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Mon, 25 Mar 2024 11:05:12 -0400 X-MC-Unique: zoT4-6ziN_K3fLKul_roIA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A0FF63C0DF64; Mon, 25 Mar 2024 15:05:11 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.116.12]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6DEB2C04124; Mon, 25 Mar 2024 15:05:09 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: akpm@linux-foundation.org, rppt@kernel.org, mgorman@suse.de, Baoquan He Subject: [PATCH 1/7] mm/mm_init.c: remove the useless dma_reserve Date: Mon, 25 Mar 2024 23:04:53 +0800 Message-ID: <20240325150459.1045407-2-bhe@redhat.com> In-Reply-To: <20240325150459.1045407-1-bhe@redhat.com> References: <20240325150459.1045407-1-bhe@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 8FD6F40031 X-Stat-Signature: thown9gaojp6dd71jrzksr5k4ybhf58b X-HE-Tag: 1711379115-560546 X-HE-Meta: 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 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: Now nobody calls set_dma_reserve() to set value for dma_reserve, remove global dma_reserve and the codes using it. Signed-off-by: Baoquan He --- include/linux/mm.h | 1 - mm/mm_init.c | 23 ----------------------- 2 files changed, 24 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 0436b919f1c7..ad19350e1538 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3210,7 +3210,6 @@ static inline int early_pfn_to_nid(unsigned long pfn) extern int __meminit early_pfn_to_nid(unsigned long pfn); #endif -extern void set_dma_reserve(unsigned long new_dma_reserve); extern void mem_init(void); extern void __init mmap_init(void); diff --git a/mm/mm_init.c b/mm/mm_init.c index 549e76af8f82..153fb2dc666f 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -226,7 +226,6 @@ static unsigned long required_movablecore_percent __initdata; static unsigned long nr_kernel_pages __initdata; static unsigned long nr_all_pages __initdata; -static unsigned long dma_reserve __initdata; static bool deferred_struct_pages __meminitdata; @@ -1583,12 +1582,6 @@ static void __init free_area_init_core(struct pglist_data *pgdat) zone_names[j], memmap_pages, freesize); } - /* Account for reserved pages */ - if (j == 0 && freesize > dma_reserve) { - freesize -= dma_reserve; - pr_debug(" %s zone: %lu pages reserved\n", zone_names[0], dma_reserve); - } - if (!is_highmem_idx(j)) nr_kernel_pages += freesize; /* Charge for highmem memmap if there are enough kernel pages */ @@ -2547,22 +2540,6 @@ void *__init alloc_large_system_hash(const char *tablename, return table; } -/** - * set_dma_reserve - set the specified number of pages reserved in the first zone - * @new_dma_reserve: The number of pages to mark reserved - * - * The per-cpu batchsize and zone watermarks are determined by managed_pages. - * In the DMA zone, a significant percentage may be consumed by kernel image - * and other unfreeable allocations which can skew the watermarks badly. This - * function may optionally be used to account for unfreeable pages in the - * first zone (e.g., ZONE_DMA). The effect will be lower watermarks and - * smaller per-cpu batchsize. - */ -void __init set_dma_reserve(unsigned long new_dma_reserve) -{ - dma_reserve = new_dma_reserve; -} - void __init memblock_free_pages(struct page *page, unsigned long pfn, unsigned int order) { -- 2.41.0