Re: [patch] hugetlb: correct page offset index for sharing pmd

[Hillf Danton]

On Fri, Aug 10, 2012 at 5:48 PM, Michal Hocko <mhocko@xxxxxxx> wrote:
> On Fri 03-08-12 15:32:35, Michal Hocko wrote:
>> On Fri 03-08-12 20:56:45, Hillf Danton wrote:
>> > The computation of page offset index is open coded, and incorrect, to
>> > be used in scanning prio tree, as huge page offset is required, and is
>> > fixed with the well defined routine.
>>
>> I guess that nobody reported this because if someone really wants to
>> share he will use aligned address for mmap/shmat and so the index is 0.
>> Anyway it is worth fixing. Thanks for pointing out!
>
> I have looked at the code again and I don't think there is any problem
> at all. vma_prio_tree_foreach understands page units so it will find
> appropriate svmas.
> Or am I missing something?

Well, what if another case of vma_prio_tree_foreach used by hugetlb
is correct?

Hillf
--
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/