[Bug 209025] The "VFIO_MAP_DMA failed: Cannot allocate memory" bug is back

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https://bugzilla.kernel.org/show_bug.cgi?id=209025

--- Comment #10 from Jens Axboe (axboe@xxxxxxxxx) ---
> I'm a fellow Arch Linux user (on all my private machines) and actually
> suspect
> its current QEMU and other package versions were necessary to expose this bug
> and are the reason Alex could not reproduce this.

Newer qemu versions use io_uring for faster IO, hence that's why you'd see it.
If you're not using io_uring at all, you would not trigger the imbalance.

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