On 03/15/2014 06:47 AM, Aneesh Kumar K.V wrote: > From: "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com> > > We have generic code like the one in get_futex_key that assume that > a local_irq_disable prevents a parallel THP split. Support that by > adding a dummy smp call function after setting _PAGE_SPLITTING. Code > paths like get_user_pages_fast still need to check for _PAGE_SPLITTING > after disabling IRQ which indicate that a parallel THP splitting is > ongoing. Now if they don't find _PAGE_SPLITTING set, then we can be > sure that parallel split will now block in pmdp_splitting flush > until we enables IRQ > > Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
Acked-by: Rik van Riel <r...@redhat.com> -- All rights reversed _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
