io_uring: move cancel hash tables to kvmalloc/kvfree

Convert to using kvmalloc/kfree() for the hash tables, and while at it,
make it handle low memory situations better.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2024-09-30 17:11:32 -06:00
commit b6b3eb19dd