[v1,0/6] memcg-v1: fully deprecate charge moving

Message

Shakeel Butt Oct. 25, 2024, 1:22 a.m. UTC

The memcg v1's charge moving feature has been deprecated for almost 2
years and the kernel warns if someone try to use it. This warning has
been backported to all stable kernel and there have not been any report
of the warning or the request to support this feature anymore. Let's
proceed to fully deprecate this feature.

Changes since RFC:
- Writing 0 to memory.move_charge_at_immigrate is allowed.
- Remove the memcg move locking in separate patches.

Shakeel Butt (6):
  memcg-v1: fully deprecate move_charge_at_immigrate
  memcg-v1: remove charge move code
  memcg-v1: no need for memcg locking for dirty tracking
  memcg-v1: no need for memcg locking for writeback tracking
  memcg-v1: no need for memcg locking for MGLRU
  memcg-v1: remove memcg move locking code

 .../admin-guide/cgroup-v1/memory.rst          |  82 +-
 fs/buffer.c                                   |   5 -
 include/linux/memcontrol.h                    |  59 --
 mm/filemap.c                                  |   1 -
 mm/memcontrol-v1.c                            | 958 +-----------------
 mm/memcontrol-v1.h                            |   6 -
 mm/memcontrol.c                               |  14 -
 mm/page-writeback.c                           |  20 +-
 mm/rmap.c                                     |   1 -
 mm/vmscan.c                                   |  11 -
 10 files changed, 8 insertions(+), 1149 deletions(-)

Comments

Shakeel Butt Oct. 25, 2024, 1:33 a.m. UTC | #1

On Thu, Oct 24, 2024 at 06:22:57PM GMT, Shakeel Butt wrote:
> The memcg v1's charge moving feature has been deprecated for almost 2
> years and the kernel warns if someone try to use it. This warning has
> been backported to all stable kernel and there have not been any report
> of the warning or the request to support this feature anymore. Let's
> proceed to fully deprecate this feature.
> 
> Changes since RFC:
> - Writing 0 to memory.move_charge_at_immigrate is allowed.
> - Remove the memcg move locking in separate patches.
> 
> Shakeel Butt (6):
>   memcg-v1: fully deprecate move_charge_at_immigrate
>   memcg-v1: remove charge move code
>   memcg-v1: no need for memcg locking for dirty tracking
>   memcg-v1: no need for memcg locking for writeback tracking
>   memcg-v1: no need for memcg locking for MGLRU
>   memcg-v1: remove memcg move locking code
> 

Please ignore the patch at [1] as it was resent by mistake.

[1] https://lore.kernel.org/linux-mm/[e-mail]