Re: [PATCH v2 1/2] memcg: move mem_cgroup_swappiness and vm_swappiness to mm/swap.h
Barry Song <[email protected]>
| Newsgroups | org.kernel.vger.cgroups,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <CAGsJ_4yYeLjgn5xRqfOeXiawg3WhrU3b1JMwpv7AQzOjjW7C+w@mail.gmail.com> |
On Thu, Jul 16, 2026 at 11:18 AM Ridong <[email protected]> wrote: > > From: Ridong Chen <[email protected]> > > The per-memcg swappiness knob is v1-only; v2 always uses global > vm_swappiness and ignores the per-cgroup field. > > Both mem_cgroup_swappiness() and vm_swappiness are only used within > mm/ (memcontrol.c, memcontrol-v1.c, vmscan.c), so move them out of the > public include/linux/swap.h into the mm-private mm/swap.h. This keeps > unrelated declarations out of include/linux/swap.h. > > Guard memcg->swappiness with CONFIG_MEMCG_V1 as well, so v2-only > kernels drop the unused field. > > No functional change for v1; v2-only kernels drop the unused field. > > Signed-off-by: Ridong Chen <[email protected]> > --- Reviewed-by: Barry Song <[email protected]>