From patchwork Fri Jun 9 08:29:37 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olivier Matz X-Patchwork-Id: 25222 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 520182BB8; Fri, 9 Jun 2017 10:29:33 +0200 (CEST) Received: from proxy.6wind.com (host.76.145.23.62.rev.coltfrance.com [62.23.145.76]) by dpdk.org (Postfix) with ESMTP id 99B662BA1; Fri, 9 Jun 2017 10:29:31 +0200 (CEST) Received: from glumotte.dev.6wind.com (unknown [10.16.0.195]) by proxy.6wind.com (Postfix) with ESMTP id 003D98D04A; Fri, 9 Jun 2017 10:29:35 +0200 (CEST) From: Olivier Matz To: dev@dpdk.org Cc: matvejchikov@gmail.com, adrien.mazarguil@6wind.com, jblunck@infradead.org, sergio.gonzalez.monroy@intel.com, stable@dpdk.org Date: Fri, 9 Jun 2017 10:29:37 +0200 Message-Id: <20170609082937.21294-1-olivier.matz@6wind.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170609102727.0eb7f39d@platinum> References: <20170609102727.0eb7f39d@platinum> Subject: [dpdk-dev] [PATCH] eal: don't advertise a physical address when no hugepages X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" When populating a mempool with a virtual memory area, the mempool library expects to be able to get the physical address of each page. When started with --no-huge, the physical addresses may not be available because the pages are not locked in memory. It sometimes returns RTE_BAD_PHYS_ADDR, which makes the mempool_populate() function to fail. This was working before the commit cdc242f260e7 ("eal/linux: support running as unprivileged user"), because rte_mem_virt2phy() was returning 0 instead of RTE_BAD_PHYS_ADDR, which was seen as a valid physical address. Since --no-huge is a debug function that breaks the support of physical drivers, always set physical addresses to RTE_BAD_PHYS_ADDR in memzones or in rte_mem_virt2phy(), and ensure that mempool won't complain in that case. Fixes: cdc242f260e7 ("eal/linux: support running as unprivileged user") CC: stable@dpdk.org Signed-off-by: Olivier Matz Tested-by: Adrien Mazarguil --- lib/librte_eal/common/eal_common_memzone.c | 5 ++++- lib/librte_eal/linuxapp/eal/eal_memory.c | 7 +++++++ lib/librte_mempool/rte_mempool.c | 2 +- 3 files changed, 12 insertions(+), 2 deletions(-) diff --git a/lib/librte_eal/common/eal_common_memzone.c b/lib/librte_eal/common/eal_common_memzone.c index 3026e36b8..c465c8fc2 100644 --- a/lib/librte_eal/common/eal_common_memzone.c +++ b/lib/librte_eal/common/eal_common_memzone.c @@ -251,7 +251,10 @@ memzone_reserve_aligned_thread_unsafe(const char *name, size_t len, mcfg->memzone_cnt++; snprintf(mz->name, sizeof(mz->name), "%s", name); - mz->phys_addr = rte_malloc_virt2phy(mz_addr); + if (rte_eal_has_hugepages()) + mz->phys_addr = rte_malloc_virt2phy(mz_addr); + else + mz->phys_addr = RTE_BAD_PHYS_ADDR; mz->addr = mz_addr; mz->len = (requested_len == 0 ? elem->size : requested_len); mz->hugepage_sz = elem->ms->hugepage_sz; diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c index 9c9baf628..1c99852f6 100644 --- a/lib/librte_eal/linuxapp/eal/eal_memory.c +++ b/lib/librte_eal/linuxapp/eal/eal_memory.c @@ -108,6 +108,13 @@ test_phys_addrs_available(void) if (rte_xen_dom0_supported()) return; + if (!rte_eal_has_hugepages()) { + RTE_LOG(ERR, EAL, + "Started without hugepages support, physical addresses not available\n"); + phys_addrs_available = false; + return; + } + physaddr = rte_mem_virt2phy(&tmp); if (physaddr == RTE_BAD_PHYS_ADDR) { RTE_LOG(ERR, EAL, diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c index f65310f60..6fc3c9c7c 100644 --- a/lib/librte_mempool/rte_mempool.c +++ b/lib/librte_mempool/rte_mempool.c @@ -476,7 +476,7 @@ rte_mempool_populate_virt(struct rte_mempool *mp, char *addr, /* required for xen_dom0 to get the machine address */ paddr = rte_mem_phy2mch(-1, paddr); - if (paddr == RTE_BAD_PHYS_ADDR) { + if (paddr == RTE_BAD_PHYS_ADDR && rte_eal_has_hugepages()) { ret = -EINVAL; goto fail; }