On 2019/1/25 上午11:03, Michael S. Tsirkin wrote:
+/* Suppress the vma that needs writeback since we can not track dirty + * pages now. + */ +static bool vma_can_vmap(struct vm_area_struct *vma) +{ + return vma_is_anonymous(vma) || is_vm_hugetlb_page(vma) || + vma_is_shmem(vma); +} +IIUC a second but anonymous memory needs writeback too, just to swap. I'm not an MM person so I might be off.
Right, my fault, I mean the vma that needs dirty page tracking. Thanks
