From: Jianfeng Tan <jianfeng.tan@intel.com>
To: dev@dpdk.org
Cc: Jianfeng Tan <jianfeng.tan@intel.com>,
maxime.coquelin@redhat.com, yliu@fridaylinux.org
Subject: [dpdk-dev] [PATCH 4/4] vhost: avoid populate guest memory
Date: Wed, 14 Feb 2018 04:01:32 +0000 [thread overview]
Message-ID: <1518580892-32656-5-git-send-email-jianfeng.tan@intel.com> (raw)
In-Reply-To: <1518580892-32656-1-git-send-email-jianfeng.tan@intel.com>
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 <jianfeng.tan@intel.com>
---
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
next prev parent reply other threads:[~2018-02-14 3:59 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-14 4:01 [dpdk-dev] [PATCH 0/4] some fixes target for 18.05 Jianfeng Tan
2018-02-14 4:01 ` [dpdk-dev] [PATCH 1/4] vhost: remove unused macro Jianfeng Tan
2018-02-19 20:49 ` Maxime Coquelin
2018-02-21 7:32 ` Maxime Coquelin
2018-02-14 4:01 ` [dpdk-dev] [PATCH 2/4] vhost: avoid function call in data path Jianfeng Tan
2018-02-19 20:48 ` Maxime Coquelin
2018-02-21 7:32 ` Maxime Coquelin
2018-02-14 4:01 ` [dpdk-dev] [PATCH 3/4] app/testpmd: add option to avoid lock all memory Jianfeng Tan
2018-02-14 6:40 ` Wu, Jingjing
2018-02-24 3:26 ` [dpdk-dev] [PATCH v2] " Jianfeng Tan
2018-04-22 23:05 ` Thomas Monjalon
2018-05-03 11:32 ` Burakov, Anatoly
2018-02-14 4:01 ` Jianfeng Tan [this message]
2018-02-19 20:44 ` [dpdk-dev] [PATCH 4/4] vhost: avoid populate guest memory Maxime Coquelin
2018-02-22 2:42 ` Tan, Jianfeng
2018-02-22 8:25 ` Maxime Coquelin
2018-02-22 8:40 ` Tan, Jianfeng
2018-02-22 12:32 ` Maxime Coquelin
2018-02-23 3:17 ` Tan, Jianfeng
2018-03-28 6:56 ` [dpdk-dev] [PATCH v2] " Jianfeng Tan
2018-03-30 8:21 ` Maxime Coquelin
2018-03-30 8:34 ` Maxime Coquelin
2018-02-21 7:35 ` [dpdk-dev] [PATCH 0/4] some fixes target for 18.05 Maxime Coquelin
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