bcachefs: Fix race between btree updates & journal replay

Browse source

Add a flag to indicate whether a journal replay key has been
overwritten, and set/test it with appropriate btree locks held.

This fixes a race between the allocator - invalidating buckets, and
doing btree updates - and journal replay, which before this patch could
clobber the allocator thread's update with an older version of the key
from the journal.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

...

This commit is contained in:

Kent Overstreet 2021-12-31 17:54:13 -05:00 • committed by Kent Overstreet

parent 528b18e6d1

commit dfd41fb9f2

4 changed files with 38 additions and 2 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/bcachefs.h

View file

12

fs/bcachefs/btree_update_leaf.c

View file

25

fs/bcachefs/recovery.c

View file

2

fs/bcachefs/recovery.h

View file