>>>1. How can I ensure that memory for the a guest is available and reserved? In other words, I bring up a Linux VM which has 4G allocated, I want to make sure it has all the 4G available right away. I saw references to balloon driver, it seemed like that was more for dynamic memory exchange between host and guest. In my case, it is a Linux guest with a Linux VM. Allocate memory and use all of it(use at boundaries of some bigger chunks). That’s how you can make sure. >>>2. Does the host reclaim pages from guest if it needs it without a balloon driver? Yes >>>3. This might be a very basic question, please bear with me:) If I use virtio for say network and block, does network and block traffic still go through QEMU? Is the host part of virtio basically QEMU or is it something that runs in the host kernel. If QEMU, does every IO still pass through it? Found some >>>conflicting information, so not a 100% sure. Found this, not sure if it is 100% accurate? Trying to understand the flow through different layers, and what the layers are. >>>http://events.linuxfoundation.org/sites/events/files/slides/MasakiKimura_LinuxConNorthAmerica2013_1.pdf Virtio device's I/O will go through QEMU, if you want to bypass QEMU, use vhost=ON on these virtio devices. -----Original Message----- From: kvm-owner@xxxxxxxxxxxxxxx [mailto:kvm-owner@xxxxxxxxxxxxxxx] On Behalf Of Marcus White Sent: Thursday, May 29, 2014 2:30 AM To: kvm Subject: Some more basic questions.. Hello, Some more basic questions.. 1. How can I ensure that memory for the a guest is available and reserved? In other words, I bring up a Linux VM which has 4G allocated, I want to make sure it has all the 4G available right away. I saw references to balloon driver, it seemed like that was more for dynamic memory exchange between host and guest. In my case, it is a Linux guest with a Linux VM. 2. Does the host reclaim pages from guest if it needs it without a balloon driver? 3. This might be a very basic question, please bear with me:) If I use virtio for say network and block, does network and block traffic still go through QEMU? Is the host part of virtio basically QEMU or is it something that runs in the host kernel. If QEMU, does every IO still pass through it? Found some conflicting information, so not a 100% sure. Found this, not sure if it is 100% accurate? Trying to understand the flow through different layers, and what the layers are. http://events.linuxfoundation.org/sites/events/files/slides/MasakiKimura_LinuxConNorthAmerica2013_1.pdf Thank you in Advance:) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html ��.n��������+%������w��{.n�����o�^n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�
