)]}'
{
  "commit": "784ec69e52ff8243b4fdb280a74dac75388269e6",
  "tree": "e79a16220e282ecf877b15035f944a9eb6dd956a",
  "parents": [
    "4caadbbc5797bf81a654abb8c34ebf6258964cbe"
  ],
  "author": {
    "name": "Leon Romanovsky",
    "email": "leonro@nvidia.com",
    "time": "Thu Mar 05 13:55:03 2026 -0500"
  },
  "committer": {
    "name": "Leon Romanovsky",
    "email": "leon@kernel.org",
    "time": "Sat Mar 07 11:40:02 2026 -0500"
  },
  "message": "RDMA/umem: Tell DMA debug that cacheline overlap is expected\n\nThe RDMA subsystem exposes DMA regions through the verbs interface. A\ngiven region can be exported multiple times, which can trigger warnings\nabout cacheline overlaps. In this case the warnings are false positives,\nbecause RDMA does not use SWIOTLB and uverbs operate only on CPU‑coherent\narchitectures.\n\ninfiniband rocep8s0f0: mlx5_ib_reg_user_mr:1592:(pid 5812): start 0x2b28c000, iova 0x2b28c000, length 0x1000, access_flags 0x1\ninfiniband rocep8s0f0: mlx5_ib_reg_user_mr:1592:(pid 5812): start 0x2b28c001, iova 0x2b28c001, length 0xfff, access_flags 0x1\n ------------[ cut here ]------------\n DMA-API: mlx5_core 0000:08:00.0: cacheline tracking EEXIST, overlapping mappings aren\u0027t supported\n WARNING: kernel/dma/debug.c:620 at add_dma_entry+0x1bb/0x280, CPU#6: ibv_rc_pingpong/5812\n Modules linked in: veth xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat nf_nat xt_addrtype br_netfilter rpcsec_gss_krb5 auth_rpcgss oid_registry overlay mlx5_fwctl zram zsmalloc mlx5_ib fuse rpcrdma rdma_ucm ib_uverbs ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm mlx5_core ib_core\n CPU: 6 UID: 2733 PID: 5812 Comm: ibv_rc_pingpong Tainted: G        W           6.19.0+ #129 PREEMPT\n Tainted: [W]\u003dWARN\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n RIP: 0010:add_dma_entry+0x1be/0x280\n Code: 8b 7b 10 48 85 ff 0f 84 c3 00 00 00 48 8b 6f 50 48 85 ed 75 03 48 8b 2f e8 ff 8e 6a 00 48 89 c6 48 8d 3d 55 ef 2d 01 48 89 ea \u003c67\u003e 48 0f b9 3a 48 85 db 74 1a 48 c7 c7 b0 00 2b 82 e8 9c 25 fd ff\n RSP: 0018:ff11000138717978 EFLAGS: 00010286\n RAX: ffffffffa02d7831 RBX: ff1100010246de00 RCX: 0000000000000000\n RDX: ff110001036fac30 RSI: ffffffffa02d7831 RDI: ffffffff82678650\n RBP: ff110001036fac30 R08: ff11000110dcb4a0 R09: ff11000110dcb478\n R10: 0000000000000000 R11: ffffffff824b30a8 R12: 0000000000000000\n R13: 00000000ffffffef R14: 0000000000000202 R15: ff1100010246de00\n FS:  00007f59b411c740(0000) GS:ff110008dcc99000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007ffe538f7000 CR3: 000000010e066005 CR4: 0000000000373eb0\n Call Trace:\n  \u003cTASK\u003e\n  debug_dma_map_sg+0x1b4/0x390\n  __dma_map_sg_attrs+0x6d/0x1a0\n  dma_map_sgtable+0x19/0x30\n  ib_umem_get+0x254/0x380 [ib_uverbs]\n  mlx5_ib_reg_user_mr+0x68/0x2a0 [mlx5_ib]\n  ib_uverbs_reg_mr+0x17f/0x2a0 [ib_uverbs]\n  ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0xc2/0x130 [ib_uverbs]\n  ib_uverbs_cmd_verbs+0xa0b/0xae0 [ib_uverbs]\n  ? ib_uverbs_handler_UVERBS_METHOD_QUERY_PORT_SPEED+0xe0/0xe0 [ib_uverbs]\n  ? mmap_region+0x7a/0xb0\n  ? do_mmap+0x3b8/0x5c0\n  ib_uverbs_ioctl+0xa7/0x110 [ib_uverbs]\n  __x64_sys_ioctl+0x14f/0x8b0\n  ? ksys_mmap_pgoff+0xc5/0x190\n  do_syscall_64+0x8c/0xbf0\n  entry_SYSCALL_64_after_hwframe+0x4b/0x53\n RIP: 0033:0x7f59b430aeed\n Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 \u003c89\u003e c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00\n RSP: 002b:00007ffe538f9430 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n RAX: ffffffffffffffda RBX: 00007ffe538f94c0 RCX: 00007f59b430aeed\n RDX: 00007ffe538f94e0 RSI: 00000000c0181b01 RDI: 0000000000000003\n RBP: 00007ffe538f9480 R08: 0000000000000028 R09: 00007ffe538f9684\n R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffe538f9684\n R13: 000000000000000c R14: 000000002b28d170 R15: 000000000000000c\n  \u003c/TASK\u003e\n ---[ end trace 0000000000000000 ]---\n\nSigned-off-by: Leon Romanovsky \u003cleonro@nvidia.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "cff4fcca2c345a5a1552924a6f95056970fad3de",
      "old_mode": 33188,
      "old_path": "drivers/infiniband/core/umem.c",
      "new_id": "4ae04b6e6927ca6883d3e9d7b2c99732f6ecb12d",
      "new_mode": 33188,
      "new_path": "drivers/infiniband/core/umem.c"
    }
  ]
}