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Mon, 24 May 2021 09:02:04 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7AAFFAE05F; Mon, 24 May 2021 09:02:01 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.102.1.240]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Mon, 24 May 2021 09:02:01 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Subject: [PATCH v6 11/11] powerpc/mm: Enable HAVE_MOVE_PMD support Date: Mon, 24 May 2021 14:31:14 +0530 Message-Id: <20210524090114.63446-12-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210524090114.63446-1-aneesh.kumar@linux.ibm.com> References: <20210524090114.63446-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: slDP34Vz9pXpZQXlxK0uNdvrwmP5FI7I X-Proofpoint-ORIG-GUID: J-CDkGc8EAUKsukwOF9NQkdCLLAJr7NE X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-05-24_04:2021-05-20, 2021-05-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 impostorscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 mlxscore=0 clxscore=1015 spamscore=0 phishscore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2105240067 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: "Aneesh Kumar K.V" , Linus Torvalds , npiggin@gmail.com, kaleshsingh@google.com, joel@joelfernandes.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" mremap HAVE_MOVE_PMD/PUD optimization time comparison for 1GB region: 1GB mremap - Source PTE-aligned, Destination PTE-aligned mremap time: 1122062ns 1GB mremap - Source PMD-aligned, Destination PMD-aligned mremap time: 522062ns 1GB mremap - Source PUD-aligned, Destination PUD-aligned mremap time: 523345ns There is not much impact with HAVE_MOVE_PUD because the kernel by default enables USE_SPLIT_PTE_PTLOCKS. That results in the optimized pud move being disabled. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/platforms/Kconfig.cputype | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 3ce907523b1e..2e666e569fdf 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -97,6 +97,8 @@ config PPC_BOOK3S_64 select PPC_HAVE_PMU_SUPPORT select SYS_SUPPORTS_HUGETLBFS select HAVE_ARCH_TRANSPARENT_HUGEPAGE + select HAVE_MOVE_PMD + select HAVE_MOVE_PUD select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE select ARCH_SUPPORTS_NUMA_BALANCING select IRQ_WORK -- 2.31.1