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Code Issues Releases Wiki Activity

bcachefs: Fix deadlock in journal replay 

btree_key_can_insert_cached() should be checking the watermark -
BCH_TRANS_COMMIT_journal_replay really means nonblocking mode when
watermark < reclaim, it was being used incorrectly.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-04-12 21:07:05 -04:00
parent 4518e80adf
commit 82cf18f23e
1 changed files with 4 additions and 3 deletions
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7
fs/bcachefs/btree_trans_commit.c
View File

@ -397,12 +397,13 @@ static int btree_key_can_insert_cached(struct btree_trans *trans, unsigned flags
struct bkey_cached *ck = (void *) path->l[0].b;
unsigned new_u64s;
struct bkey_i *new_k;
unsigned watermark = flags & BCH_WATERMARK_MASK;
EBUG_ON(path->level);
if (!test_bit(BKEY_CACHED_DIRTY, &ck->flags) &&
bch2_btree_key_cache_must_wait(c) &&
!(flags & BCH_TRANS_COMMIT_journal_reclaim))
if (watermark < BCH_WATERMARK_reclaim &&
!test_bit(BKEY_CACHED_DIRTY, &ck->flags) &&
bch2_btree_key_cache_must_wait(c))
return -BCH_ERR_btree_insert_need_journal_reclaim;
/*