memory - How to get a page from a userspace process for a given task in Linux? -



memory - How to get a page from a userspace process for a given task in Linux? -

what virt_to_page function return, homecoming page given address in kernel space or homecoming page given address in user space? far can tell seems takes kernel address , returns page that. if can utilize page user space process given task or mm_struct , virtual address?

virt_to_page() indeed work direct-mapped kernel addresses. find page userspace mapping, need utilize get_user_pages() (and put_page when you're done release reference on page).

memory linux-kernel kernel virtual-memory

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