From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id 0C5FF68BB for ; Tue, 10 Jun 2014 13:11:13 +0200 (CEST) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP; 10 Jun 2014 04:06:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,1008,1392192000"; d="scan'208";a="545649797" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by fmsmga001.fm.intel.com with ESMTP; 10 Jun 2014 04:11:25 -0700 Received: from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com [10.237.217.45]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id s5ABBPv7000726; Tue, 10 Jun 2014 12:11:25 +0100 Received: from sivswdev01.ir.intel.com (localhost [127.0.0.1]) by sivswdev01.ir.intel.com with ESMTP id s5ABBPm2011565; Tue, 10 Jun 2014 12:11:25 +0100 Received: (from aburakov@localhost) by sivswdev01.ir.intel.com with id s5ABBPWC011561; Tue, 10 Jun 2014 12:11:25 +0100 From: Anatoly Burakov To: dev@dpdk.org Date: Tue, 10 Jun 2014 12:11:18 +0100 Message-Id: <9c6107fe6935b1e9bf182c499d95f8e4043504e6.1402397285.git.anatoly.burakov@intel.com> X-Mailer: git-send-email 1.7.0.7 In-Reply-To: References: In-Reply-To: References: Subject: [dpdk-dev] [PATCH v5 16/20] eal: make --no-huge use mmap instead of malloc X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Jun 2014 11:11:16 -0000 This makes it possible to run DPDK without hugepage memory when VFIO is used, as VFIO uses virtual addresses to set up DMA mappings. Technically, malloc is just fine, but we want to guarantee that memory will be page-aligned, so using mmap to be safe. Signed-off-by: Anatoly Burakov --- lib/librte_eal/linuxapp/eal/eal_memory.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c index 8d1edd9..315214b 100644 --- a/lib/librte_eal/linuxapp/eal/eal_memory.c +++ b/lib/librte_eal/linuxapp/eal/eal_memory.c @@ -1031,7 +1031,13 @@ rte_eal_hugepage_init(void) /* hugetlbfs can be disabled */ if (internal_config.no_hugetlbfs) { - addr = malloc(internal_config.memory); + addr = mmap(NULL, internal_config.memory, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); + if (addr == MAP_FAILED) { + RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__, + strerror(errno)); + return -1; + } mcfg->memseg[0].phys_addr = (phys_addr_t)(uintptr_t)addr; mcfg->memseg[0].addr = addr; mcfg->memseg[0].len = internal_config.memory; -- 1.8.1.4