search for: enalbed

...ry back to UC guest, to prevent cache polluted by hypervisor access guest memory during UC mode. However, wbinvd is a _very_ time consuming operation, so 1. wbinvd ... timer has a good possibility to expire while irq disabled, it then would be delayed until 2. ... vmentry back to guest (and irq enalbed), timer interrupt then occurs and drops guest at once; 3. drop to hypervisor ... then vmentry and wbinvd again; This loop will run again and again, until lucky enough wbinvd happens not to expire timer and then loop break, usually it would occur 10K~60K times, blocking guest 10s~60s. reprogram...

Hey guys, i have a problem with building a multi-isp gateway using a GNU/Linux box with priority routing enalbed and after all. any ideas what should i do? maybe a step by step intro? thanks in advanced. Deslay

Hello, I just configured postfix so that it uses MySQL database to store virtual domain and user info. When SELinux is enalbed, postfix fails to connect to MySQL. Below is an example error from the mailog file. postfix/trivial-rewrite[4753]: fatal: mysql:/etc/postfix/mysql_virtual_alias_maps.cf(0,lock|fold_fix): table lookup problem When I turn off Selinux, the problem does not appear. How can I configure Selinux to...

Hello, I have now shfited to Centos 5.5, and I am testing live migration between 2 physical hosts with XEN 3.1.2. XEN 3.1.2 (virtualization) is included in centOS 5.5 during the installation phase, so everything is handled by default. A third host with Ubuntu OS serves as the network file system. The three hosts are connected by one D-link gigabit switch (DGS-2205). The downtime of live

From 159251a04afcdcd8ca08e9f2bdfae279b2aa5471 Mon Sep 17 00:00:00 2001 From: Liu Jinsong <jinsong.liu@intel.com> Date: Thu, 31 Oct 2013 06:38:15 +0800 Subject: [PATCH 4/4] XSA-60 security hole: flush cache when vmentry back to UC guest This patch flush cache when vmentry back to UC guest, to prevent cache polluted by hypervisor access guest memory during UC mode. The elegant way to do this

...rlayer socket through msg_control during sendmsg(). This is done by: 1) Doing userspace copy inside vhost_net 2) Build XDP buff 3) Batch at most 64 (VHOST_NET_BATCH) XDP buffs and submit them once through msg_control during sendmsg(). 4) Underlayer sockets can use XDP buffs directly when XDP is enalbed, or build skb based on XDP buff. For the packet that can not be built easily with XDP or for the case that batch submission is hard (e.g sndbuf is limited). We will go for the previous slow path, passing iov iterator to underlayer socket through sendmsg() once per packet. This can help to impr...

...rlayer socket through msg_control during sendmsg(). This is done by: 1) Doing userspace copy inside vhost_net 2) Build XDP buff 3) Batch at most 64 (VHOST_NET_BATCH) XDP buffs and submit them once through msg_control during sendmsg(). 4) Underlayer sockets can use XDP buffs directly when XDP is enalbed, or build skb based on XDP buff. For the packet that can not be built easily with XDP or for the case that batch submission is hard (e.g sndbuf is limited). We will go for the previous slow path, passing iov iterator to underlayer socket through sendmsg() once per packet. This can help to impr...

...rlayer socket through msg_control during sendmsg(). This is done by: 1) Doing userspace copy inside vhost_net 2) Build XDP buff 3) Batch at most 64 (VHOST_NET_BATCH) XDP buffs and submit them once through msg_control during sendmsg(). 4) Underlayer sockets can use XDP buffs directly when XDP is enalbed, or build skb based on XDP buff. For the packet that can not be built easily with XDP or for the case that batch submission is hard (e.g sndbuf is limited). We will go for the previous slow path, passing iov iterator to underlayer socket through sendmsg() once per packet. This can help to impr...