Messages in this thread | ![/](/images/icornerl.gif) | | Date | Fri, 12 May 2023 14:03:53 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] mm: fix hugetlb page unmap count balance issue |
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On Fri, 12 May 2023 15:20:36 +0800 Junxiao Chang <junxiao.chang@intel.com> wrote:
> hugetlb page usually is mapped with pmd, but occasionally it might be > mapped with pte. QEMU can use udma-buf to create host dmabufs for guest > framebuffers. When QEMU is launched with parameter "hugetlb=on", > udmabuffer driver maps hugetlb page with pte in page fault handler.
Are there any other situations in which a hugetlb page is mapped in this fashion?
If not, can QEMU be changed to map with a pmd?
So we get one less weird special case in MM.
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