[PATCH RESEND] nvmet-tcp: get rid of a high-order allocation

[Christoph Hellwig]

On Fri, Jan 31, 2025 at 02:05:09PM +0200, Sagi Grimberg wrote:
> Allocating the queue commands array leads to a high order
> allocation.
> 
> The current size of nvmet_tcp_cmd is 704 bytes. Allocating
> 128 of those (default queue depth) means that we are allocating
> an array of 90K bytes. There is no reason why this will be
> a single contiguous allocation. Change the allocation to be
> kvcalloc instead.

Should we still aim for non-vmalloc allocation if easily possibe,
i.e. use kvcalloc?