*** This bug is a duplicate of bug 1824864 *** https://bugs.launchpad.net/bugs/1824864
** This bug has been marked a duplicate of bug 1824864 CONFIG_LOG_BUF_SHIFT set to 14 is too low on arm64 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1824863 Title: CONFIG_LOG_BUF_SHIFT is too low on arm64 Status in linux package in Ubuntu: Incomplete Bug description: CONFIG_LOG_BUF_SHIFT policy<{ 'amd64' : '18', 'arm64' : '14', 'armhf' : '17', 'i386' : '17', 'ppc64el': '17', 's390x' : '17'}> Please set CONFIG_LOG_BUF_SHIFT to at least 17 on arm64. Potentially bump all 64-bit arches to 18 (or higher!) as was done on amd64, meaning set 18 on arm64 s390x ppc64el. I have a systemd autopkgtest test that asserts that we see Linux kernel command line in the dmesg (journalctl -k -b). And it is consistently failing on arm64 scalingstack KVM EFI machines with messages of "missing 81 kernel messages". config LOG_BUF_SHIFT int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" range 12 25 default 17 depends on PRINTK help Select the minimal kernel log buffer size as a power of 2. The final size is affected by LOG_CPU_MAX_BUF_SHIFT config parameter, see below. Any higher size also might be forced by "log_buf_len" boot parameter. Examples: 17 => 128 KB 16 => 64 KB 15 => 32 KB 14 => 16 KB 13 => 8 KB 12 => 4 KB 14 sounds like redictiously low for arm64. given that 17 is default across 32-bit arches, and 18 is default on amd64. Please backport this to xenial and up. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1824863/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp