On 5/22/2024 12:03 PM, Morten Brørup wrote: >> From: Ferruh Yigit [mailto:ferruh.yi...@amd.com] >> Sent: Wednesday, 22 May 2024 12.01 >> >> On 5/22/2024 2:25 AM, Du, Frank wrote: >>>> From: Ferruh Yigit <ferruh.yi...@amd.com> >>>> Sent: Wednesday, May 22, 2024 1:58 AM >>>> >>>> Isn't there a mempool flag that can help us figure out mempool is not IOVA >>>> contiguous? Isn't it sufficient on its own? >>> >>> Indeed, what we need to ascertain is whether it's contiguous in CPU virtual >> space, not IOVA. I haven't come across a flag specifically for CPU virtual >> contiguity. The major limitation in XDP is XSK UMEM only supports registering >> a single contiguous virtual memory area. >>> >> >> 'RTE_MEMPOOL_F_NO_IOVA_CONTIG' is the flag I was looking for. This flag >> being *cleared* implies IOVA contiguous but not sure if it is >> guaranteed, need to check. > > Wrong. > RTE_MEMPOOL_F_NO_IOVA_CONTIG only relates to individual objects in the pool. > This flag being cleared only means that each individual object in the mempool > is IOVA contiguous. > It does not imply that the entire pool of objects is IOVA contiguous. >
Ah, thanks for clarification.
