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Fri, 7 Mar 2025 15:28:20 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4BC592004D; Fri, 7 Mar 2025 15:28:20 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6CBC420040; Fri, 7 Mar 2025 15:28:17 +0000 (GMT) Received: from osiris (unknown [9.171.2.237]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTPS; Fri, 7 Mar 2025 15:28:17 +0000 (GMT) Date: Fri, 7 Mar 2025 16:28:15 +0100 From: Heiko Carstens To: Mike Rapoport Cc: Andrew Morton , Alexander Gordeev , Andreas Larsson , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Brian Cain , Catalin Marinas , Dave Hansen , "David S. Miller" , Dinh Nguyen , Geert Uytterhoeven , Gerald Schaefer , Guo Ren , Helge Deller , Huacai Chen , Ingo Molnar , Jiaxun Yang , Johannes Berg , John Paul Adrian Glaubitz , Madhavan Srinivasan , Matt Turner , Max Filippov , Michael Ellerman , Michal Simek , Palmer Dabbelt , Peter Zijlstra , Richard Weinberger , Russell King , Stafford Horne , Thomas Bogendoerfer , Thomas Gleixner , Vasily Gorbik , Vineet Gupta , Will Deacon , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org Subject: Re: [PATCH 07/13] s390: make setup_zero_pages() use memblock Message-ID: <20250307152815.9880Gbd-hca@linux.ibm.com> References: <20250306185124.3147510-1-rppt@kernel.org> <20250306185124.3147510-8-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250306185124.3147510-8-rppt@kernel.org> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: A6EZhWyKm6a7TATSJL5pnfOrX3P29DY0 X-Proofpoint-GUID: Cc95RTw9axkwgZElLQM4IM54NfQR-ck- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-07_06,2025-03-06_04,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 bulkscore=0 clxscore=1011 spamscore=0 mlxlogscore=334 malwarescore=0 lowpriorityscore=0 phishscore=0 adultscore=0 suspectscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503070115 X-Rspam-User: X-Rspamd-Queue-Id: A9D1C20014 X-Rspamd-Server: rspam09 X-Stat-Signature: jfegqeco551comwxnmwbym358mpfbfqj X-HE-Tag: 1741361335-607240 X-HE-Meta: U2FsdGVkX1+Sj9uDkGt3mluAeLHKlnQ0N+yN8UPnDloSch62sxvJ5bZ1j9hptyH0dZKsIWwWJeZKARa5aO4UEWdRdXuzpv1vrDlq+ubRUwDxBBmjIIO5uM++jFHKxJ3n9MF6KNzbI+bWrtyZmbJQOJK2TRRBePwyzb/+QPh/FrXLGOK3dJcnA99LtL4ngBJLmsJW0bISCUEIN8EPS6vxD8EJ0Xerc4y+SQfYBvZ/+bYuZimyWycq79rf9aDNKSeFbMRf6FT3Lh26N+7hLSpX4Dc2rSOinGRb+2F1Yxq1MZ2//1dyJbW8hbQyOXmQlAg4E3URtmDd/o0Iyf5OcBSDFR1jEex+3RQtJzRMqft+GrSd6iN1jbbTJ1wZ5J1zenFk35B5W5rB4PoGqHDmtQall6mUI6dQNoCmGsnliheZSzX4z+UHSWNXkUkplLeVxU09tzVafQmhSsNn++xEtyLVm3OO7HMCH1LPfNEinCA/UUvkwFJ5hneFajhF0Tlzcf9cKifD/BoJKOjqPuQJwgomZmRYxsqpcfB38mif0nc5HAfOVa/B+Vn3LVtDSl+sDtJBoSZi/ztWz0h98JNMOQUqlkLbDBd8jiOj0e2297DImbQjJ9/+LcYuEOAM+XzgLUvPJxIMdPqgvZq3mM6bMnwv75jSSk4Sr0yyH7FYB3qzv82JymVImiQDsNms9RgPHF8UfxHij+feHTNT4+QbCSeiF5OybqohyQFmhMHmbXF2pDg1SleXUMsF4LKM5VB6HgrTx4K/2vrzr1pi13OYeOxEQol9JOidlqTKX8F2RKKyy0ZnJgZhTglGaZRAlfsjcXxoB/tWvz2C36/aEgCGk7xZsFkdCSieIZK6xftg/Kgfy5wodRJiNtdzJZ0iDJDEx5SPqltns4gqvNaERop9+VW2gUL5vzyRDFx29Z/Y/A6pE9CUbVoawl6TQie4GbckNxUwd6wXtzw/ukfXsHRLTYe /2Dtg7Yf USLVYDJFSSN6EofI0Q6zZ8Zyl+AWs2qRg93AYZ4YwEXo5iw7mqK0cPWfHoKhgLv1f1EWqCopdEy8UhqlUXt/tJb6Uzh/fNgjYOyhibO6fWL9Vw7RrXs/b0uZLKfRvcD/icfAJjS2cXlZ2q+CyBoRU+BNqGPTfLLNv3I1fBV0+ykUtC3ZsqbedD7B44J3bD1olGqff1EE0Izk82Ag63wm2sa13vWp0DK5xj9KZiaE7ft9gjUKuIn2eOnB1Oa1dhHq7TRO1yGLdqulH6PfJOc6mbfIpBYa08oTyAGZIF1afCqWzvGxX0QSY7XjC0skH7oAQtEi/ 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: List-Subscribe: List-Unsubscribe: On Thu, Mar 06, 2025 at 08:51:17PM +0200, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > Allocating the zero pages from memblock is simpler because the memory is > already reserved. > > This will also help with pulling out memblock_free_all() to the generic > code and reducing code duplication in arch::mem_init(). > > Signed-off-by: Mike Rapoport (Microsoft) > --- > arch/s390/mm/init.c | 14 +++----------- > 1 file changed, 3 insertions(+), 11 deletions(-) Acked-by: Heiko Carstens > - empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order); > + empty_zero_page = (unsigned long)memblock_alloc(PAGE_SIZE << order, order); > if (!empty_zero_page) > panic("Out of memory in setup_zero_pages"); This could have been converted to memblock_alloc_or_panic(), but I guess this can also be done at a later point in time.