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bcachefs: Fix bch2_btree_update_start() to return -BCH_ERR_journal_reclaim_would_deadlock

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On failure to get a journal pre-reservation because we're called from
journal reclaim we're not supposed to return a transaction restart error
- this fixes a livelock.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2022-08-27 12:37:05 -04:00
parent 8a9c1b1cb0
commit d97e6aaed6
1 changed files with 5 additions and 0 deletions
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5
fs/bcachefs/btree_update_interior.c
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@@ -1049,6 +1049,11 @@ bch2_btree_update_start(struct btree_trans *trans, struct btree_path *path,
if (ret) {
bch2_trans_unlock(trans);
if (flags & BTREE_INSERT_JOURNAL_RECLAIM) {
ret = -BCH_ERR_journal_reclaim_would_deadlock;
goto err;
}
ret = bch2_journal_preres_get(&c->journal, &as->journal_preres,
BTREE_UPDATE_JOURNAL_RES,
journal_flags);