On Tue, Nov 28, 2023 at 5:34 PM Robin Murphy <robin.murphy@xxxxxxx> wrote: > > On 2023-11-28 8:49 pm, Pasha Tatashin wrote: > > Convert iommu/dma-iommu.c to use the new page allocation functions > > provided in iommu-pages.h. > > These have nothing to do with IOMMU pagetables, they are DMA buffers and > they belong to whoever called the corresponding dma_alloc_* function. Hi Robin, This is true, however, we want to account and observe the pages allocated by IOMMU subsystem for DMA buffers, as they are essentially unmovable locked pages. Should we separate IOMMU memory from KVM memory all together and add another field to /proc/meminfo, something like "iommu -> iommu pagetable and dma memory", or do we want to export DMA memory separately from IOMMU page tables? Since, I included DMA memory, I specifically removed mentioning of IOMMU page tables in the most of places, and only report it as IOMMU memory. However, since it is still bundled together with SecPageTables it can be confusing. Pasha
