bcachefs: Introduce a separate journal watermark for copygc

Browse source

Since journal reclaim -> btree key cache flushing may require the
allocation of new btree nodes, it has an implicit dependency on copygc
in order to make forward progress - so we should avoid blocking copygc
unless the journal is really close to full.

This introduces watermarks to replace our single MAY_GET_UNRESERVED bit
in the journal, and adds a watermark for copygc and plumbs it through.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

...

This commit is contained in:

Kent Overstreet 2022-03-14 21:48:42 -04:00 • committed by Kent Overstreet

parent d905f67ec8

commit 31f63fd124

11 changed files with 108 additions and 83 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

fs/bcachefs/alloc_background.c

View file

2

fs/bcachefs/btree_key_cache.c

View file

7

fs/bcachefs/btree_update.h

View file

9

fs/bcachefs/btree_update_interior.c

View file

12

fs/bcachefs/btree_update_leaf.c

View file

51

fs/bcachefs/journal.c

View file

49

fs/bcachefs/journal.h

View file

8

fs/bcachefs/journal_reclaim.c

View file

41

fs/bcachefs/journal_types.h

View file

2

fs/bcachefs/movinggc.c

View file

5

fs/bcachefs/recovery.c

View file