Re: [PATCH V6 20/35] powerpc/mm: Don't track subpage valid bit in pte_t

2016-02-17 Thread Aneesh Kumar K.V
Paul Mackerras writes: > On Tue, Dec 01, 2015 at 09:06:45AM +0530, Aneesh Kumar K.V wrote: >> This free up 11 bits in pte_t. In the later patch we also change >> the pte_t format so that we can start supporting migration pte >> at pmd level. We now track 4k subpage valid bit as below >> >> If we

Re: [PATCH V6 20/35] powerpc/mm: Don't track subpage valid bit in pte_t

2016-02-17 Thread Paul Mackerras
On Tue, Dec 01, 2015 at 09:06:45AM +0530, Aneesh Kumar K.V wrote: > This free up 11 bits in pte_t. In the later patch we also change > the pte_t format so that we can start supporting migration pte > at pmd level. We now track 4k subpage valid bit as below > > If we have _PAGE_COMBO set, we overri

Re: [PATCH V6 20/35] powerpc/mm: Don't track subpage valid bit in pte_t

2015-12-03 Thread Aneesh Kumar K.V
Anshuman Khandual writes: > On 12/01/2015 09:06 AM, Aneesh Kumar K.V wrote: >> This free up 11 bits in pte_t. In the later patch we also change >> the pte_t format so that we can start supporting migration pte >> at pmd level. We now track 4k subpage valid bit as below >> >> If we have _PAGE_COM

Re: [PATCH V6 20/35] powerpc/mm: Don't track subpage valid bit in pte_t

2015-12-02 Thread Anshuman Khandual
On 12/01/2015 09:06 AM, Aneesh Kumar K.V wrote: > This free up 11 bits in pte_t. In the later patch we also change > the pte_t format so that we can start supporting migration pte > at pmd level. We now track 4k subpage valid bit as below > > If we have _PAGE_COMBO set, we override the _PAGE_F_GIX