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Fri, 17 Apr 2020 18:53:11 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 03HIcJ0Z118535; Fri, 17 Apr 2020 18:51:10 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserp3020.oracle.com with ESMTP id 30dn9ks84n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 17 Apr 2020 18:51:10 +0000 Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 03HIotrG025242; Fri, 17 Apr 2020 18:50:55 GMT Received: from monkey.oracle.com (/71.63.128.209) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 17 Apr 2020 11:50:55 -0700 From: Mike Kravetz To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3 0/4] Clean up hugetlb boot command line processing Date: Fri, 17 Apr 2020 11:50:45 -0700 Message-Id: <20200417185049.275845-1-mike.kravetz@oracle.com> X-Mailer: git-send-email 2.25.2 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9594 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 mlxscore=0 adultscore=0 spamscore=0 phishscore=0 bulkscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004170142 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9594 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 clxscore=1015 impostorscore=0 mlxlogscore=999 mlxscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 spamscore=0 malwarescore=0 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004170142 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200417_115345_632490_87C3AB72 X-CRM114-Status: GOOD ( 17.55 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [156.151.31.86 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Benjamin Herrenschmidt , Dave Hansen , Heiko Carstens , Peter Xu , Paul Mackerras , Will Deacon , Mina Almasry , Jonathan Corbet , Christian Borntraeger , Ingo Molnar , Catalin Marinas , Longpeng , Albert Ou , Vasily Gorbik , Paul Walmsley , Thomas Gleixner , Christophe Leroy , Nitesh Narayan Lal , Randy Dunlap , Palmer Dabbelt , Andrew Morton , "David S . Miller" , Mike Kravetz Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org v3 - Used weak attribute method of defining arch_hugetlb_valid_size. This eliminates changes to arch specific hugetlb.h files (Peter) Updated documentation (Peter, Randy) Fixed handling of implicitly specified gigantic page preallocation in existing code and removed documentation of such. There is now no difference between handling of gigantic and non-gigantic pages. (Peter, Nitesh). This requires the most review as there is a small change to undocumented behavior. See patch 4 commit message for details. Added Acks and Reviews (Mina, Peter) v2 - Fix build errors with patch 1 (Will) Change arch_hugetlb_valid_size arg to unsigned long and remove irrelevant 'extern' keyword (Christophe) Documentation and other misc changes (Randy, Christophe, Mina) Do not process command line options if !hugepages_supported() (Dave, but it sounds like we may want to additional changes to hugepages_supported() for x86? If that is needed I would prefer a separate patch.) Longpeng(Mike) reported a weird message from hugetlb command line processing and proposed a solution [1]. While the proposed patch does address the specific issue, there are other related issues in command line processing. As hugetlbfs evolved, updates to command line processing have been made to meet immediate needs and not necessarily in a coordinated manner. The result is that some processing is done in arch specific code, some is done in arch independent code and coordination is problematic. Semantics can vary between architectures. The patch series does the following: - Define arch specific arch_hugetlb_valid_size routine used to validate passed huge page sizes. - Move hugepagesz= command line parsing out of arch specific code and into an arch independent routine. - Clean up command line processing to follow desired semantics and document those semantics. [1] https://lore.kernel.org/linux-mm/20200305033014.1152-1-longpeng2@huawei.com Mike Kravetz (4): hugetlbfs: add arch_hugetlb_valid_size hugetlbfs: move hugepagesz= parsing to arch independent code hugetlbfs: remove hugetlb_add_hstate() warning for existing hstate hugetlbfs: clean up command line processing .../admin-guide/kernel-parameters.txt | 40 ++-- Documentation/admin-guide/mm/hugetlbpage.rst | 35 ++++ arch/arm64/mm/hugetlbpage.c | 30 +-- arch/powerpc/mm/hugetlbpage.c | 30 +-- arch/riscv/mm/hugetlbpage.c | 24 +-- arch/s390/mm/hugetlbpage.c | 24 +-- arch/sparc/mm/init_64.c | 43 +--- arch/x86/mm/hugetlbpage.c | 23 +-- include/linux/hugetlb.h | 2 +- mm/hugetlb.c | 190 +++++++++++++++--- 10 files changed, 271 insertions(+), 170 deletions(-) Signed-off-by: Mike Kravetz Signed-off-by: Mike Kravetz Tested-by: Anders Roxell Acked-by: Will Deacon Acked-by: Gerald Schaefer # s390