[RFC 3/3] nvme: wire up support for async passthrough

[Chaitanya Kulkarni]

On 3/4/21 03:01, Kanchan Joshi wrote:
> On Thu, Mar 4, 2021 at 3:14 AM Chaitanya Kulkarni
> <Chaitanya.Kulkarni at wdc.com> wrote:
>> On 3/2/21 23:22, Kanchan Joshi wrote:
>>> +     if (!ioucmd)
>>> +             cptr = &c;
>>> +     else {
>>> +             /*for async - allocate cmd dynamically */
>>> +             cptr = kmalloc(sizeof(struct nvme_command), GFP_KERNEL);
>>> +             if (!cptr)
>>> +                     return -ENOMEM;
>>> +     }
>>> +
>>> +     memset(cptr, 0, sizeof(c));
>> Why not kzalloc and remove memset() ?
> Yes sure. Ideally I want to get rid of the allocation cost. Perhaps
> employing kmem_cache/mempool can help. Do you think there is a better
> way?
>

Is this hot path ?