<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT] igt@kms_cursor_legacy@basic-flip-after-cursor-legacy - Incomplete" href="https://bugs.freedesktop.org/show_bug.cgi?id=103178#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT] igt@kms_cursor_legacy@basic-flip-after-cursor-legacy - Incomplete" href="https://bugs.freedesktop.org/show_bug.cgi?id=103178">bug 103178</a> from <a class="email" href="mailto:marta.lofstedt@intel.com" title="Marta Löfstedt <marta.lofstedt@intel.com>"> Marta Löfstedt</a> <pre>Note, data from: <a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3196/fi-glk-1/dmesg-1507288911_Oops_1.log">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3196/fi-glk-1/dmesg-1507288911_Oops_1.log</a> <14>[ 569.068084] [IGT] drv_module_reload: starting subtest basic-reload ... <1>[ 569.561140] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 should be ignorded. So, this is a "plain" kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:880! hence it should be duplicate of <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED DUPLICATE - [CI] igt@kms_ccs@pipe-A-crc-primary-rotation-180 - incomplete panic - kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:880!" href="show_bug.cgi?id=103190">BUG 103190</a>, which is now duplicate of BUG 102035. Also, quote from IRC 2017-10-11: <marta_> dolphin, ickle : this on APL-shards there has now been 3 occurences of kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:880! in 7 CI runs. see bug: <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED DUPLICATE - [CI] igt@kms_ccs@pipe-A-crc-primary-rotation-180 - incomplete panic - kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:880!" href="show_bug.cgi?id=103190">https://bugs.freedesktop.org/show_bug.cgi?id=103190</a> <dolphin> marta_: does it happen to have IOMMU on, by any chance? <dolphin> aka. Intel VT-d turned on from BIOS * itoral (~<a href="mailto:itoral@fanzine.igalia.com">itoral@fanzine.igalia.com</a>) has joined * danvet (~Daniel@2a02:168:5635:0:39d2:f87e:2033:9f6) has joined <dolphin> If you can try running "intel_iommu=off" instead of igfx_off, that'd give a datapoint * cristi (~<a href="mailto:majeru@131.228.216.128">majeru@131.228.216.128</a>) has joined <dolphin> marta_: it's the same issue as with <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT] kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:604!" href="show_bug.cgi?id=102035">https://bugs.freedesktop.org/show_bug.cgi?id=102035</a> <marta_> thanks dolphin I will dup <marta_> tsa is dolphin suggestion ^^ something to test? * xerpi (~<a href="mailto:xerpi@59.red-88-23-235.staticip.rima-tde.net">xerpi@59.red-88-23-235.staticip.rima-tde.net</a>) has joined <tsa> need to pick up one APL shard and check bios option / test kernel param <tsa> looking at the 3206 missing htmls now\ * lemonzest (~lemonzest@unaffiliated/lemonzest) has joined * [Enrico] (~chiccoroc@gentoo/contributor/Enrico) has joined <dolphin> marta_: yep, double-checked it, there just have been additions to the file <dolphin> it may be more convenient for you guys to look at the actual line of code in the file, when filing bug <dolphin> this this case: GEM_BUG_ON(status & GEN8_CTX_STATUS_PREEMPTED); <dolphin> so the bug could be best identified as intel_lrc_irq_handler()/GEM_BUG_ON(status & GEN8_CTX_STATUS_PREEMPTED) <dolphin> If we had not been having the same error before we added any pre-emption code, one would think there's an error in the pre-emption code, but it failed before</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> <li>You are the assignee for the bug.</li> </ul> </body> </html>