<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000" href="https://bugs.freedesktop.org/show_bug.cgi?id=78274#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000" href="https://bugs.freedesktop.org/show_bug.cgi?id=78274">bug 78274</a> from <a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> lu hua</a> <pre>Many igt cases also have this issue. Run ./gem_exec_nop --run-subtest render, It doesn't exit testing. output: IGT-Version: 1.6-g4bd9fe6 (x86_64) (Linux: 3.15.0-rc3_drm-intel-nightly_5e83a7_20140506+ x86_64) Time to exec x 1: 128.000Âµs (ring=render) Time to exec x 2: 74.000Âµs (ring=render) Time to exec x 4: 29.000Âµs (ring=render) Time to exec x 8: 19.125Âµs (ring=render) Time to exec x 16: 11.875Âµs (ring=render) Time to exec x 32: 6.656Âµs (ring=render) Time to exec x 64: 6.016Âµs (ring=render) Time to exec x 128: 5.078Âµs (ring=render) Time to exec x 256: 4.672Âµs (ring=render) dmesg [ 128.955986] BUG: unable to handle kernel paging request at ffffc900110a0000 [ 128.956037] IP: [<ffffffff812e6803>] iowrite32+0xe/0x28 [ 128.956075] PGD 14a80e067 PUD 14a80f067 PMD 145448067 PTE 0 [ 128.956117] Oops: 0002 [#1] SMP [ 128.956142] Modules linked in: dm_mod snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support ppdev snd_hda_intel snd_hda_controller pcspkr i2c_i801 snd_hda_codec snd_hwdep snd_pcm lpc_ich mfd_core snd_timer snd soundcore battery parport_pc parport ac acpi_cpufreq i915 video button drm_kms_helper drm [ 128.956348] CPU: 0 PID: 4569 Comm: gem_exec_nop Not tainted 3.15.0-rc3_drm-intel-nightly_5e83a7_20140506+ #2350 [ 128.956407] task: ffff88014651de80 ti: ffff8801448a8000 task.ti: ffff8801448a8000 [ 128.956452] RIP: 0010:[<ffffffff812e6803>] [<ffffffff812e6803>] iowrite32+0xe/0x28 [ 128.956501] RSP: 0018:ffff8801448a9c00 EFLAGS: 00010292 [ 128.956534] RAX: 00000000fffff38f RBX: ffff880002d41780 RCX: 000000000001ffd8 [ 128.956573] RDX: 000000000001ffe8 RSI: ffffc900110a0000 RDI: ffffc900110a0000 [ 128.956613] RBP: 0000000000000002 R08: 00000000000144c0 R09: ffff8800a8bbae78 [ 128.956655] R10: ffff8800a8bbae78 R11: 0000000000000000 R12: ffff880002d40000 [ 128.956695] R13: 0000000000000000 R14: 0000000000022040 R15: ffff8800a3831120 [ 128.956738] FS: 00007ff717b848c0(0000) GS:ffff88014f400000(0000) knlGS:0000000000000000 [ 128.956784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 128.956815] CR2: ffffc900110a0000 CR3: 000000014488d000 CR4: 00000000003407f0 [ 128.956859] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 128.956902] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 128.956945] Stack: [ 128.956959] ffffffffa008a5fe 000000000081c000 0000000000000004 ffff880002d41780 [ 128.957008] ffff880002d40000 ffff8800a88c7200 0000000000000000 ffff880002d41780 [ 128.957056] ffffffffa0089960 ffff8800a88c7200 ffffffffa008c364 0000000000000000 [ 128.957104] Call Trace: [ 128.957135] [<ffffffffa008a5fe>] ? gen6_signal+0xd7/0x10c [i915] [ 128.957182] [<ffffffffa0089960>] ? gen6_add_request+0x13/0x88 [i915] [ 128.957229] [<ffffffffa008c364>] ? intel_ring_flush_all_caches+0x1c/0x29 [i915] [ 128.957283] [<ffffffffa007916c>] ? __i915_add_request+0x1c4/0x1e3 [i915] [ 128.957333] [<ffffffffa0074eb1>] ? i915_gem_do_execbuffer.isra.16+0x1005/0x1147 [i915] [ 128.957383] [<ffffffff81051aae>] ? ttwu_do_wakeup+0xe/0x79 [ 128.957426] [<ffffffffa00754c1>] ? i915_gem_execbuffer2+0x177/0x1fa [i915] [ 128.957474] [<ffffffffa0002f52>] ? drm_ioctl+0x25c/0x3ad [drm] [ 128.957515] [<ffffffffa007534a>] ? i915_gem_execbuffer+0x357/0x357 [i915] [ 128.957560] [<ffffffff81726343>] ? __schedule+0x638/0x77e [ 128.957595] [<ffffffff810eea63>] ? do_vfs_ioctl+0x3ec/0x435 [ 128.957633] [<ffffffff810eeaf5>] ? SyS_ioctl+0x49/0x78 [ 128.957668] [<ffffffff8172dba2>] ? system_call_fastpath+0x16/0x1b [ 128.957706] Code: 48 89 f7 76 05 e9 45 5b d4 ff 48 81 fe 00 00 01 00 77 09 48 c7 c6 2d a1 9b 81 eb aa c3 48 81 fe ff ff 03 00 89 f8 48 89 f7 76 03 <89> 06 c3 48 81 fe 00 00 01 00 76 05 0f b7 d6 ef c3 48 c7 c6 86 [ 128.957942] RIP [<ffffffff812e6803>] iowrite32+0xe/0x28 [ 128.957978] RSP <ffff8801448a9c00> [ 128.958000] CR2: ffffc900110a0000 [ 128.958021] ---[ end trace 13d907d4a9e6b3e4 ]---</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>