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v1.20.x - UCT/IB: disable indirect atomic registration for direct nic (#11111) #11148

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Merged
roiedanino merged 2 commits into from
Feb 5, 2026
Merged

v1.20.x - UCT/IB: disable indirect atomic registration for direct nic (#11111) #11148

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7d784a4
UCT/IB: disable indirect atomic registration for direct nic (#11111)
roiedanino Jan 22, 2026
1775883
UCT/IB/BASE: fixed ib mem handle flags enum order
roiedanino Jan 27, 2026
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2 changes: 2 additions & 0 deletions src/uct/ib/base/ib_md.h
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Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,8 @@ enum {
#endif
UCT_IB_MEM_FLAG_GVA = UCS_BIT(5), /**< The memory handle is a
GVA region */
UCT_IB_MEM_DIRECT_NIC = UCS_BIT(6), /**< The memory handle was
registered using Direct NIC */
};

enum {
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2 changes: 2 additions & 0 deletions src/uct/ib/mlx5/dv/ib_mlx5dv_md.c
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Original file line number Diff line number Diff line change
Expand Up @@ -856,6 +856,7 @@ uct_ib_mlx5_devx_reg_mr(uct_ib_mlx5_md_t *md, uct_ib_mlx5_devx_mem_t *memh,
length, params,
access_flags);
if (memh->mrs[mr_type].super.ib != NULL) {
memh->super.flags |= UCT_IB_MEM_DIRECT_NIC;
goto out;
}

Expand Down Expand Up @@ -2946,6 +2947,7 @@ uct_ib_mlx5_devx_mkey_pack(uct_md_h uct_md, uct_mem_h uct_memh,
((memh->super.flags & UCT_IB_MEM_ACCESS_REMOTE_ATOMIC) ||
uct_ib_mlx5_devx_memh_has_ro(md, memh)) &&
!(memh->super.flags & UCT_IB_MEM_IMPORTED) &&
!(memh->super.flags & UCT_IB_MEM_DIRECT_NIC) &&
md->super.config.enable_indirect_atomic &&
ucs_test_all_flags(md->flags,
UCT_IB_MLX5_MD_FLAG_KSM |
Expand Down