[PATCH 0/2] btrfs: prepare and move async csum generation out of experimental feautres

[Qu Wenruo <wqu@suse.com>]

Sashiko exposed several problems related to previous default async csum
generation, one fix related to encoded writes is already merged.

The remaining problem is related to the endio_workers reuse, which can
lead to problems as there are two different workloads in one workqueue,
and one workload (btrfs_bio_csum()) can even queue a new work into the
same workqueue.

The remaining problem is fixed by the first patch, by changing
btrfs_fs_info::workers into a regular workqueue, and let the
experimental csum generation to reuse it.

Then we can finally enable async data csum generation by default to
improve the data write performance, and completely get rid of the old
csum offloading behavior.

Qu Wenruo (2):
  btrfs: make btrfs_fs_info::workers to be a regular workqueue
  btrfs: move async data csum generation out of experimental features

 fs/btrfs/Kconfig     |   2 -
 fs/btrfs/bio.c       | 139 +------------------------------------------
 fs/btrfs/disk-io.c   |  47 ++++++---------
 fs/btrfs/file-item.c |  12 ++--
 fs/btrfs/file-item.h |   2 +-
 fs/btrfs/fs.h        |  17 +-----
 fs/btrfs/super.c     |   2 +-
 7 files changed, 30 insertions(+), 191 deletions(-)

-- 
2.56.0