This regression is introduced in 10.6 by following commit.
commit b6a2472489
MDEV-27891: SIGSEGV in InnoDB buffer pool resize
During DML, we check if buffer pool is running out of data pages in
buf_pool_t::running_out. Here is 75% of the buffer pool is occupied by
non-data pages we rollback the current transaction and exit with
ER_LOCK_TABLE_FULL.
The integer division (n_chunks_new / 4) becomes zero whenever the total
number of chunks are < 4 making the check completely ineffective for
such cases. Also the check is inaccurate for larger chunks.
Fix-1: Correct the check in buf_pool_t::running_out.
Fix-2: While waiting for free page, check for
buf_LRU_check_size_of_non_data_objects.
2d5cba22a9