On Wed, 22 Nov 2023 13:33:48 -0800 Andrew Morton [off-list ref] wrote:

On Wed, 22 Nov 2023 16:11:49 -0500 Gregory Price [off-list ref] wrote:

quoted

echo "default" > /proc/pid/mempolicy
echo "prefer=relative:0" > /proc/pid/mempolicy
echo "interleave:0-3" > /proc/pid/mempolicy

What do we get when we read from this?  Please add to changelog.

Also a description of the permissions for this procfs file, along with
reasoning.  If it has global readability, and there's something
interesting in there, let's show that the security implications have
been fully considered.