> ... from systemd 237-3ubuntu10.53 to 237-3ubuntu10.56 > and are experiencing some performance issues. > A kernel upgrade also happened (4.15.0.192.177 -> 4.15.0.193.178)
> but I thought I'd check here first. > Sorry if I'm raising this in the wrong place! Thanks for the bug report! No worries; this is totally fine -- one can redirect to another package/project if appropriate. > Unfortunately I'm unsure how to investigate this further. I'd suggest to reboot/revert one upgrade at a time, to verify which of kernel/systemd are associated with this, if any; eg: First reboot to the old kernel (4.15.0-192), and check if the issue persists. If it doesn't, then we should look at the kernel. If it does, downgrade systemd (you can find the .debs for 10.53 here [1], and download/reinstall as needed, e.g., `dpkg -l | grep 237-3ubuntu10.56`) If the issue doesn't persist, we should look at systemd. If it does, then it's neither kernel/systemd, and might be something else. Hope this helps! [1] https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.53/+build/22621099 ** Changed in: systemd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1991235 Title: systemd 237-3ubuntu10.56 times out on getpwuid Status in systemd package in Ubuntu: Incomplete Bug description: We've recently upgraded packages on one of our images from systemd 237-3ubuntu10.53 to 237-3ubuntu10.56 and are experiencing some performance issues. A kernel upgrade also happened (4.15.0.192.177 -> 4.15.0.193.178) but I thought I'd check here first. Sorry if I'm raising this in the wrong place! Various operations are very slow: * logging in via SSH * ps auxf * top * systemctl * + more Weirdly, the issue seems to only happen on Amazon EC2 imported machines, and not when running under ESXi, although this may be a red herring. strace-ing ps shows a timeout reading from some kind of DBus socket: recvmsg(6, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="/org/freedesktop/DBus\0\0\0\2\1s\0\24\0\0\0"..., iov_len=146}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = 146 > /lib/x86_64-linux-gnu/libc-2.27.so(recvmsg+0x14) [0x122934] > /lib/x86_64-linux-gnu/libnss_systemd.so.2(_nss_systemd_getpwnam_r+0xf257) [0x21df7] > /lib/x86_64-linux-gnu/libnss_systemd.so.2() [0x10fd1] > /lib/x86_64-linux-gnu/libnss_systemd.so.2(_nss_systemd_getpwuid_r+0x377) [0x12b27] > /lib/x86_64-linux-gnu/libc-2.27.so(getpwuid_r+0x145) [0xe39e5] > /lib/x86_64-linux-gnu/libc-2.27.so(getpwuid+0x98) [0xe3148] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(pwcache_get_user+0x5c) [0x5bfc] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(pwcache_get_user+0x1ebb) [0x7a5b] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(readproc+0x149) [0x8659] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(readproctab2+0x8a) [0x912a] > /bin/ps(_init+0xe3b) [0xaef3] > /lib/x86_64-linux-gnu/libc-2.27.so(__libc_start_main+0xe7) [0x21c87] > /bin/ps(_init+0x1322) [0xb3da] recvmsg(6, {msg_namelen=0}, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily unavailable) > /lib/x86_64-linux-gnu/libc-2.27.so(recvmsg+0x14) [0x122934] > /lib/x86_64-linux-gnu/libnss_systemd.so.2(_nss_systemd_getpwnam_r+0xf257) [0x21df7] > /lib/x86_64-linux-gnu/libnss_systemd.so.2() [0x10fd1] > /lib/x86_64-linux-gnu/libnss_systemd.so.2(_nss_systemd_getpwuid_r+0x377) [0x12b27] > /lib/x86_64-linux-gnu/libc-2.27.so(getpwuid_r+0x145) [0xe39e5] > /lib/x86_64-linux-gnu/libc-2.27.so(getpwuid+0x98) [0xe3148] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(pwcache_get_user+0x5c) [0x5bfc] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(pwcache_get_user+0x1ebb) [0x7a5b] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(readproc+0x149) [0x8659] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(readproctab2+0x8a) [0x912a] > /bin/ps(_init+0xe3b) [0xaef3] > /lib/x86_64-linux-gnu/libc-2.27.so(__libc_start_main+0xe7) [0x21c87] > /bin/ps(_init+0x1322) [0xb3da] ppoll([{fd=6, events=POLLIN}], 1, {tv_sec=24, tv_nsec=995725000}, NULL, 8) = 0 (Timeout) <---- > /lib/x86_64-linux-gnu/libc-2.27.so(ppoll+0x4a) [0x114c5a] > /lib/x86_64-linux-gnu/libnss_systemd.so.2(_nss_systemd_getpwnam_r+0x1795f) [0x2a4ff] > /lib/x86_64-linux-gnu/libnss_systemd.so.2() [0x1100a] > /lib/x86_64-linux-gnu/libnss_systemd.so.2(_nss_systemd_getpwuid_r+0x377) [0x12b27] > /lib/x86_64-linux-gnu/libc-2.27.so(getpwuid_r+0x145) [0xe39e5] > /lib/x86_64-linux-gnu/libc-2.27.so(getpwuid+0x98) [0xe3148] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(pwcache_get_user+0x5c) [0x5bfc] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(pwcache_get_user+0x1ebb) [0x7a5b] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(readproc+0x149) [0x8659] > /lib/x86_64-linux-gnu/libprocps.so.6.0.0(readproctab2+0x8a) [0x912a] > /bin/ps(_init+0xe3b) [0xaef3] > /lib/x86_64-linux-gnu/libc-2.27.so(__libc_start_main+0xe7) [0x21c87] > /bin/ps(_init+0x1322) [0xb3da] LSB release output: Description: Ubuntu 18.04.6 LTS Release: 18.04 Unfortunately I'm unsure how to investigate this further. 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