From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id EEAB81B31B for ; Wed, 14 Feb 2018 04:59:50 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Feb 2018 19:59:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,510,1511856000"; d="scan'208";a="34520071" Received: from dpdk06.sh.intel.com ([10.67.110.196]) by orsmga002.jf.intel.com with ESMTP; 13 Feb 2018 19:59:49 -0800 From: Jianfeng Tan To: dev@dpdk.org Cc: Jianfeng Tan , maxime.coquelin@redhat.com, yliu@fridaylinux.org Date: Wed, 14 Feb 2018 04:01:32 +0000 Message-Id: <1518580892-32656-5-git-send-email-jianfeng.tan@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1518580892-32656-1-git-send-email-jianfeng.tan@intel.com> References: <1518580892-32656-1-git-send-email-jianfeng.tan@intel.com> Subject: [dpdk-dev] [PATCH 4/4] vhost: avoid populate guest memory 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: , X-List-Received-Date: Wed, 14 Feb 2018 03:59:51 -0000 It's not necessary to polulate guest memory from vhost side. Cc: maxime.coquelin@redhat.com Cc: yliu@fridaylinux.org Signed-off-by: Jianfeng Tan --- lib/librte_vhost/vhost_user.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c index 90ed211..9bd0391 100644 --- a/lib/librte_vhost/vhost_user.c +++ b/lib/librte_vhost/vhost_user.c @@ -644,6 +644,7 @@ vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg) uint64_t mmap_offset; uint64_t alignment; uint32_t i; + int populate; int fd; if (dev->mem && !vhost_memory_changed(&memory, dev->mem)) { @@ -714,8 +715,9 @@ vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg) } mmap_size = RTE_ALIGN_CEIL(mmap_size, alignment); + populate = (dev->dequeue_zero_copy) ? MAP_POPULATE : 0; mmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, - MAP_SHARED | MAP_POPULATE, fd, 0); + MAP_SHARED | populate, fd, 0); if (mmap_addr == MAP_FAILED) { RTE_LOG(ERR, VHOST_CONFIG, -- 2.7.4