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bcachefs: fix race in bch2_btree_node_evict() 

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-04-11 23:58:36 -04:00
parent 2aeed876d7
commit 7b4c4ccf84
1 changed files with 3 additions and 1 deletions
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4
fs/bcachefs/btree_cache.c
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@ -1148,6 +1148,8 @@ wait_on_io:
btree_node_lock_nopath_nofail(trans, &b->c, SIX_LOCK_intent);
btree_node_lock_nopath_nofail(trans, &b->c, SIX_LOCK_write);
if (unlikely(b->hash_val != btree_ptr_hash_val(k)))
goto out;
if (btree_node_dirty(b)) {
__bch2_btree_node_write(c, b, BTREE_WRITE_cache_reclaim);
@ -1162,7 +1164,7 @@ wait_on_io:
btree_node_data_free(c, b);
bch2_btree_node_hash_remove(bc, b);
mutex_unlock(&bc->lock);
out:
six_unlock_write(&b->c.lock);
six_unlock_intent(&b->c.lock);
}