From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) by kanga.kvack.org (Postfix) with ESMTP id 31CAB8E00DF for ; Fri, 25 Jan 2019 12:45:15 -0500 (EST) Received: by mail-ed1-f71.google.com with SMTP id o21so4026891edq.4 for ; Fri, 25 Jan 2019 09:45:15 -0800 (PST) Received: from foss.arm.com (foss.arm.com. [217.140.101.70]) by mx.google.com with ESMTP id t14-v6si7626570ejf.152.2019.01.25.09.45.13 for ; Fri, 25 Jan 2019 09:45:13 -0800 (PST) Date: Fri, 25 Jan 2019 17:45:02 +0000 From: Catalin Marinas Subject: Re: [PATCH v2 06/21] memblock: memblock_phys_alloc_try_nid(): don't panic Message-ID: <20190125174502.GL25901@arrakis.emea.arm.com> References: <1548057848-15136-1-git-send-email-rppt@linux.ibm.com> <1548057848-15136-7-git-send-email-rppt@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1548057848-15136-7-git-send-email-rppt@linux.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Mike Rapoport Cc: linux-mm@kvack.org, Andrew Morton , Christoph Hellwig , "David S. Miller" , Dennis Zhou , Geert Uytterhoeven , Greentime Hu , Greg Kroah-Hartman , Guan Xuetao , Guo Ren , Heiko Carstens , Mark Salter , Matt Turner , Max Filippov , Michael Ellerman , Michal Simek , Paul Burton , Petr Mladek , Rich Felker , Richard Weinberger , Rob Herring , Russell King , Stafford Horne , Tony Luck , Vineet Gupta , Yoshinori Sato , devicetree@vger.kernel.org, kasan-dev@googlegroups.com, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, linux-usb@vger.kernel.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, openrisc@lists.librecores.org, sparclinux@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, x86@kernel.org, xen-devel@lists.xenproject.org On Mon, Jan 21, 2019 at 10:03:53AM +0200, Mike Rapoport wrote: > diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c > index ae34e3a..2c61ea4 100644 > --- a/arch/arm64/mm/numa.c > +++ b/arch/arm64/mm/numa.c > @@ -237,6 +237,10 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn) > pr_info("Initmem setup node %d []\n", nid); > > nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid); > + if (!nd_pa) > + panic("Cannot allocate %zu bytes for node %d data\n", > + nd_size, nid); > + > nd = __va(nd_pa); > > /* report and initialize */ Does it mean that memblock_phys_alloc_try_nid() never returns valid physical memory starting at 0? -- Catalin