On Fri, Jun 20, 2025 at 09:09:55AM -0600, Caleb Sander Mateos wrote:
> struct ublk_device's __queues points to an allocation with up to
> UBLK_MAX_NR_QUEUES (4096) queues, each of which have:
> - struct ublk_queue (48 bytes)
> - Tail array of up to UBLK_MAX_QUEUE_DEPTH (4096) struct ublk_io's,
> 32 bytes each
> This means the full allocation can exceed 512 MB, which may well be
> impossible to service with contiguous physical pages. Switch to
> kvcalloc() and kvfree(), since there is no need for physically
> contiguous memory.
>
> Signed-off-by: Caleb Sander Mateos <csander@xxxxxxxxxxxxxxx>
> Fixes: 71f28f3136af ("ublk_drv: add io_uring based userspace block driver")
Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
Thanks,
Ming
