Matthew,
Maximum Source Range Count (MSRC) is limited by u8. So the maximum
number of source ranges is 256 (0 base value). The number of pages
required to be sent to the device is at most 2. Since we are
allocating the memory using kmalloc_array(), we would get a continuous
physical segment. nvme_
On Fri, Feb 19, 2021 at 06:15:16PM +0530, SelvaKumar S wrote:
> + struct nvme_copy_range *range = NULL;
[...]
> + range = kmalloc_array(nr_range, sizeof(*range),
> + GFP_ATOMIC | __GFP_NOWARN);
[...]
> + req->special_vec.bv_page = virt_to_page(range);
> + req->sp
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