Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page

On Tue, 27 Jun 2023, Jason Gunthorpe wrote: > On Wed, Jun 21, 2023 at 07:36:11PM -0700, Hugh Dickins wrote: > > [PATCH v3 05/12] powerpc: add pte_free_defer() for pgtables sharing page ... > Yes, this makes sense to me, very simple.. > > I always for get these details but atomic_dec_and_test() is

Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page

On Wed, Jun 21, 2023 at 07:36:11PM -0700, Hugh Dickins wrote: > [PATCH v3 05/12] powerpc: add pte_free_defer() for pgtables sharing page > > Add powerpc-specific pte_free_defer(), to free table page via call_rcu(). > pte_free_defer() will be called inside khugepaged's retract_page_tables() >

Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page

On Tue, 20 Jun 2023, Jason Gunthorpe wrote: > On Tue, Jun 20, 2023 at 12:54:25PM -0700, Hugh Dickins wrote: > > On Tue, 20 Jun 2023, Jason Gunthorpe wrote: > > > On Tue, Jun 20, 2023 at 12:47:54AM -0700, Hugh Dickins wrote: > > > > Add powerpc-specific pte_free_defer(), to call pte_free() via > >

Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page

On Tue, Jun 20, 2023 at 12:54:25PM -0700, Hugh Dickins wrote: > On Tue, 20 Jun 2023, Jason Gunthorpe wrote: > > On Tue, Jun 20, 2023 at 12:47:54AM -0700, Hugh Dickins wrote: > > > Add powerpc-specific pte_free_defer(), to call pte_free() via call_rcu(). > > > pte_free_defer() will be called inside

Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page

On Tue, 20 Jun 2023, Jason Gunthorpe wrote: > On Tue, Jun 20, 2023 at 12:47:54AM -0700, Hugh Dickins wrote: > > Add powerpc-specific pte_free_defer(), to call pte_free() via call_rcu(). > > pte_free_defer() will be called inside khugepaged's retract_page_tables() > > loop, where allocating extra

Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page

On Tue, Jun 20, 2023 at 12:47:54AM -0700, Hugh Dickins wrote: > Add powerpc-specific pte_free_defer(), to call pte_free() via call_rcu(). > pte_free_defer() will be called inside khugepaged's retract_page_tables() > loop, where allocating extra memory cannot be relied upon. This precedes > the

[PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page

Add powerpc-specific pte_free_defer(), to call pte_free() via call_rcu(). pte_free_defer() will be called inside khugepaged's retract_page_tables() loop, where allocating extra memory cannot be relied upon. This precedes the generic version to avoid build breakage from incompatible pgtable_t.