On 27.10.21 14:48, Joakim Tjernlund wrote: > Using a fairly minimal kernel I get a big difference in Reserved memory, using: > qemu-system-aarch64 -machine virt -kernel arch/arm64/boot/Image -cpu cortex-a53 -nographic -m 32M > > I get this: > Linux version 5.11.0 > Memory: 24052K/32768K available (3520K kernel code, 684K rwdata, 548K rodata, 320K init, 245K bss, 8716K reserved, 0K cma-reserved) > > Versus: > > Linux version 5.10.75 > Memory: 11836K/32768K available (3518K kernel code, 684K rwdata, 540K rodata, 320K init, 244K bss, 20932K reserved, 0K cma-reserved) > > Reserving 20 MB RAM on a 32 MB is way too much, even 8Mb is a bit much for us. Are you using comparable kernel configs? Can you share them? Further, can you share /proc/meminfo and /proc/zoneinfo of both instances? (eventually, memblock=debug could be helpful as well, but it generates a lot of data) -- Thanks, David / dhildenb
