There is no other effect of disabling CONFIG_BASE_FULL save for changing
CONFIG_BASE_SMALL.
CONFIG_BASE_SMALL won't have much effect save for other memory savings
that really would be able to reduce some runtime performance. As for
boot time, changing this setting should not be expected to cause any
significant changes.
At focal, we have:
arch/x86/include/asm/mpspec.h: changes MAX_MP_BUSSES only on 32-bit systems.
drivers/tty/vt/vc_screen.c: change is not effective on memory reducing as of
commit fcdba07ee390d
include/linux/udp.h:
include/linux/xarray.h:
kernel/futex.c:
kernel/user.c:
These are all reducing the initial size of hash structures, causing more list
traversals to happen when there are hash collisions. From here, there would be
some negative effect on runtime execution, but memory allocation of these
hashes should not introduce significant boot time regression as I mentioned.
So, all in all, there is really no reason to keep CONFIG_BASE_SMALL=1 in
any of the kernels we ship.
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-kvm (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-kvm (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: linux-kvm (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux-kvm (Ubuntu Groovy)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1866149
Title:
CONFIG_BASE_SMALL=1 restricts pid space, which conflicts with systemd
default sysctl
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1866149/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
