bcachefs: Add a workqueue for btree io completions

Also, clean up workqueue usage - we shouldn't be using system
workqueues, pretty much everything we do needs to be on our own
WQ_MEM_RECLAIM workqueues.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-05-22 17:37:25 -04:00 • committed by Kent Overstreet
commit 731bdd2eff
8 changed files with 39 additions and 23 deletions