[PATCH 0/9] Remove remaining parts of congestions tracking code.

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Congestion hasn't been reliably tracked for quite some time.
Most MM uses of it for guiding writeback decisions were removed in 5.16.
Some other uses were removed in 17-rc1.

This series removes the remaining places that test for congestion, and
the few places which still set it.

The second patch touches a few filesystems.  I didn't think there was
much value in splitting this out by filesystems, but if maintainers
would rather I did that, I will.

The f2fs, cephfs, fuse, NFS, and block patches can go through the
respective trees proving the final patch doesn't land until after they
all do - so maybe it should be held for 5.18-rc2 if all the rest lands
by 5.18-rc1.

Thanks,
NeilBrown

---

NeilBrown (9):
      Remove inode_congested()
      Remove bdi_congested() and wb_congested() and related functions
      f2fs: change retry waiting for f2fs_write_single_data_page()
      f2f2: replace some congestion_wait() calls with io_schedule_timeout()
      cephfs: don't set/clear bdi_congestion
      fuse: don't set/clear bdi_congested
      NFS: remove congestion control.
      block/bfq-iosched.c: use "false" rather than "BLK_RW_ASYNC"
      Remove congestion tracking framework.


 block/bfq-iosched.c              |  2 +-
 drivers/block/drbd/drbd_int.h    |  3 --
 drivers/block/drbd/drbd_req.c    |  3 +-
 fs/ceph/addr.c                   | 27 ---------------
 fs/ceph/super.c                  |  2 --
 fs/ceph/super.h                  |  2 --
 fs/ext2/ialloc.c                 |  2 --
 fs/f2fs/compress.c               |  6 ++--
 fs/f2fs/data.c                   |  9 +++--
 fs/f2fs/segment.c                | 14 ++++----
 fs/f2fs/super.c                  |  8 ++---
 fs/fuse/control.c                | 17 ----------
 fs/fuse/dev.c                    |  8 -----
 fs/nfs/sysctl.c                  |  7 ----
 fs/nfs/write.c                   | 53 +----------------------------
 fs/nilfs2/segbuf.c               | 11 ------
 fs/xfs/xfs_buf.c                 |  3 --
 include/linux/backing-dev-defs.h |  8 -----
 include/linux/backing-dev.h      | 28 ----------------
 include/linux/nfs_fs.h           |  1 -
 include/linux/nfs_fs_sb.h        |  1 -
 include/trace/events/writeback.h | 28 ----------------
 mm/backing-dev.c                 | 57 --------------------------------
 mm/vmscan.c                      |  4 +--
 24 files changed, 25 insertions(+), 279 deletions(-)

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