[Libhugetlbfs-devel] libbugetlbfs: Test case for powerpc huge_ptep_set_wrprotect() bug

[Nishanth Aravamudan]

On 07.07.2008 [17:19:55 +1000], David Gibson wrote:
> Until very recently (in fact, even now in mainline) powerpc kernels
> had a bug in huge_ptep_set_wrprotect() which meant the 'huge' flag was
> not passed down to pte_update() and hpte_need_flush().  This meant the
> hash ptes for hugepages would not be correctly flushed on fork(),
> allowing the parent to pollute the child's mapping after the fork().
> 
> This patch adds a testcase to libhugetlbfs for this behaviour, also
> doing some other checking of the COW semantics over a fork().
> 
> Signed-off-by: David Gibson <david at gibson.dropbear.id.au>

Applied, thanks,
Nish
-- 
Nishanth Aravamudan <nacc at us.ibm.com>
IBM Linux Technology Center