bcachefs: Evict/bypass key cache when deleting

Fix a performance bug when doing many unlinks.

The btree has optimizations to ensure we don't have too many whiteouts
to scan in peek() before we find a real key to return, but unflushed key
cache deletions break this.

To fix this, tweak the existing code for redirecting updates that create
a key to the underlying btree so that we can use it for deletions as
well.

Reported-by: John Schoenick <johns@valvesoftware.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

0 files changed, 0 insertions, 0 deletions