How to set pages mapped to a vma to all zero

[Cheng Quan]

Hi,

Suppose I have a vma belonging to a user process and in its address range a
lot of pages are mapped.

What should I do if I want to set the data of all the page frames to zero,
without unmapping any of them or mapping any new pages?

Can zap_page_range / zap_vma_ptes do that? It seems zap functions would
unmap pages.

Thanks,
Cheng Quan
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20140516/65041f34/attachment.html