From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965061AbeBMOY0 (ORCPT ); Tue, 13 Feb 2018 09:24:26 -0500 Received: from 9pmail.ess.barracuda.com ([64.235.154.210]:46150 "EHLO 9pmail.ess.barracuda.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964950AbeBMOYX (ORCPT ); Tue, 13 Feb 2018 09:24:23 -0500 Subject: Re: [PATCH v2 14/15] MIPS: memblock: Discard bootmem from SGI IP27 code To: Serge Semin , , , , , , , , , CC: , , , , , , , References: <20180117222312.14763-1-fancer.lancer@gmail.com> <20180202035458.30456-1-fancer.lancer@gmail.com> <20180202035458.30456-15-fancer.lancer@gmail.com> From: Matt Redfearn Message-ID: <4de8dba6-64bb-599f-c67e-e6fb97db87de@mips.com> Date: Tue, 13 Feb 2018 14:17:21 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: <20180202035458.30456-15-fancer.lancer@gmail.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.150.130.83] X-BESS-ID: 1518531768-321458-10267-39691-6 X-BESS-VER: 2018.1-r1801291959 X-BESS-Apparent-Source-IP: 12.201.5.28 X-BESS-Outbound-Spam-Score: 0.00 X-BESS-Outbound-Spam-Report: Code version 3.2, rules version 3.2.2.189978 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------- 0.00 BSF_BESS_OUTBOUND META: BESS Outbound X-BESS-Outbound-Spam-Status: SCORE=0.00 using account:ESS59374 scores of KILL_LEVEL=7.0 tests=BSF_BESS_OUTBOUND X-BESS-BRTS-Status: 1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Serge, On 02/02/18 03:54, Serge Semin wrote: > SGI IP27 got its own code to set the early memory allocator up since it's > NUMA-based system. So in order to be compatible with NO_BOOTMEM config > we need to discard the bootmem allocator initialization and insert the > memblock reservation method. Although in my opinion the code isn't > working anyway since I couldn't find a place where prom_meminit() called > and kernel memory isn't reserved. It must have been untested since the > time the arch/mips/mips-boards/generic code was in the kernel. I don't have access to an IP27, but the change looks sensible to me. Reviewed-by: Matt Redfearn > > Signed-off-by: Serge Semin > --- > arch/mips/sgi-ip27/ip27-memory.c | 9 ++------- > 1 file changed, 2 insertions(+), 7 deletions(-) > > diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c > index 59133d0abc83..c480ee3eca96 100644 > --- a/arch/mips/sgi-ip27/ip27-memory.c > +++ b/arch/mips/sgi-ip27/ip27-memory.c > @@ -389,7 +389,6 @@ static void __init node_mem_init(cnodeid_t node) > { > unsigned long slot_firstpfn = slot_getbasepfn(node, 0); > unsigned long slot_freepfn = node_getfirstfree(node); > - unsigned long bootmap_size; > unsigned long start_pfn, end_pfn; > > get_pfn_range_for_nid(node, &start_pfn, &end_pfn); > @@ -400,7 +399,6 @@ static void __init node_mem_init(cnodeid_t node) > __node_data[node] = __va(slot_freepfn << PAGE_SHIFT); > memset(__node_data[node], 0, PAGE_SIZE); > > - NODE_DATA(node)->bdata = &bootmem_node_data[node]; > NODE_DATA(node)->node_start_pfn = start_pfn; > NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn; > > @@ -409,12 +407,9 @@ static void __init node_mem_init(cnodeid_t node) > slot_freepfn += PFN_UP(sizeof(struct pglist_data) + > sizeof(struct hub_data)); > > - bootmap_size = init_bootmem_node(NODE_DATA(node), slot_freepfn, > - start_pfn, end_pfn); > free_bootmem_with_active_regions(node, end_pfn); > - reserve_bootmem_node(NODE_DATA(node), slot_firstpfn << PAGE_SHIFT, > - ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT) + bootmap_size, > - BOOTMEM_DEFAULT); > + memblock_reserve(slot_firstpfn << PAGE_SHIFT, > + ((slot_freepfn - slot_firstpfn) << PAGE_SHIFT)); How about PFN_PHYS()? In fact, that could be used throughout the series to tidy up some of the shifting by PAGE_SIZE. Thanks, Matt > sparse_memory_present_with_active_regions(node); > } > >