From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 28E05C433FE for ; Wed, 6 Oct 2021 00:36:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F0C161371 for ; Wed, 6 Oct 2021 00:36:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237129AbhJFAiF (ORCPT ); Tue, 5 Oct 2021 20:38:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:36928 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237120AbhJFAiE (ORCPT ); Tue, 5 Oct 2021 20:38:04 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 81C5A6128A; Wed, 6 Oct 2021 00:36:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1633480573; bh=PwxAnmAxNnW0LkORB3c3YnoJI9QyHleuU4SqQmtBdp8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=bP1h1gk9sPFJUm3xaK7uv59ir96gb6n13GYWINDE3fVKwKprjlXytBJ9jognAQWgW 9e+Wv1tMBX/zZyPhX95ld8QzYAgqqkCKYrRDu+0G6NMGRn6jrzaufxOXE9zVlLRrnF 9VTBo53jIveX7p+RlmPMJG14+lmQEx7G65GBi7dyH/bZ88Bj9DgpR8mdwrRu6A2U0f Je6MYYxh7x7SFKj3++qSshoF+0m13ywbg7CiX6WX9M3E3pCVJshV8tzhixl6g05sDD YOiTMqVbUKqxwDOdPpK6aoh7FhJiYFz5w2WI1e/lyxBiedKhsKhGJLfT8eqTJABsmy g1w9joe94EgwA== Date: Tue, 5 Oct 2021 17:36:09 -0700 From: Mike Rapoport To: David Hildenbrand Cc: linux-kernel@vger.kernel.org, Andrew Morton , Michal Hocko , Oscar Salvador , Jianyong Wu , "Aneesh Kumar K . V" , Vineet Gupta , Geert Uytterhoeven , Huacai Chen , Jiaxun Yang , Thomas Bogendoerfer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Eric Biederman , Arnd Bergmann , linux-snps-arc@lists.infradead.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-s390@vger.kernel.org, linux-mm@kvack.org, kexec@lists.infradead.org Subject: Re: [PATCH v2 3/5] memblock: allow to specify flags with memblock_add_node() Message-ID: References: <20211004093605.5830-1-david@redhat.com> <20211004093605.5830-4-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211004093605.5830-4-david@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On Mon, Oct 04, 2021 at 11:36:03AM +0200, David Hildenbrand wrote: > We want to specify flags when hotplugging memory. Let's prepare to pass > flags to memblock_add_node() by adjusting all existing users. > > Note that when hotplugging memory the system is already up and running > and we might have concurrent memblock users: for example, while we're > hotplugging memory, kexec_file code might search for suitable memory > regions to place kexec images. It's important to add the memory directly > to memblock via a single call with the right flags, instead of adding the > memory first and apply flags later: otherwise, concurrent memblock users > might temporarily stumble over memblocks with wrong flags, which will be > important in a follow-up patch that introduces a new flag to properly > handle add_memory_driver_managed(). > > Acked-by: Geert Uytterhoeven > Acked-by: Heiko Carstens > Signed-off-by: David Hildenbrand Reviewed-by: Mike Rapoport > --- > arch/arc/mm/init.c | 4 ++-- > arch/ia64/mm/contig.c | 2 +- > arch/ia64/mm/init.c | 2 +- > arch/m68k/mm/mcfmmu.c | 3 ++- > arch/m68k/mm/motorola.c | 6 ++++-- > arch/mips/loongson64/init.c | 4 +++- > arch/mips/sgi-ip27/ip27-memory.c | 3 ++- > arch/s390/kernel/setup.c | 3 ++- > include/linux/memblock.h | 3 ++- > include/linux/mm.h | 2 +- > mm/memblock.c | 9 +++++---- > mm/memory_hotplug.c | 2 +- > 12 files changed, 26 insertions(+), 17 deletions(-) > > diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c > index 699ecf119641..110eb69e9bee 100644 > --- a/arch/arc/mm/init.c > +++ b/arch/arc/mm/init.c > @@ -59,13 +59,13 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) > > low_mem_sz = size; > in_use = 1; > - memblock_add_node(base, size, 0); > + memblock_add_node(base, size, 0, MEMBLOCK_NONE); > } else { > #ifdef CONFIG_HIGHMEM > high_mem_start = base; > high_mem_sz = size; > in_use = 1; > - memblock_add_node(base, size, 1); > + memblock_add_node(base, size, 1, MEMBLOCK_NONE); > memblock_reserve(base, size); > #endif > } > diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c > index 42e025cfbd08..24901d809301 100644 > --- a/arch/ia64/mm/contig.c > +++ b/arch/ia64/mm/contig.c > @@ -153,7 +153,7 @@ find_memory (void) > efi_memmap_walk(find_max_min_low_pfn, NULL); > max_pfn = max_low_pfn; > > - memblock_add_node(0, PFN_PHYS(max_low_pfn), 0); > + memblock_add_node(0, PFN_PHYS(max_low_pfn), 0, MEMBLOCK_NONE); > > find_initrd(); > > diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c > index 5c6da8d83c1a..5d165607bf35 100644 > --- a/arch/ia64/mm/init.c > +++ b/arch/ia64/mm/init.c > @@ -378,7 +378,7 @@ int __init register_active_ranges(u64 start, u64 len, int nid) > #endif > > if (start < end) > - memblock_add_node(__pa(start), end - start, nid); > + memblock_add_node(__pa(start), end - start, nid, MEMBLOCK_NONE); > return 0; > } > > diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c > index eac9dde65193..6f1f25125294 100644 > --- a/arch/m68k/mm/mcfmmu.c > +++ b/arch/m68k/mm/mcfmmu.c > @@ -174,7 +174,8 @@ void __init cf_bootmem_alloc(void) > m68k_memory[0].addr = _rambase; > m68k_memory[0].size = _ramend - _rambase; > > - memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0); > + memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0, > + MEMBLOCK_NONE); > > /* compute total pages in system */ > num_pages = PFN_DOWN(_ramend - _rambase); > diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c > index 9f3f77785aa7..2b05bb2bac00 100644 > --- a/arch/m68k/mm/motorola.c > +++ b/arch/m68k/mm/motorola.c > @@ -410,7 +410,8 @@ void __init paging_init(void) > > min_addr = m68k_memory[0].addr; > max_addr = min_addr + m68k_memory[0].size; > - memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0); > + memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0, > + MEMBLOCK_NONE); > for (i = 1; i < m68k_num_memory;) { > if (m68k_memory[i].addr < min_addr) { > printk("Ignoring memory chunk at 0x%lx:0x%lx before the first chunk\n", > @@ -421,7 +422,8 @@ void __init paging_init(void) > (m68k_num_memory - i) * sizeof(struct m68k_mem_info)); > continue; > } > - memblock_add_node(m68k_memory[i].addr, m68k_memory[i].size, i); > + memblock_add_node(m68k_memory[i].addr, m68k_memory[i].size, i, > + MEMBLOCK_NONE); > addr = m68k_memory[i].addr + m68k_memory[i].size; > if (addr > max_addr) > max_addr = addr; > diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c > index 76e0a9636a0e..4ac5ba80bbf6 100644 > --- a/arch/mips/loongson64/init.c > +++ b/arch/mips/loongson64/init.c > @@ -77,7 +77,9 @@ void __init szmem(unsigned int node) > (u32)node_id, mem_type, mem_start, mem_size); > pr_info(" start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n", > start_pfn, end_pfn, num_physpages); > - memblock_add_node(PFN_PHYS(start_pfn), PFN_PHYS(node_psize), node); > + memblock_add_node(PFN_PHYS(start_pfn), > + PFN_PHYS(node_psize), node, > + MEMBLOCK_NONE); > break; > case SYSTEM_RAM_RESERVED: > pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n", > diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c > index 6173684b5aaa..adc2faeecf7c 100644 > --- a/arch/mips/sgi-ip27/ip27-memory.c > +++ b/arch/mips/sgi-ip27/ip27-memory.c > @@ -341,7 +341,8 @@ static void __init szmem(void) > continue; > } > memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)), > - PFN_PHYS(slot_psize), node); > + PFN_PHYS(slot_psize), node, > + MEMBLOCK_NONE); > } > } > } > diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c > index 67e5fff96ee0..f3943f15af6e 100644 > --- a/arch/s390/kernel/setup.c > +++ b/arch/s390/kernel/setup.c > @@ -593,7 +593,8 @@ static void __init setup_resources(void) > * part of the System RAM resource. > */ > if (crashk_res.end) { > - memblock_add_node(crashk_res.start, resource_size(&crashk_res), 0); > + memblock_add_node(crashk_res.start, resource_size(&crashk_res), > + 0, MEMBLOCK_NONE); > memblock_reserve(crashk_res.start, resource_size(&crashk_res)); > insert_resource(&iomem_resource, &crashk_res); > } > diff --git a/include/linux/memblock.h b/include/linux/memblock.h > index 4ee8dd2d63a7..2bc726e43a1b 100644 > --- a/include/linux/memblock.h > +++ b/include/linux/memblock.h > @@ -104,7 +104,8 @@ static inline void memblock_discard(void) {} > #endif > > void memblock_allow_resize(void); > -int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); > +int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid, > + enum memblock_flags flags); > int memblock_add(phys_addr_t base, phys_addr_t size); > int memblock_remove(phys_addr_t base, phys_addr_t size); > int memblock_free(phys_addr_t base, phys_addr_t size); > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 73a52aba448f..0117cb35b212 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -2447,7 +2447,7 @@ static inline unsigned long get_num_physpages(void) > * unsigned long max_zone_pfns[MAX_NR_ZONES] = {max_dma, max_normal_pfn, > * max_highmem_pfn}; > * for_each_valid_physical_page_range() > - * memblock_add_node(base, size, nid) > + * memblock_add_node(base, size, nid, MEMBLOCK_NONE) > * free_area_init(max_zone_pfns); > */ > void free_area_init(unsigned long *max_zone_pfn); > diff --git a/mm/memblock.c b/mm/memblock.c > index 184dcd2e5d99..47a56b223141 100644 > --- a/mm/memblock.c > +++ b/mm/memblock.c > @@ -655,6 +655,7 @@ static int __init_memblock memblock_add_range(struct memblock_type *type, > * @base: base address of the new region > * @size: size of the new region > * @nid: nid of the new region > + * @flags: flags of the new region > * > * Add new memblock region [@base, @base + @size) to the "memory" > * type. See memblock_add_range() description for mode details > @@ -663,14 +664,14 @@ static int __init_memblock memblock_add_range(struct memblock_type *type, > * 0 on success, -errno on failure. > */ > int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, > - int nid) > + int nid, enum memblock_flags flags) > { > phys_addr_t end = base + size - 1; > > - memblock_dbg("%s: [%pa-%pa] nid=%d %pS\n", __func__, > - &base, &end, nid, (void *)_RET_IP_); > + memblock_dbg("%s: [%pa-%pa] nid=%d flags=%x %pS\n", __func__, > + &base, &end, nid, flags, (void *)_RET_IP_); > > - return memblock_add_range(&memblock.memory, base, size, nid, 0); > + return memblock_add_range(&memblock.memory, base, size, nid, flags); > } > > /** > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index 917b3528636d..5f873e7f5b29 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -1385,7 +1385,7 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags) > mem_hotplug_begin(); > > if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK)) { > - ret = memblock_add_node(start, size, nid); > + ret = memblock_add_node(start, size, nid, MEMBLOCK_NONE); > if (ret) > goto error_mem_hotplug_end; > } > -- > 2.31.1 > -- Sincerely yours, Mike.