:
         # FreeBSD Release: freebsd13-4r, freebsd14-2r
         # FreeBSD Stable:  freebsd13-4s, freebsd14-2s
         # FreeBSD Current: freebsd15-0c
         os: ${{ fromJson(needs.test-config.outputs.test_os) }}
     runs-on: ubuntu-24.04
     steps:
     - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
 
     - name: Setup QEMU
       timeout-minutes: 10
       run: .github/workflows/scripts/qemu-1-setup.sh
 
     - name: Start build machine
       timeout-minutes: 10
       run: .github/workflows/scripts/qemu-2-start.sh ${{ matrix.os }}
 
     - name: Install dependencies
       timeout-minutes: 20
-      run: .github/workflows/scripts/qemu-3-deps.sh ${{ matrix.os }}
+      run: .github/workflows/scripts/qemu-3-deps.sh ${{ matrix.os }} ${{ github.event.inputs.fedora_kernel_ver }}
 
     - name: Build modules
       timeout-minutes: 30
       run: .github/workflows/scripts/qemu-4-build.sh --poweroff --enable-debug ${{ matrix.os }}
 
     - name: Setup testing machines
       timeout-minutes: 5
       run: .github/workflows/scripts/qemu-5-setup.sh
 
     - name: Run tests
       timeout-minutes: 270
       run: .github/workflows/scripts/qemu-6-tests.sh
       env:
         CI_TYPE: ${{ needs.test-config.outputs.ci_type }}
 
     - name: Prepare artifacts
       if: always()
       timeout-minutes: 10
       run: .github/workflows/scripts/qemu-7-prepare.sh
 
     - uses: actions/upload-artifact@v4
       id: artifact-upload
       if: always()
       with:
         name: Logs-functional-${{ matrix.os }}
         path: /tmp/qemu-${{ matrix.os }}.tar
         if-no-files-found: ignore
 
     - name: Test Summary
       if: always()
       run: .github/workflows/scripts/qemu-8-summary.sh '${{ steps.artifact-upload.outputs.artifact-url }}'
 
   cleanup:
     if: always()
     name: Cleanup
     runs-on: ubuntu-latest
     needs: [ qemu-vm ]
 
     steps:
     - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
     - uses: actions/download-artifact@v4
     - name: Generating summary
       run: .github/workflows/scripts/qemu-9-summary-page.sh
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 2
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 3
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 4
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 5
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 6
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 7
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 8
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 9
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 10
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 11
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 12
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 13
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 14
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 15
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 16
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 17
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 18
     - name: Generating summary...
       run: .github/workflows/scripts/qemu-9-summary-page.sh 19
     - uses: actions/upload-artifact@v4
       with:
         name: Summary Files
         path: out-*