[PATCH V7 4/6] nvmet: add ZBD over ZNS backend support

[Damien Le Moal]

On 2020/12/16 8:06, Chaitanya Kulkarni wrote:
[...]
>>> +void nvmet_bdev_execute_zone_mgmt_recv(struct nvmet_req *req)
>>> +{
>>> +	sector_t sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
>>> +	u32 bufsize = (le32_to_cpu(req->cmd->zmr.numd) + 1) << 2;
>>> +	struct nvmet_report_zone_data data = { .ns = req->ns };
>>> +	unsigned int nr_zones;
>>> +	int reported_zones;
>>> +	u16 status;
>>> +
>>> +	nr_zones = (bufsize - sizeof(struct nvme_zone_report)) /
>>> +			sizeof(struct nvme_zone_descriptor);
>> You could move this right before the vmalloc call since it is first used there.
> There are only three lines between the this and the vmalloc, does that
> really
> going to make any difference ?

It makes the code far easier to read and understand at a quick glance without
having to go up and down reading to be reminded what nr_zones was. That also
would avoid changes to sneak in between these related statements, making things
even harder to read.

I personally like to think of code as a natural language text: if statements
related to each other are not grouped in a single paragraph, the text is really
hard to understand...


-- 
Damien Le Moal
Western Digital Research