<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Xorg segfault on cpu which does not support PAT" href="https://bugs.freedesktop.org/show_bug.cgi?id=110774#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Xorg segfault on cpu which does not support PAT" href="https://bugs.freedesktop.org/show_bug.cgi?id=110774">bug 110774</a> from <a class="email" href="mailto:ssheribe@redhat.com" title="Snir Sheriber <ssheribe@redhat.com>"> Snir Sheriber</a> <pre>The kernel is already failing DRM_IOCTL_I915_GEM_MMAP with I915_MMAP_WC flag if PAT is not supported so that brw_bo_map_wc returns null. I'm not familiar with this code nor the graphical stack but as i saw on other code parts usually when brw_bo_map is called the returned value is checked, in this case calling brw_bo_map assumes success, which results in segfault. (BTW is it possible to somehow not to avoid the gtt_map in this case?)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>