Hello, if get_user_pages is used on a hugetlb vma, and there was no previous write to the pages, follow_hugetlb_page will call ret = hugetlb_fault(mm, vma, vaddr, 0), although the page should be used for write access in get_user_pages.
We currently see this when testing Infiniband on ppc64 with ehca + hugetlbfs. >From reading the code this should also be an issue on other architectures. Roland, Adam, are you aware of anything in this area with mellanox Infiniband cards or other usages with I/O adapters? Gruss / Regards Christoph R. + Nam Ng. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
