From: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: kernel 5.10.x Reserves much more RAM than 5.11.0, 8 MB vs 20 MB
Date: Wed, 27 Oct 2021 12:48:13 +0000 [thread overview]
Message-ID: <71b597cb9a89c9f033861513da393501f04f4098.camel@infinera.com> (raw)
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.
Jocke
PS. I hope this is the right list, please advise if it is not.
next reply other threads:[~2021-10-27 12:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-27 12:48 Joakim Tjernlund [this message]
2021-10-27 12:57 ` kernel 5.10.x Reserves much more RAM than 5.11.0, 8 MB vs 20 MB David Hildenbrand
2021-10-27 13:20 ` Joakim Tjernlund
2021-10-27 13:35 ` Matthew Wilcox
2021-10-27 13:41 ` Joakim Tjernlund
2021-10-27 14:17 ` David Hildenbrand
2021-10-27 14:50 ` Joakim Tjernlund
2021-10-27 17:12 ` Yang Shi
2021-10-28 9:55 ` Joakim Tjernlund
2021-10-28 21:52 ` Yang Shi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=71b597cb9a89c9f033861513da393501f04f4098.camel@infinera.com \
--to=joakim.tjernlund@infinera.com \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).