Re: [PATCH net-next V4 5/5] vhost: access vq metadata through kernel virtual address

Jason Wang
2019-01-25T09:24:16Z

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