Hi, On 1/9/2025 12:22 PM, Krzysztof Karas wrote: > Hi Jacek, > > On 2025-01-08 at 11:53:46 +0100, Jacek Lawrynowicz wrote: >> drm_gem_mmap_obj() expects VM_DONTEXPAND flag to be set after mmap >> callback is executed. Set this flag at the end of i915_gem_dmabuf_mmap() >> to prevent WARN on mmap in buffers imported from i915 e.g., > ... >> +++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c >> @@ -110,6 +110,7 @@ static int i915_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct * >> if (ret) >> return ret; >> >> + vm_flags_set(vma, VM_DONTEXPAND); >> vma_set_file(vma, obj->base.filp); >> >> return 0; >> > Is this an existing issue somewhere (on GitLab for example)? The fix > looks good, I'm just curious how you noticed this problem and if the > patch should have "Fixes/Closes" labels added. We noticed the problem while running internal intel_vpu tests that import buffers from vulkan. These tests will be upstreamed at some point but currently there is no external issue for this bug. I will add Fixes tag. Jacek
