16490 2026-11-05 12:48:37 +0000 glibc 2.43 allocates much more memory than glibc 2.39 2026-11-05 12:48:37 +0000 1 1 7 Build System, Metadata & Runtime OE-Core core 6.0.3 ARM arm64 NEW Undecided major 0.0.0 1 ecordonnier unassigned meta.mr.watcher meta.watcher --- --- No (bug/feature does not impact docs) oldest_to_newest 107305 0 ecordonnier 2026-11-05 12:48:37 +0000 We noticed this critical regression while updating from scarthgap 5.0.20 to wrynose 6.0.3: glibc 2.43 malloc allocations on aarch64 are massively bigger than on glibc 2.39. We have reported findings at https://sourceware.org/bugzilla/show_bug.cgi?id=34081 which is the upstream bug. We compared the same image based on scarthgap 5.0.20 with only glibc changed. These are system-wide readings from one cold boot per configuration, averaged over 55-180 s after boot at idle: 2.39 2.43 AnonPages (MiB) 465 1105 AnonHugePages (MiB) 0 743 MemAvailable (MiB) 1850 1214 Swap-out since boot (MiB) 0 385