On to, 2017-01-19 at 12:58 +0000, Chris Wilson wrote: > For accessing large objects through the global GTT we enforce the use of > partial views, and sanity check that the vma->size doesn't overflow and > fits within the address space. To prevent 4GiB triggering the assert, > catch the attempt to create the full sized vma early. > > Testcase: igt/gem_exec_reloc/gtt-32 > Signed-off-by: Chris Wilson <[email protected]>
<SNIP> > @@ -3679,6 +3679,12 @@ i915_gem_object_ggtt_pin(struct drm_i915_gem_object > *obj, > > lockdep_assert_held(&obj->base.dev->struct_mutex); > > + /* Disallow a single VMA to occupy the entire GGTT, and catch any > + * attempt to create a normal VMA larger than the GGTT. > + */ > + if (!view && obj->base.size >= vm->total) > + return ERR_PTR(-ENOSPC); Too sloppy. How many bytes less than the full size are OK? Change the test to be > vm->total and then it's better. Reviewed-by: Joonas Lahtinen <[email protected]> Regards, Joonas -- Joonas Lahtinen Open Source Technology Center Intel Corporation _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
