[PATCH v3 0/4] introduce uncharged file mapped folios

[Boris Burkov <boris@bur.io>]

I would like to revisit Qu's proposal to not charge btrfs extent_buffer
allocations to the user's cgroup.

https://lore.kernel.org/linux-mm/b5fef5372ae454a7b6da4f2f75c427aeab6a07d6.1727498749.git.wqu@suse.com/

I believe it is detrimental to randomly account these global pages to
the cgroup using them, basically at random. A bit more justification
and explanation in the patches themselves.

---
Changelog:
v3:
- use mod_node_page_state since we will never count cgroup stats
- include Shakeel's patch that removes a WARNING triggered by this series
v2:
- switch from filemap_add_folio_nocharge() to AS_UNCHARGED on the
  address_space.
- fix an interrupt safety bug in the vmstat patch.
- fix some foolish build errors for CONFIG_MEMCG=n


Boris Burkov (3):
  mm/filemap: add AS_UNCHARGED
  mm: add vmstat for cgroup uncharged pages
  btrfs: set AS_UNCHARGED on the btree_inode

Shakeel Butt (1):
  memcg: remove warning from folio_lruvec

 fs/btrfs/disk-io.c         |  1 +
 include/linux/memcontrol.h |  5 +----
 include/linux/mmzone.h     |  3 +++
 include/linux/pagemap.h    |  1 +
 mm/filemap.c               | 29 +++++++++++++++++++++++++----
 mm/vmstat.c                |  3 +++
 6 files changed, 34 insertions(+), 8 deletions(-)

-- 
2.50.1