[SPDK] Re: Error in DMA transfer when process restart

The kernel vfio-pci/IOMMU will help to pin memory pages, I think it can cover the case you described here.


> -----Original Message-----
> From: Weifeng Su <swf504(a)163.com>
> Sent: Tuesday, April 20, 2021 11:30 AM
> To: spdk(a)lists.01.org
> Subject: [SPDK] Error in DMA transfer when process restart
> 
> Hi Expert,
> 
>     We are testing a new NVME disk. In the worst case, the DMA feedback
> duration of the NVME disk may reach seconds. In this case, I consider that if the
> process exits abnormally during the DMA transfer process, After another process
> restarts, it applies for the memory that is not finished. As a result, memory
> overrun may occur. However, DPDK and SPDK do not handle this problem. I
> would like to ask how the spdk is considered in this case?
>     Any feedbacks are welcome!
> 
> Brs
> Su Weifeng
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