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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 668E7C433F5 for ; Tue, 14 Dec 2021 10:07:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232833AbhLNKHu (ORCPT ); Tue, 14 Dec 2021 05:07:50 -0500 Received: from mail-ed1-f45.google.com ([209.85.208.45]:37652 "EHLO mail-ed1-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229550AbhLNKHs (ORCPT ); Tue, 14 Dec 2021 05:07:48 -0500 Received: by mail-ed1-f45.google.com with SMTP id e3so62043347edu.4 for ; Tue, 14 Dec 2021 02:07:48 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=k2NOXkyG+3Xi/LaxqKiwD8QVVfeQpVdyacMokAorcT0=; b=Pe8gQA4s28WcuMA8QBuu2Et5uBuUpowGCGYcywgfbaM6/jctQmMbv77q1md/kXHBLD vt+3naRMr/c3SN4C93MzSMDwYHzduQy7FmUYJ+nmUaGvDNqr8OvhyQCHbk2AzyVWl+Qf Ulim3Z1M//VBe7ZRQ3v+TYrcU3ZCksJ4WQ4/x4eOJO9AspFbnOAhwynY8KDeTT7OFgpe WF699DphRxAN9aXOPlFgvq+d4/IzK0QpU7OjD4EwyxwMsm8J/586VnuIVYlSwboGyB44 SG4EbIpaHAjHIrYEkSZFWa88rP1NBkkOaN63tGc4oaQQCdzJvj+NkiGd06lXHSmBGdyM YG3Q== X-Gm-Message-State: AOAM5328UIJgAHMpNMb//L2rFHhHsCDH2mQALjWH3WI0erR/Lh2QV35K wzCtdE4Tb59kgwXE9KysHxk= X-Google-Smtp-Source: ABdhPJz4GmvdYet4a2DObPOvSj6PTYHN0QQfIdwUfArVTukQO0yok9F+d9brLyoKbxpp2a5999YMmw== X-Received: by 2002:a05:6402:520e:: with SMTP id s14mr6383408edd.213.1639476467691; Tue, 14 Dec 2021 02:07:47 -0800 (PST) Received: from localhost.localdomain (ip-85-160-4-65.eurotel.cz. [85.160.4.65]) by smtp.gmail.com with ESMTPSA id f5sm839766ejl.219.2021.12.14.02.07.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Dec 2021 02:07:47 -0800 (PST) From: Michal Hocko To: Andrew Morton , David Hildenbrand , Alexey Makhalov Cc: LKML , , Dennis Zhou , Eric Dumazet , Oscar Salvador , Tejun Heo , Christoph Lameter , Nico Pache , Michal Hocko Subject: [PATCH v2 1/4] mm, memory_hotplug: make arch_alloc_nodedata independent on CONFIG_MEMORY_HOTPLUG Date: Tue, 14 Dec 2021 11:07:29 +0100 Message-Id: <20211214100732.26335-2-mhocko@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211214100732.26335-1-mhocko@kernel.org> References: <20211214100732.26335-1-mhocko@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Michal Hocko This is a preparatory patch and it doesn't introduce any functional change. It merely pulls out arch_alloc_nodedata (and co) outside of CONFIG_MEMORY_HOTPLUG because the following patch will need to call this from the generic MM code. Signed-off-by: Michal Hocko --- arch/ia64/mm/discontig.c | 2 - include/linux/memory_hotplug.h | 119 ++++++++++++++++----------------- 2 files changed, 59 insertions(+), 62 deletions(-) diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index 791d4176e4a6..8dc8a554f774 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -608,7 +608,6 @@ void __init paging_init(void) zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page)); } -#ifdef CONFIG_MEMORY_HOTPLUG pg_data_t *arch_alloc_nodedata(int nid) { unsigned long size = compute_pernodesize(nid); @@ -626,7 +625,6 @@ void arch_refresh_nodedata(int update_node, pg_data_t *update_pgdat) pgdat_list[update_node] = update_pgdat; scatter_node_data(); } -#endif #ifdef CONFIG_SPARSEMEM_VMEMMAP int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node, diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index be48e003a518..4355983b364d 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -16,6 +16,65 @@ struct memory_group; struct resource; struct vmem_altmap; +#ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION +/* + * For supporting node-hotadd, we have to allocate a new pgdat. + * + * If an arch has generic style NODE_DATA(), + * node_data[nid] = kzalloc() works well. But it depends on the architecture. + * + * In general, generic_alloc_nodedata() is used. + * Now, arch_free_nodedata() is just defined for error path of node_hot_add. + * + */ +extern pg_data_t *arch_alloc_nodedata(int nid); +extern void arch_free_nodedata(pg_data_t *pgdat); +extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); + +#else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ + +#define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) +#define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) + +#ifdef CONFIG_NUMA +/* + * XXX: node aware allocation can't work well to get new node's memory at this time. + * Because, pgdat for the new node is not allocated/initialized yet itself. + * To use new node's memory, more consideration will be necessary. + */ +#define generic_alloc_nodedata(nid) \ +({ \ + kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ +}) +/* + * This definition is just for error path in node hotadd. + * For node hotremove, we have to replace this. + */ +#define generic_free_nodedata(pgdat) kfree(pgdat) + +extern pg_data_t *node_data[]; +static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) +{ + node_data[nid] = pgdat; +} + +#else /* !CONFIG_NUMA */ + +/* never called */ +static inline pg_data_t *generic_alloc_nodedata(int nid) +{ + BUG(); + return NULL; +} +static inline void generic_free_nodedata(pg_data_t *pgdat) +{ +} +static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) +{ +} +#endif /* CONFIG_NUMA */ +#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ + #ifdef CONFIG_MEMORY_HOTPLUG struct page *pfn_to_online_page(unsigned long pfn); @@ -154,66 +213,6 @@ int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, struct mhp_params *params); #endif /* ARCH_HAS_ADD_PAGES */ -#ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION -/* - * For supporting node-hotadd, we have to allocate a new pgdat. - * - * If an arch has generic style NODE_DATA(), - * node_data[nid] = kzalloc() works well. But it depends on the architecture. - * - * In general, generic_alloc_nodedata() is used. - * Now, arch_free_nodedata() is just defined for error path of node_hot_add. - * - */ -extern pg_data_t *arch_alloc_nodedata(int nid); -extern void arch_free_nodedata(pg_data_t *pgdat); -extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); - -#else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ - -#define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) -#define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) - -#ifdef CONFIG_NUMA -/* - * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat. - * XXX: kmalloc_node() can't work well to get new node's memory at this time. - * Because, pgdat for the new node is not allocated/initialized yet itself. - * To use new node's memory, more consideration will be necessary. - */ -#define generic_alloc_nodedata(nid) \ -({ \ - kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ -}) -/* - * This definition is just for error path in node hotadd. - * For node hotremove, we have to replace this. - */ -#define generic_free_nodedata(pgdat) kfree(pgdat) - -extern pg_data_t *node_data[]; -static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) -{ - node_data[nid] = pgdat; -} - -#else /* !CONFIG_NUMA */ - -/* never called */ -static inline pg_data_t *generic_alloc_nodedata(int nid) -{ - BUG(); - return NULL; -} -static inline void generic_free_nodedata(pg_data_t *pgdat) -{ -} -static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) -{ -} -#endif /* CONFIG_NUMA */ -#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ - void get_online_mems(void); void put_online_mems(void); -- 2.30.2