On Thu, 30 Nov 2023 07:36:54 -0800 Dan Schatzberg <schatzberg.dan@xxxxxxxxx> wrote: > Allow proactive reclaimers to submit an additional swappiness=<val> > argument to memory.reclaim. This overrides the global or per-memcg > swappiness setting for that reclaim attempt. > > For example: > > echo "2M swappiness=0" > /sys/fs/cgroup/memory.reclaim > > will perform reclaim on the rootcg with a swappiness setting of 0 (no > swap) regardless of the vm.swappiness sysctl setting. > > Signed-off-by: Dan Schatzberg <schatzberg.dan@xxxxxxxxx> > --- > include/linux/swap.h | 3 ++- > mm/memcontrol.c | 55 +++++++++++++++++++++++++++++++++++--------- > mm/vmscan.c | 13 +++++++++-- Documentation/admin-guide/cgroup-v2.rst is feeling unloved! Please check whether this interface change can lead to non-backward-compatible userspace. If someone's script does the above echo command, will it break on older kernels? If so, does it matter?
