Re: locking user space memory in kernel

[Manfred Spraul]

Hi Eli,

I think just get_user_pages() should be sufficient: the pages won't be 
swapped out. You don't need to set VM_LOCKED in vma->vm_flags to prevent 
the swap out. In the worst case, the pte is cleared a that will cause a 
soft page fault, but the physical address won't change. Multiple 
get_user_pages() calls on overlapping regions are ok, the page count is 
an atomic_t, at least 24-bit large.

--
   Manfred

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/