<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [GM45] igt@gem_mmap_gtt@basic-small-bo-tiledx - fail - Failed assertion: memcmp(ptr , tiled_pattern, PAGE_SIZE) == 0 (edit)" href="https://bugs.freedesktop.org/show_bug.cgi?id=106848#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [GM45] igt@gem_mmap_gtt@basic-small-bo-tiledx - fail - Failed assertion: memcmp(ptr , tiled_pattern, PAGE_SIZE) == 0 (edit)" href="https://bugs.freedesktop.org/show_bug.cgi?id=106848">bug 106848</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>If my reading is correct e6cbd7f2efb433d717af72aa8510a9db6f7a7e05 just perturbs the physical page address. You have 6GiB, right? Could you try with mem=3G (my guess is that will limit it to the *low* 3G!) That was a gen4 bug with >4G memory, but we believed it to be Broadwater/Crestline and not G4x; anyway it sounds like we should just restrict our allocations to DMA32. Try: diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index fd882eb389d2..e6b48adf0fae 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4720,7 +4720,7 @@ i915_gem_object_create(struct drm_i915_private *dev_priv, u64 size) goto fail; mask = GFP_HIGHUSER | __GFP_RECLAIMABLE; - if (IS_I965GM(dev_priv) || IS_I965G(dev_priv)) { + if (IS_GEN4(dev_priv)) { /* 965gm cannot relocate objects above 4GiB. */ mask &= ~__GFP_HIGHMEM; mask |= __GFP_DMA32;</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> <li>You are on the CC list for the bug.</li> </ul> </body> </html>