On Mon, Oct 19, 2020 at 11:14 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
On Mon, Oct 19, 2020 at 10:56:20PM +0800, Xie Yongji wrote:
> Export zap_page_range() for use in VDUSE.
I think you're missing a lot of MMU notifier work by calling this
directly. It probably works in every scenario you've tested, but won't
work for others. I see you're using VM_MIXEDMAP -- would it make sense
to use VM_PFNMAP instead and use zap_vma_ptes()?
But I didn't see any difference between zap_vma_ptes() and zap_page_range() about MMU notifier. Could you give me more details?
Thanks,
Yongji
Or would it make sense
to change zap_vma_ptes() to handle VM_MIXEDMAP as well as VM_PFNMAP?
