Hi Nirmoy, ... > > diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c > > index a2195e28b625..57a2dda2c3cc 100644 > > --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c > > +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c > > @@ -276,7 +276,7 @@ static vm_fault_t vm_fault_cpu(struct vm_fault *vmf) > > /* PTEs are revoked in obj->ops->put_pages() */ > > err = remap_io_sg(area, > > area->vm_start, area->vm_end - area->vm_start, > > - obj->mm.pages->sgl, iomap); > > + obj->mm.pages->sgl, 0, iomap); > > Why don't we need partial mmap for CPU but only for GTT ? As far as I understood we don't. I have a version with the CPU offset as well in trybot[*] But without support for segmented buffer objects, I don't know how much this has any effect. > Sounds like this also need to be cover by a IGT tests. Yes, I it does need some igt work, working on it. > Don't we need "Fixes" tag for this? Why should we? I'm not fixing anything here, I'm just recalculating the mapping not starting from the beginning of the scatter page. Andi [*] https://patchwork.freedesktop.org/patch/584474/?series=131539&rev=2
