Messages in this thread | | | Date | Wed, 29 Sep 2004 09:46:38 -0500 | From | Timur Tabi <> | Subject | Re: get_user_pages() still broken in 2.6 |
| |
Dave Hansen wrote:
> You probably want mlock(2) to keep the kernel from messing with the ptes > at all.
mlock() can only be called via sys_mlock(), which is a user-space call. Not only that, but only root can call sys_mlock(). This is not compatible with our needs.
> But, you should probably really be thinking about why you're > accessing the page tables at all. I count *ONE* instance in drivers/ > where page tables are accessed directly.
I access PTEs to get the physical addresses of a user-space buffer, so that we can DMA to/from it directly.
-- Timur Tabi Staff Software Engineer timur.tabi@ammasso.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |