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[v1.21.x]prov/efa: always use p2p for system memory #10398

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Sep 19, 2024
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[v1.21.x]prov/efa: always use p2p for system memory #10398

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8 changes: 3 additions & 5 deletions prov/efa/src/rdm/efa_rdm_ep.h
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Original file line number Diff line number Diff line change
Expand Up @@ -310,13 +310,11 @@ bool efa_rdm_ep_should_write_rnr_completion(struct efa_rdm_ep *ep)
static inline
int efa_rdm_ep_use_p2p(struct efa_rdm_ep *efa_rdm_ep, struct efa_mr *efa_mr)
{
if (!efa_mr)
return 0;

/*
* always send from host buffers if we have a descriptor
* P2P is always available for host memory (Unregistered buffer will be
* regarded as host memory as EFA provider requires FI_MR_HMEM)
*/
if (efa_mr->peer.iface == FI_HMEM_SYSTEM)
if (!efa_mr || efa_mr->peer.iface == FI_HMEM_SYSTEM)
return 1;

if (efa_rdm_ep_domain(efa_rdm_ep)->hmem_info[efa_mr->peer.iface].p2p_supported_by_device)
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