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Wed, 30 Oct 2024 09:30:24 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E18CF20043; Wed, 30 Oct 2024 09:30:23 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2FA7420040; Wed, 30 Oct 2024 09:30:21 +0000 (GMT) Received: from osiris (unknown [9.152.212.60]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTPS; Wed, 30 Oct 2024 09:30:21 +0000 (GMT) Date: Wed, 30 Oct 2024 10:30:17 +0100 From: Heiko Carstens To: David Hildenbrand Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, virtualization@lists.linux.dev, linux-doc@vger.kernel.org, kvm@vger.kernel.org, Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Huth , Cornelia Huck , Janosch Frank , Claudio Imbrenda , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , Eugenio =?iso-8859-1?Q?P=E9rez?= , Eric Farman , Andrew Morton , Jonathan Corbet Subject: Re: [PATCH v3 7/7] s390/sparsemem: provide memory_add_physaddr_to_nid() with CONFIG_NUMA Message-ID: <20241030093017.6264-G-hca@linux.ibm.com> References: <20241025141453.1210600-1-david@redhat.com> <20241025141453.1210600-8-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241025141453.1210600-8-david@redhat.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: KANImo9SxKQni0nP7uMhU3bAxJm1G1xZ X-Proofpoint-GUID: h1PsrlS2Uz19eKGx8RjTRA0zXxFEnG3d X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 bulkscore=0 mlxlogscore=758 clxscore=1015 priorityscore=1501 suspectscore=0 lowpriorityscore=0 mlxscore=0 impostorscore=0 malwarescore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2410300072 X-Rspam-User: X-Stat-Signature: 8734mo7k1ywn6mooaxbk98xjh9h9g9hs X-Rspamd-Queue-Id: 950B740006 X-Rspamd-Server: rspam02 X-HE-Tag: 1730280595-315848 X-HE-Meta: U2FsdGVkX19H0vDrMqebCsE3BxOUYH3qWSVxHy6FwIem3ypPi0X2B7yxA7Dl87rYoyhXuDpMMOW4FePfy6Y3E9ll68JfdCbVXViK71CT0iykbwpeLVGqAAxEC6G0IoDD1h4l7bPBiv7br++uJ1hU11BWpFYObz5dn2qGcv5JrIJN4PEr2yXdqZgL/+mXi4X9UN1YyXnBZSeGEVOol4Uq0RKQv0/+ANP9Hq3jneNlHQuIPo0lsiwR/fjt7FHAz4daVjm32AZWgX7MRXzwXl9Uc3ConXvoxMV6zIq/a64balULEUrgzrpTYLpR6MBaDf0De4qPowCIPStTNeCQgSCYA77LVHY8rzTQLUSNGU1+vQHPaKiHu4/oCjFRRNzrJhRZ55Ryz3W1Ca2M4NWYnLcQ9vdZOm0449RJ34J11+sGoUgem5qe5/92WFM13OrmQbmaBDsfyJR0Y635IalB0PHtpzcerFlgHLZ/MnJJb1brBFri8AIHXMrPXv/mbCfH2hBSrnBHdQdxQ05ZnC/12tzrp/o4oNEPP1L96LNzd0Ce2OPNUjAOiEdW6QaJgW6VxTMFJn4nYUqkKwIsFJTXZO01OBJpK9qQ4KPEM+61XinA1bdBJIMw/LuoYJhD6RxJjprW2pWca1U09Ak4vkzPLEbVHRyVWS99Qu1c/z6MRA2+CYdtxrwbpqYeZMjLZOc3lB6ST8p+PuuXIw9rlDHe6RyF7nFbP6t4XY4XjcSST89H2z2yCc1S0dRDOZJpBwIFEGCVpjYFCW7zq+DPIvsggmSmv/Fzp9InRfrvaSU8La2gluT+1/Q5z+58FveeQZTNqyU4c0siUgIo/aE38tN5MovNt/6lZ6XZsyizrRhrkNDAU5/mh0BYzkOuM4zFLeNAtlq1qSd2TOwde3rE7GTjuP3k6SzpxJHAR/H3lQqlLWuHxBAMwg+qsKtQAksUATF2Wy7N5dyL4gGmv7UUyvTPaaE 6K2vfuqJ eYYzrw2REERK/9yeyVaPf2J4rIBH8qTj5oG2Tu2BvEUVTvivwRU/6MJQrEv5Hs9v1dQy/yT5h68MAdMwSS0JJ4l2IlBzSIC5U6x+TA0bCqH+M8ltUS/ufuWfPAro4LAXopY/yeyaSQTWxfJrNc4l9JngfFxn0i6v5y6CthgW/Nx4T5HLsrMXD1V9PI2uommk2JJEJn/Is058gvKzgDcJoCcf0tOKJ4HMviC3nNK/2ykStQzKC0lHlhQXBKbskyrhMijdrGe46iDPNkX6VQp8Vcq4LN4XEmaEmLGxzLwAzPHVi5wXi2V9QdBFThHv5yMyNavwQ 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 Fri, Oct 25, 2024 at 04:14:52PM +0200, David Hildenbrand wrote: > virtio-mem uses memory_add_physaddr_to_nid() to determine the NID to use > for memory it adds. > > We currently fallback to the dummy implementation in mm/numa.c with > CONFIG_NUMA, which will end up triggering an undesired pr_info_once(): > > Unknown online node for memory at 0x100000000, assuming node 0 > > On s390, we map all cpus and memory to node 0, so let's add a simple > memory_add_physaddr_to_nid() implementation that does exactly that, > but without complaining. > > Signed-off-by: David Hildenbrand > --- > arch/s390/include/asm/sparsemem.h | 8 ++++++++ > 1 file changed, 8 insertions(+) ... > diff --git a/arch/s390/include/asm/sparsemem.h b/arch/s390/include/asm/sparsemem.h > index ff628c50afac..6377b7ea8a40 100644 > --- a/arch/s390/include/asm/sparsemem.h > +++ b/arch/s390/include/asm/sparsemem.h > @@ -5,4 +5,12 @@ > #define SECTION_SIZE_BITS 27 > #define MAX_PHYSMEM_BITS CONFIG_MAX_PHYSMEM_BITS > > +#ifdef CONFIG_NUMA > +static inline int memory_add_physaddr_to_nid(u64 addr) > +{ > + return 0; > +} > +#define memory_add_physaddr_to_nid memory_add_physaddr_to_nid > +#endif /* CONFIG_NUMA */ > + We would need to have the same for phys_to_target_node(), even though it looks like this won't be used on s390 currently. Anyway, I'll add that, if I don't forget about it :) For this patch: Reviewed-by: Heiko Carstens