lkml.org 
[lkml]   [2005]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: chasing the four level page table
On 6 Jan 2005 20:38:27 +0100, Andi Kleen <ak@muc.de> wrote:
> You can't use get_user_pages in this case because the AGP aperture
> can be above mem_map. If none of the callers take page_table_lock
> already you would need to add that too. I guess from the context the lock
> is not taken, but better double check.
>
> Perhaps we should add a get_user_phys() or somesuch for this.

No where in DRM is page_table_lock being taken. Also, no other device
driver takes page_table_lock either, so that probably implies that DRM
shouldn't start doing it to. Best solution would probably be add an mm
function for get_user_phys() that takes the lock internally. If you
add the function I'll convert DRM to use it.

--
Jon Smirl
jonsmirl@gmail.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/

\
 
 \ /
  Last update: 2005-03-22 14:09    [from the cache]
©2003-2011 Jasper Spaans