> Time to experience with ZRAM :-). I switched over from swap-file to zramswap. And I can definitely say, my last kernel w/o your patchset does not show the symptoms. # cat systemd-analyze-time_5.7.0-rc7-2-amd64-clang_2nd-try.txt Startup finished in 6.129s (kernel) + 44.192s (userspace) = 50.322s graphical.target reached after 44.168s in userspace # cat systemd-analyze-blame_5.7.0-rc7-2-amd64-clang_2nd-try.txt 24.050s udisks2.service 23.711s accounts-daemon.service 18.615s dev-sdc2.device 17.119s polkit.service 16.980s avahi-daemon.service 16.879s NetworkManager.service 16.112s rtkit-daemon.service 15.126s switcheroo-control.service 15.117s wpa_supplicant.service 15.105s systemd-logind.service 14.475s NetworkManager-wait-online.service 14.258s smartmontools.service 13.161s zramswap.service 9.522s rsyslog.service 8.337s gpm.service 6.026s packagekit.service 5.871s ModemManager.service 5.746s networking.service 5.383s e2scrub_reap.service 3.960s systemd-udevd.service 3.396s apparmor.service 3.231s exim4.service 2.795s systemd-journal-flush.service 2.359s alsa-restore.service 2.186s systemd-rfkill.service 1.878s atd.service 1.164s keyboard-setup.service 1.098s bluetooth.service 1.089s systemd-tmpfiles-setup.service 1.021s pppd-dns.service 968ms systemd-backlight@backlight:intel_backlight.service 964ms upower.service 937ms binfmt-support.service 873ms systemd-modules-load.service 849ms systemd-sysusers.service 845ms systemd-journald.service 683ms systemd-timesyncd.service 676ms modprobe@drm.service 641ms systemd-udev-trigger.service 620ms dev-hugepages.mount 618ms dev-mqueue.mount 618ms sys-kernel-debug.mount 617ms sys-kernel-tracing.mount 501ms ifupdown-wait-online.service 434ms systemd-sysctl.service 419ms systemd-random-seed.service 413ms systemd-tmpfiles-setup-dev.service 405ms user@1000.service 389ms systemd-remount-fs.service 383ms console-setup.service 301ms kmod-static-nodes.service 181ms proc-sys-fs-binfmt_misc.mount 174ms systemd-update-utmp.service 85ms systemd-user-sessions.service 22ms user-runtime-dir@1000.service 19ms systemd-update-utmp-runlevel.service 5ms ifupdown-pre.service 4ms sys-fs-fuse-connections.mount [ /etc/zramswap.conf ] ZRAM_SIZE_PERCENT=20 # ZSTD support for ZRAM and ZSWAP requires Linux >= 5.7-rc+. -dileks ZRAM_COMPRESSION_ALGO=zstd [ /etc/fstab ] # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> || <mount point> || <type> || <options> || <dump> || <pass> # # Root-FS (here: /dev/sdc2) UUID=<myUUID> / ext4 errors=remount-ro 0 1 # SWAP (here: /dev/zram0) # Zram-based swap (compressed RAM block devices), for details see zramswap.service and zramswap.conf # dmesg | egrep 'zram|zswap' [ 1.041958] zswap: loaded using pool zstd/zbud [ 29.569355] zram: Added device: zram0 [ 29.581631] zram0: detected capacity change from 0 to 1647824896 [ 30.562279] Adding 1609200k swap on /dev/zram0. Priority:100 extents:1 across:1609200k SSFS # cat /sys/devices/virtual/block/zram0/comp_algorithm lzo lzo-rle lz4 lz4hc [zstd] # swapon --show NAME TYPE SIZE USED PRIO /dev/zram0 partition 1,5G 0B 100 # cat /proc/swaps Filename Type Size Used Priority /dev/zram0 partition 1609200 0 100 If you have any ideas let me know. Ah, I see there is async-buffered.6. - Sedat - [1] https://aur.archlinux.org/packages/zramswap/ [2] https://aur.archlinux.org/cgit/aur.git/tree/zramswap.conf?h=zramswap [3] https://aur.archlinux.org/cgit/aur.git/tree/zramswap.service?h=zramswap