<html>
    <head>
      <base href="https://bugs.freedesktop.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [HSW] igt_gem_huge - DMA-API: exceeded 7 overlapping mappings of cacheline"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=100455">100455</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[HSW] igt_gem_huge - DMA-API: exceeded 7 overlapping mappings of cacheline
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>DRI git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>matthew.auld@intel.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>[  600.263405] WARNING: CPU: 2 PID: 1387 at lib/dma-debug.c:519
add_dma_entry+0x2bd/0x360
[  600.263407] DMA-API: exceeded 7 overlapping mappings of cacheline
0x000000000546cec0
[  600.263408] Modules linked in: i915(+) drm_kms_helper drm netconsole
xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun ip6t_rpfilter ip6t_REJECT
nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_broute bridge stp llc
ebtable_nat ip6table_raw ip6table_mangle ip6table_nat nf_conntrack_ipv6
nf_defrag_ipv6 nf_nat_ipv6 ip6table_security iptable_raw iptable_mangle
iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack
iptable_security ebtable_filter ebtables ip6table_filter ip6_tables
snd_usb_audio snd_usbmidi_lib eeepc_wmi asus_wmi snd_rawmidi iTCO_wdt
iTCO_vendor_support rfkill sparse_keymap intel_rapl x86_pkg_temp_thermal
coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_codec
snd_hwdep gspca_zc3xx
[  600.263459]  snd_hda_core gspca_main joydev v4l2_common snd_seq videodev
snd_seq_device media snd_pcm lpc_ich i2c_i801 mei_me snd_timer snd mei
soundcore shpchp wmi tpm_tis tpm_tis_core tpm nfsd auth_rpcgss nfs_acl lockd
grace sunrpc prime_numbers i2c_algo_bit crc32c_intel r8169 mii video [last
unloaded: i915]
[  600.263489] CPU: 2 PID: 1387 Comm: drv_selftest Tainted: G    BU  W      
4.11.0-rc4-drm-intel-debug+ #19
[  600.263490] Hardware name: ASUS All Series/Z87-K, BIOS 1401 07/29/2014
[  600.263492] Call Trace:
[  600.263497]  dump_stack+0xd5/0x150
[  600.263501]  ? _atomic_dec_and_lock+0xa0/0xa0
[  600.263504]  ? add_dma_entry+0x2bd/0x360
[  600.263508]  ? vprintk_default+0x3e/0x70
[  600.263513]  __warn+0x136/0x170
[  600.263518]  warn_slowpath_fmt+0xad/0xe0
[  600.263521]  ? __warn+0x170/0x170
[  600.263619]  ? igt_gem_huge+0x199/0x270 [i915]
[  600.263625]  ? active_cacheline_read_overlap+0x2d/0x60
[  600.263628]  add_dma_entry+0x2bd/0x360
[  600.263632]  ? active_cacheline_set_overlap.part.12+0x50/0x50
[  600.263637]  ? __save_stack_trace+0x7c/0x140
[  600.263646]  debug_dma_map_sg+0x250/0x380
[  600.263733]  i915_gem_gtt_prepare_pages+0x168/0x290 [i915]
[  600.263818]  huge_get_pages+0x1ae/0x520 [i915]
[  600.263903]  ____i915_gem_object_get_pages+0x79/0x100 [i915]
[  600.263984]  __i915_gem_object_get_pages+0x79/0xa0 [i915]
[  600.264067]  igt_gem_huge+0x199/0x270 [i915]
[  600.264148]  ? igt_gem_huge+0x5a/0x270 [i915]
[  600.264239]  __i915_subtests+0x51/0x140 [i915]
[  600.264241]  ? do_raw_spin_unlock+0x100/0x1f0
[  600.264326]  i915_gem_object_live_selftests+0x24/0x30 [i915]
[  600.264414]  __run_selftests+0x16c/0x310 [i915]
[  600.264504]  i915_live_selftests+0x4e/0x90 [i915]
[  600.264583]  i915_pci_probe+0xc3/0x190 [i915]
[  600.264661]  ? i915_pci_remove+0x50/0x50 [i915]
[  600.264665]  local_pci_probe+0x95/0x120
[  600.264670]  pci_device_probe+0x217/0x280
[  600.264674]  ? pci_device_remove+0x170/0x170
[  600.264680]  ? driver_sysfs_add+0xfe/0x1c0
[  600.264684]  driver_probe_device+0x468/0x910
[  600.264689]  ? driver_probe_device+0x910/0x910
[  600.264691]  __driver_attach+0x14e/0x190
[  600.264695]  bus_for_each_dev+0xf5/0x170
[  600.264699]  ? subsys_dev_iter_init+0xb0/0xb0
[  600.264705]  driver_attach+0x30/0x50
[  600.264708]  bus_add_driver+0x292/0x470
[  600.264714]  driver_register+0xe5/0x1d0
[  600.264718]  __pci_register_driver+0x127/0x180
[  600.264722]  ? pci_pm_runtime_idle+0xe0/0xe0
[  600.264725]  ? trace_hardirqs_on_caller+0x16/0x3f0
[  600.264730]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[  600.264734]  ? 0xffffffffc0430000
[  600.264810]  i915_init+0x89/0x92 [i915]
[  600.264814]  do_one_initcall+0xae/0x290
[  600.264818]  ? initcall_blacklisted+0x170/0x170
[  600.264823]  ? memset_erms+0xb/0x10
[  600.264827]  ? kasan_unpoison_shadow+0x35/0x50
[  600.264831]  ? __asan_register_globals+0x7c/0xa0
[  600.264837]  do_init_module+0x1a6/0x438
[  600.264842]  ? complete_formation+0x4c0/0x4c0
[  600.264845]  ? __vunmap+0x12e/0x1d0
[  600.264852]  load_module+0x38a5/0x4d80
[  600.264854]  ? disable_ro_nx+0xa0/0xa0
[  600.264867]  ? module_frob_arch_sections+0x20/0x20
[  600.264873]  ? read_code+0x20/0x20
[  600.264878]  ? __fget_light+0xd9/0x150
[  600.264883]  ? kernel_read_file_from_fd+0x49/0x80
[  600.264887]  SYSC_finit_module+0x181/0x1c0
[  600.264891]  ? SYSC_init_module+0x210/0x210
[  600.264899]  ? SyS_mmap_pgoff+0x1e0/0x640
[  600.264905]  ? trace_hardirqs_on_caller+0x16/0x3f0
[  600.264909]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[  600.264913]  SyS_finit_module+0xe/0x10
[  600.264918]  entry_SYSCALL_64_fastpath+0x1f/0xc2
[  600.264920] RIP: 0033:0x7f2a65b99239
[  600.264921] RSP: 002b:00007ffc873d63d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[  600.264924] RAX: ffffffffffffffda RBX: ffffffff8c238606 RCX:
00007f2a65b99239
[  600.264926] RDX: 0000000000000000 RSI: 00000000009ce480 RDI:
0000000000000015
[  600.264927] RBP: ffff8801c7bbff98 R08: 0000000000000000 R09:
0000000000000000
[  600.264929] R10: 0000000000000015 R11: 0000000000000246 R12:
00007ffc873d53d0
[  600.264930] R13: 00007ffc873d53b0 R14: 0000000000000005 R15:
00000000009cce00
[  600.264935]  ? trace_hardirqs_off_caller+0x16/0x1f0
[  600.264941] ---[ end trace ba5a9b744ecefaa9 ]---</pre>
        </div>
      </p>


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