Package: systemd Version: 241-7~deb10u2 Severity: important Dear Maintainer,
Listing systemd units takes more than a second on a rather fast system: # time systemctl list-unit-files | wc 351 703 19219 real 0m1.107s user 0m0.000s sys 0m0.013s Adding a filter makes it run twice as long: # time systemctl --state=enabled list-unit-files | wc 63 127 2890 real 0m2.153s user 0m0.010s sys 0m0.002s During this time, the PID 1 (systemd) makes an inordinate number of file access system calls (counts, from the strace output): 1 accept4 1 getsockname 1 sendmsg 2 setsockopt 3 epoll_ctl 3 recvmsg 4 clock_gettime 4 epoll_wait 7 getsockopt 496 read 30535 fstat 33505 close 39334 getdents64 40030 fcntl 45839 openat 98565 readlinkat This is a serious usability problem because of the perceived delay during interactive work. This behaviour is observed on several installations of the up-to-date Debian Buster. This seems to be a regression compared to the Stretch version: # systemctl --version systemd 232 +PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN # time systemctl list-unit-files | wc 252 505 12274 real 0m0.057s user 0m0.000s sys 0m0.004s # time systemctl --state=enabled list-unit-files | wc 36 73 1179 real 0m0.059s user 0m0.000s sys 0m0.000s Looking at some versions in between (234, 237), the regression seems to be cumulative, rather than something that happened in a single commit. Best regards, Dejan *** Reporter, please consider answering these questions, where appropriate *** * What led up to the situation? * What exactly did you do (or not do) that was effective (or ineffective)? * What was the outcome of this action? * What outcome did you expect instead? *** End of the template - remove these template lines *** -- Package-specific info: -- System Information: Debian Release: 10.2 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.19.0-6-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages systemd depends on: ii adduser 3.118 ii libacl1 2.2.53-4 ii libapparmor1 2.13.2-10 ii libaudit1 1:2.8.4-3 ii libblkid1 2.33.1-0.1 ii libc6 2.28-10 ii libcap2 1:2.25-2 ii libcryptsetup12 2:2.1.0-5+deb10u2 ii libgcrypt20 1.8.4-5 ii libgnutls30 3.6.7-4 ii libgpg-error0 1.35-1 ii libidn11 1.33-2.2 ii libip4tc0 1.8.2-4 ii libkmod2 26-1 ii liblz4-1 1.8.3-1 ii liblzma5 5.2.4-1 ii libmount1 2.33.1-0.1 ii libpam0g 1.3.1-5 ii libseccomp2 2.3.3-4 ii libselinux1 2.8-1+b1 ii libsystemd0 241-7~deb10u2 ii mount 2.33.1-0.1 ii util-linux 2.33.1-0.1 Versions of packages systemd recommends: ii dbus 1.12.16-1 ii libpam-systemd 241-7~deb10u2 Versions of packages systemd suggests: ii policykit-1 0.105-25 ii systemd-container 241-7~deb10u2 Versions of packages systemd is related to: pn dracut <none> ii initramfs-tools 0.133+deb10u1 ii udev 241-7~deb10u2 -- no debconf information