RFR: 8344882: (bf) Temporary direct buffers should not count against the upper limit on direct buffer memory

[Brian Burkhalter]

On Sat, 23 Nov 2024 18:31:11 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> While you are there, can you also look into not creating a Cleaner for the temporary direct buffers? They are explicitly deallocated when they can't be returned to the TL cache or when the thread terminates (there is a hook in thread exit for this).

At present the explicit deallocation uses the cleaner:

    private static void free(ByteBuffer buf) {
        ((DirectBuffer)buf).cleaner().clean();
    }

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PR Comment: https://git.openjdk.org/jdk/pull/22339#issuecomment-2498608413