Re: [OE-core] [PATCH] memory-control: add recipe and bbclass for cgroup v2 memory limiting

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Mon Jul 13, 2026 at 8:51 PM CEST, Ishaan Desai via lists.openembedded.org wrote:
> Adds a CLI tool and bbclass for applying per-service memory limits via
> systemd resource control and Linux cgroups v2.
>
> The memory-control command inspects MemoryMax and MemoryHigh settings
> for any running systemd service and lists all services with a drop-in
> applied.
>
> memory-control.bbclass allows any recipe to set a memory limit at build
> time by inheriting the class and setting MEMORY_LIMIT. Two OOM policies
> are available via MEMORY_OOM_POLICY: "reboot" (default) reboots on OOM,
> and "kill" terminates only the offending process.
>
> The recipe requires the systemd DISTRO_FEATURE via features_check so it
> is cleanly skipped on non-systemd distros. The bbclass guards its
> RDEPENDS injection with bb.utils.contains for the same reason.
>
> AI-Generated: Uses IBM Bob
>
> Signed-off-by: Ishaan Desai <Ishaan.Desai@ibm.com>

Hi Ishaan,

Thanks for your patch.

We get a warning about this new recipe during the build:

WARNING: lib32-memory-control-1.0-r0 do_unpack: lib32-memory-control: the directory ${UNPACKDIR}/${BP} (/srv/pokybuild/yocto-worker/qemux86-world-alt/build/build/tmp/work/x86-pokymllib32-linux/lib32-memory-control/1.0/sources/memory-control-1.0) pointed to by the S variable doesn't exist - please set S within the recipe to point to where the source has been unpacked to

https://autobuilder.yoctoproject.org/valkyrie/#/builders/17/builds/3970
https://autobuilder.yoctoproject.org/valkyrie/#/builders/25/builds/4125

Can you make sure everything is correct?

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com