Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

On Wed, Mar 20, 2024 at 05:40:39PM +, Christophe Leroy wrote: > > > Le 20/03/2024 à 17:09, Peter Xu a écrit : > > On Wed, Mar 20, 2024 at 06:16:43AM +, Christophe Leroy wrote: > >> At the first place that was to get a close fit between hardware > >> pagetable topology and linux pagetable

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

Le 20/03/2024 à 17:09, Peter Xu a écrit : > On Wed, Mar 20, 2024 at 06:16:43AM +, Christophe Leroy wrote: >> At the first place that was to get a close fit between hardware >> pagetable topology and linux pagetable topology. But obviously we >> already stepped back for 512k pages, so let's

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

On Wed, Mar 20, 2024 at 06:16:43AM +, Christophe Leroy wrote: > At the first place that was to get a close fit between hardware > pagetable topology and linux pagetable topology. But obviously we > already stepped back for 512k pages, so let's go one more step aside and > do similar with 8M

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

Le 20/03/2024 à 00:26, Jason Gunthorpe a écrit : > On Tue, Mar 19, 2024 at 11:07:08PM +, Christophe Leroy wrote: >> >> >> Le 18/03/2024 à 17:15, Jason Gunthorpe a écrit : >>> On Thu, Mar 14, 2024 at 01:11:59PM +, Christophe Leroy wrote: Le 14/03/2024 à 13:53, Peter Xu a

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

On Tue, Mar 19, 2024 at 11:07:08PM +, Christophe Leroy wrote: > > > Le 18/03/2024 à 17:15, Jason Gunthorpe a écrit : > > On Thu, Mar 14, 2024 at 01:11:59PM +, Christophe Leroy wrote: > >> > >> > >> Le 14/03/2024 à 13:53, Peter Xu a écrit : > >>> On Thu, Mar 14, 2024 at 08:45:34AM +,

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

Le 18/03/2024 à 17:15, Jason Gunthorpe a écrit : > On Thu, Mar 14, 2024 at 01:11:59PM +, Christophe Leroy wrote: >> >> >> Le 14/03/2024 à 13:53, Peter Xu a écrit : >>> On Thu, Mar 14, 2024 at 08:45:34AM +, Christophe Leroy wrote: Le 13/03/2024 à 22:47, pet...@redhat.com a

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

On Thu, Mar 14, 2024 at 01:11:59PM +, Christophe Leroy wrote: > > > Le 14/03/2024 à 13:53, Peter Xu a écrit : > > On Thu, Mar 14, 2024 at 08:45:34AM +, Christophe Leroy wrote: > >> > >> > >> Le 13/03/2024 à 22:47, pet...@redhat.com a écrit : > >>> From: Peter Xu > >>> > >>> PowerPC

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

Le 14/03/2024 à 13:53, Peter Xu a écrit : > On Thu, Mar 14, 2024 at 08:45:34AM +, Christophe Leroy wrote: >> >> >> Le 13/03/2024 à 22:47, pet...@redhat.com a écrit : >>> From: Peter Xu >>> >>> PowerPC book3s 4K mostly has the same definition on both, except pXd_huge() >>> constantly returns

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

On Thu, Mar 14, 2024 at 08:45:34AM +, Christophe Leroy wrote: > > > Le 13/03/2024 à 22:47, pet...@redhat.com a écrit : > > From: Peter Xu > > > > PowerPC book3s 4K mostly has the same definition on both, except pXd_huge() > > constantly returns 0 for hash MMUs. As Michael Ellerman pointed

Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

Le 13/03/2024 à 22:47, pet...@redhat.com a écrit : > From: Peter Xu > > PowerPC book3s 4K mostly has the same definition on both, except pXd_huge() > constantly returns 0 for hash MMUs. As Michael Ellerman pointed out [1], > it is safe to check _PAGE_PTE on hash MMUs, as the bit will never be

[PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()

From: Peter Xu PowerPC book3s 4K mostly has the same definition on both, except pXd_huge() constantly returns 0 for hash MMUs. As Michael Ellerman pointed out [1], it is safe to check _PAGE_PTE on hash MMUs, as the bit will never be set so it will keep returning false. As a reference,