Jeremy Fitzhardinge wrote:
> I'm wondering if activate_mm() is the right thing to be using in
> use_mm(); shouldn't this be switch_mm()?
>
> On normal x86, they're synonymous, but for the Xen patches I'm adding a
> hook which assumes that activate_mm is only used the first time a new mm
> is used after creation (I have another hook for dealing with dup_mm). I
> think this use of activate_mm() is the only place where it could be used
> a second time on an mm.
>
> From a quick look at the other architectures I think this is OK (most
> simply implement one in terms of the other), but some are doing some
> subtly different stuff between the two.
>
> Thanks,
> J
>
>
>
Er, lets try that again:
diff -r 455b71ed4525 fs/aio.c
--- a/fs/aio.c Wed Dec 06 13:16:42 2006 -0800
+++ b/fs/aio.c Wed Dec 06 17:17:43 2006 -0800
@@ -588,7 +588,7 @@ static void use_mm(struct mm_struct *mm)
* Note that on UML this *requires* PF_BORROWED_MM to be set, otherwise
* it won't work. Update it accordingly if you change it here
*/
- activate_mm(active_mm, mm);
+ switch_mm(active_mm, mm, tsk);
task_unlock(tsk);
mmdrop(active_mm);
-
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