On 27.10.21 15:41, Joakim Tjernlund wrote:

On Wed, 2021-10-27 at 14:35 +0100, Matthew Wilcox wrote:

quoted

On Wed, Oct 27, 2021 at 12:48:13PM +0000, Joakim Tjernlund wrote:

quoted

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)

... you're complaining that we reduced the amount of reserved ram?
You know that 5.11.0 is more recent than 5.10.75, right?

Sort of :)
No kernel I have used earlier has reserved so much RAM in the past so I figure that
20 MB in 5.10 is a regression.

Reason for using 5.10 is that it is an LTS kernel that will be around for quite a while.

Do you have any comparison against older v5.10 kernels -- IOW, is it a
regression within the LTS kernels or has it "simply been optimized"
starting with v5.11 ?

(a lot of things count as reserved, including the initial ramdisk until
eventually freed, but I assume your setup really just exchanges the kernel)

-- 
Thanks,

David / dhildenb