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Mon, 14 Jun 2021 13:23:58 +0000 (GMT) Received: from ibm-vm.ibmuc.com (unknown [9.145.5.73]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id F18F65204E; Mon, 14 Jun 2021 13:23:57 +0000 (GMT) From: Claudio Imbrenda To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, frankja@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, david@redhat.com, linux-mm@kvack.org, Andrew Morton , Nicholas Piggin , Uladzislau Rezki , Catalin Marinas , Thomas Gleixner , Ingo Molnar , David Rientjes , Christoph Hellwig Subject: [PATCH v4 0/2] mm: add vmalloc_no_huge and use it Date: Mon, 14 Jun 2021 15:23:55 +0200 Message-Id: <20210614132357.10202-1-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: f6LuAo1etUlBZ1PUEMEEyzesdKRCqQfk X-Proofpoint-GUID: uSO97Z_Tmc4NkHhim8c2LbWtvWR-aVVK X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-06-14_07:2021-06-14,2021-06-14 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 spamscore=0 mlxlogscore=522 impostorscore=0 suspectscore=0 clxscore=1015 mlxscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106140089 Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=hlRYDCKl; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf23.hostedemail.com: domain of imbrenda@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=imbrenda@linux.ibm.com X-Stat-Signature: sui4r7s1jqsznrpnggjjkhunih5udfe6 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 32E3FA000240 X-HE-Tag: 1623677053-396216 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add vmalloc_no_huge and export it, so modules can allocate memory with small pages. Use the newly added vmalloc_no_huge in KVM on s390 to get around a hardware limitation. v3->v4: * reword commit messages to be more clear * add comment in the second patch v2->v3: * do not export __vmalloc_node_range * add vmalloc_no_huge as a wrapper around __vmalloc_node_range * use vmalloc_no_huge instead of __vmalloc_node_range in kvm on s390x Cc: Andrew Morton Cc: Nicholas Piggin Cc: Uladzislau Rezki (Sony) Cc: Catalin Marinas Cc: Thomas Gleixner Cc: Ingo Molnar Cc: David Rientjes Cc: Christoph Hellwig Claudio Imbrenda (2): mm/vmalloc: add vmalloc_no_huge KVM: s390: prepare for hugepage vmalloc arch/s390/kvm/pv.c | 7 ++++++- include/linux/vmalloc.h | 1 + mm/vmalloc.c | 16 ++++++++++++++++ 3 files changed, 23 insertions(+), 1 deletion(-)