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Wed, 14 Jun 2023 04:11:11 GMT Received: from smtpav03.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 73ABA5805C; Wed, 14 Jun 2023 04:11:11 +0000 (GMT) Received: from smtpav03.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B080558054; Wed, 14 Jun 2023 04:11:06 +0000 (GMT) Received: from skywalker.linux.ibm.com (unknown [9.43.10.53]) by smtpav03.wdc07v.mail.ibm.com (Postfix) with ESMTP; Wed, 14 Jun 2023 04:11:06 +0000 (GMT) X-Mailer: emacs 29.0.91 (via feedmail 11-beta-1 I) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org, npiggin@gmail.com, christophe.leroy@csgroup.eu Subject: Re: [PATCH 00/16] Add support for DAX vmemmap optimization for ppc64 In-Reply-To: <20230606045608.55127-1-aneesh.kumar@linux.ibm.com> References: <20230606045608.55127-1-aneesh.kumar@linux.ibm.com> Date: Wed, 14 Jun 2023 09:41:02 +0530 Message-ID: <87fs6u65ux.fsf@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ruuX-Zz0vE5wfoaRZI1RBaJ06ZaAEjKp X-Proofpoint-ORIG-GUID: ANs9AGt8YhxqOHyl226tXh2pwSWivLrt X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-14_01,2023-06-12_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 priorityscore=1501 suspectscore=0 impostorscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 bulkscore=0 clxscore=1015 mlxlogscore=884 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306140032 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Will Deacon , Muchun Song , Catalin Marinas , Dan Williams , Oscar Salvador , linuxppc-dev@lists.ozlabs.org, Joao Martins , Mike Kravetz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" "Aneesh Kumar K.V" writes: > This patch series implements changes required to support DAX vmemmap > optimization for ppc64. The vmemmap optimization is only enabled with radix MMU > translation and 1GB PUD mapping with 64K page size. The patch series also split > hugetlb vmemmap optimization as a separate Kconfig variable so that > architectures can enable DAX vmemmap optimization without enabling hugetlb > vmemmap optimization. This should enable architectures like arm64 to enable DAX > vmemmap optimization while they can't enable hugetlb vmemmap optimization. More > details of the same are in patch "mm/vmemmap optimization: Split hugetlb and > d > > Aneesh Kumar K.V (16): > powerpc/mm/book3s64: Use pmdp_ptep helper instead of typecasting. > powerpc/book3s64/mm: mmu_vmemmap_psize is used by radix > powerpc/book3s64/mm: Fix DirectMap stats in /proc/meminfo > powerpc/book3s64/mm: Use PAGE_KERNEL instead of opencoding > powerpc/mm/dax: Fix the condition when checking if altmap vmemap can > cross-boundary > mm/hugepage pud: Allow arch-specific helper function to check huge > page pud support > mm: Change pudp_huge_get_and_clear_full take vm_area_struct as arg > mm/vmemmap: Improve vmemmap_can_optimize and allow architectures to > override > mm/vmemmap: Allow architectures to override how vmemmap optimization > works > mm: Add __HAVE_ARCH_PUD_SAME similar to __HAVE_ARCH_P4D_SAME > mm/huge pud: Use transparent huge pud helpers only with > CONFIG_TRANSPARENT_HUGEPAGE > mm/vmemmap optimization: Split hugetlb and devdax vmemmap optimization > powerpc/book3s64/mm: Enable transparent pud hugepage > powerpc/book3s64/vmemmap: Switch radix to use a different vmemmap > handling function > powerpc/book3s64/radix: Add support for vmemmap optimization for radix > powerpc/book3s64/radix: Remove mmu_vmemmap_psize Gentle ping. Any objections for this series? -aneesh