From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> To: Dan Williams <dan.j.williams@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au>, linux-nvdimm <linux-nvdimm@lists.01.org>, linuxppc-dev <linuxppc-dev@lists.ozlabs.org> Subject: Re: [RFC PATCH 1/4] libnvdimm/namespace: Make namespace size validation arch dependent Date: Thu, 31 Oct 2019 14:07:49 +0530 [thread overview] Message-ID: <8e29b94c-cb82-2632-965c-567d26791f76@linux.ibm.com> (raw) In-Reply-To: <CAPcyv4h42_1deZDaaW1RqX0Ls+maiFO_1e=6xJuHTa3wdWvVvA@mail.gmail.com> On 10/31/19 12:00 PM, Dan Williams wrote: > On Wed, Oct 30, 2019 at 10:35 PM Aneesh Kumar K.V > <aneesh.kumar@linux.ibm.com> wrote: > [..] > > > All that said, the x86 vmemmap_populate() falls back to use small > pages in some case to get around this constraint. Can't powerpc do the > same? It would seem to be less work than the above proposal. > ppc64 supports two translation mode (radix and hash). We can do the above with radix translation. With hash we use just one page size( in this specific case 16MB) for direct-map mapping. -aneesh _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org
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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> To: Dan Williams <dan.j.williams@intel.com> Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, linux-nvdimm <linux-nvdimm@lists.01.org> Subject: Re: [RFC PATCH 1/4] libnvdimm/namespace: Make namespace size validation arch dependent Date: Thu, 31 Oct 2019 14:07:49 +0530 [thread overview] Message-ID: <8e29b94c-cb82-2632-965c-567d26791f76@linux.ibm.com> (raw) In-Reply-To: <CAPcyv4h42_1deZDaaW1RqX0Ls+maiFO_1e=6xJuHTa3wdWvVvA@mail.gmail.com> On 10/31/19 12:00 PM, Dan Williams wrote: > On Wed, Oct 30, 2019 at 10:35 PM Aneesh Kumar K.V > <aneesh.kumar@linux.ibm.com> wrote: > [..] > > > All that said, the x86 vmemmap_populate() falls back to use small > pages in some case to get around this constraint. Can't powerpc do the > same? It would seem to be less work than the above proposal. > ppc64 supports two translation mode (radix and hash). We can do the above with radix translation. With hash we use just one page size( in this specific case 16MB) for direct-map mapping. -aneesh
next prev parent reply other threads:[~2019-10-31 8:38 UTC|newest] Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-28 9:48 [RFC PATCH 1/4] libnvdimm/namespace: Make namespace size validation arch dependent Aneesh Kumar K.V 2019-10-28 9:48 ` Aneesh Kumar K.V 2019-10-28 9:48 ` [RFC PATCH 2/4] libnvdimm/namespace: Disable the region if the namespace size is not aligned correctly Aneesh Kumar K.V 2019-10-28 9:48 ` Aneesh Kumar K.V 2019-10-30 9:12 ` kbuild test robot 2019-10-28 9:48 ` [RFC PATCH 3/4] libnvdimm/namespace: Use direct-mapping page size to validate namespace size Aneesh Kumar K.V 2019-10-28 9:48 ` Aneesh Kumar K.V 2019-10-28 9:48 ` [RFC PATCH 4/4] libnvdimm/namespace: Add debug check while initializing namespace resource size Aneesh Kumar K.V 2019-10-28 9:48 ` Aneesh Kumar K.V 2019-10-28 21:21 ` [RFC PATCH 1/4] libnvdimm/namespace: Make namespace size validation arch dependent Ira Weiny 2019-10-28 21:21 ` Ira Weiny 2019-10-29 4:34 ` Aneesh Kumar K.V 2019-10-29 4:34 ` Aneesh Kumar K.V 2019-10-28 23:08 ` Dan Williams 2019-10-28 23:08 ` Dan Williams 2019-10-29 4:34 ` Aneesh Kumar K.V 2019-10-29 4:34 ` Aneesh Kumar K.V 2019-10-29 5:30 ` Dan Williams 2019-10-29 5:30 ` Dan Williams 2019-10-31 5:35 ` Aneesh Kumar K.V 2019-10-31 5:35 ` Aneesh Kumar K.V 2019-10-31 6:30 ` Dan Williams 2019-10-31 6:30 ` Dan Williams 2019-10-31 8:37 ` Aneesh Kumar K.V [this message] 2019-10-31 8:37 ` Aneesh Kumar K.V 2019-10-31 15:53 ` Dan Williams 2019-10-31 15:53 ` Dan Williams 2019-11-06 10:44 ` Aneesh Kumar K.V 2019-11-06 10:44 ` Aneesh Kumar K.V 2019-11-16 12:15 ` Aneesh Kumar K.V 2019-11-16 12:15 ` Aneesh Kumar K.V 2019-11-16 18:50 ` Dan Williams 2019-11-16 18:50 ` Dan Williams 2019-11-18 9:51 ` Aneesh Kumar K.V 2019-11-18 9:51 ` Aneesh Kumar K.V 2019-11-19 17:58 ` Dan Williams 2019-11-19 17:58 ` Dan Williams 2019-11-20 3:19 ` Aneesh Kumar K.V 2019-11-20 3:19 ` Aneesh Kumar K.V 2019-11-20 3:46 ` Dan Williams 2019-11-20 3:46 ` Dan Williams
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