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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Update xend-config.sxp so that dom0-min-mem is 196MB by default, as this is rather more user friendly.
# HG changeset patch # User iap10@xxxxxxxxxxxxxxxxxxxxx # Node ID 31d86fc0a2713b3c76f79d15a2e9a4f2516ccdc5 # Parent 8754277cec01d26b7174a3ef8644ef557f42ed26 Update xend-config.sxp so that dom0-min-mem is 196MB by default, as this is rather more user friendly. Also do some minor fixes to the README Signed-off-by: ian@xxxxxxxxxxxxx diff -r 8754277cec01 -r 31d86fc0a271 README --- a/README Sat Dec 3 10:41:49 2005 +++ b/README Sat Dec 3 19:05:39 2005 @@ -1,30 +1,31 @@ -############################### -__ __ ____ ___ -\ \/ /___ _ __ |___ \ / _ \ - \ // _ \ '_ \ __) || | | | - / \ __/ | | | / __/ | |_| | -/_/\_\___|_| |_| |_____(_)___/ +################################ + __ __ _____ ___ + \ \/ /___ _ __ |___ / / _ \ + \ // _ \ '_ \ |_ \| | | | + / \ __/ | | | ___) | |_| | + /_/\_\___|_| |_| |____(_)___/ -############################### +################################ -University of Cambridge Computer Laboratory -3 November 2004 - -http://www.cl.cam.ac.uk/netos/xen/ +http://www.xensource.com/xen/about.html What is Xen? ============ Xen is a Virtual Machine Monitor (VMM) originally developed by the Systems Research Group of the University of Cambridge Computer -Laboratory, as part of the UK-EPSRC funded XenoServers project. -Xen is freely-distributable Open Source software, released under the -GNU GPL. +Laboratory, as part of the UK-EPSRC funded XenoServers project. Xen +is freely-distributable Open Source software, released under the GNU +GPL. Since its initial public release, Xen has grown a large +development community, spearheaded by XenSource Inc, a company created +by the original Xen development team to build enterprise products +around Xen. -The 2.0 release offers excellent performance, hardware support and -enterprise-grade features such as live migration. Linux 2.6 and -NetBSD 2.0 are already available for Xen, with more operating system -ports on the way. +The 3.0 release offers excellent performance, hardware support and +enterprise-grade features such as x86_32-PAE, x86_64, SMP gusets and +live relocation of VMs. This install tree contains source for a Linux +2.6 guest; ports to Linux 2.4, NetBSD, FreeBSD and Solaris will follow +later (and are already available for previous Xen releases). This file contains some quick-start instructions to install Xen on your system. For full documentation, see the Xen User Manual. If this @@ -43,29 +44,40 @@ # sh ./install.sh - Amongst other things, this will install Xen and XenLinux kernel - files in /boot, kernel modules and Python packages in /lib, and - various control tools in standard 'bin' directories. + Among other things, this will install Xen and Xen-ready Linux + kernel files in /boot, kernel modules and Python packages in /lib, + and various control tools in standard 'bin' directories. 2. Configure your bootloader to boot Xen and an initial Linux virtual - machine. Note that Xen currently only works with GRUB: less common - alternatives such as LILO are *not* supported. You can most likely - find your GRUB menu file at /boot/grub/menu.lst: edit this file to - include an entry like the following: + machine. Note that Xen currently only works with GRUB and pxelinux + derived boot loaders: less common alternatives such as LILO are + *not* supported. You can most likely find your GRUB menu file at + /boot/grub/menu.lst: edit this file to include an entry like the + following: - # title Xen 2.0 / XenLinux 2.6 - # kernel /boot/xen-2.0.gz dom0_mem=<mem-kb> console=vga - # module /boot/vmlinuz-2.6-xen0 root=<root-dev> ro console=tty0 + title Xen 3.0 / XenLinux 2.6 + kernel /boot/xen-3.0.gz console=vga + module /boot/vmlinuz-2.6-xen root=<root-dev> ro console=tty0 + module /boot/initrd-2.6-xen.img - For <mem-kb> you should specify the amount of memory, in kilobytes, - to allocate for use by your initial XenLinux virtual machine. Note - that Xen itself reserves about 32MB memory for internal use, which - is not available for allocation to virtual machines. - For <root-dev>, specify your usual root partition (e.g., /dev/hda1). + NB: Not all kernel configs need an initial ram disk (initrd), but + if you do specify one you need you'll need to use 'module' grub + directive rather than 'initrd'. -3. Reboot your system and select the "Xen 2.0 / XenLinux 2.6" menu - option. After booting Xen, XenLinux will start and your - initialisation scripts should execute in the usual way. + The linux command line takes all the usual options, such as + root=<root-dev> to specify your usual root partition (e.g., + /dev/hda1). + + The Xen command line takes a number of optional arguments described + in the manual. The most common is 'dom0_mem=xxxM' which sets the + amount of memory to allocate for use by your initial virtual + machine (known as domain 0). Note that Xen itself reserves about + 32MB memory for internal use, which is not available for allocation + to virtual machines. + +3. Reboot your system and select the "Xen 3.0 / XenLinux 2.6" menu + option. After booting Xen, Linux will start and your initialisation + scripts should execute in the usual way. Quick-Start Guide - Source Release ================================== @@ -77,9 +89,11 @@ * GCC (preferably v3.2.x or v3.3.x; older versions are unsupported) * GNU Make * GNU Binutils - * Development install of libcurl (e.g., libcurl-dev) * Development install of zlib (e.g., zlib-dev) - * Development install of Python v2.2 or later (e.g., python-dev) + * Development install of Python v2.3 or later (e.g., python-dev) + * bridge-utils package (/sbin/brctl) + * iproute package (/sbin/ip) + * hotplug or udev [NB. Unless noted otherwise, all the following steps should be performed with root privileges.] @@ -105,16 +119,26 @@ 3. For the very first build, or if you want to destroy existing .configs and build trees, perform the following steps: - # make world + # make KERNELS=linux-2.6-xen world # make install - This will create the directories linux-2.6-xen0/ and - linux-2.6-xenU/ after first cleaning everything. It will - create and install into the dist/ directory which is the - default install location. It will build the xen binary - (xen.gz), the boot images for dom0 and an unprivileged - guest kernel (vmlinuz-2.6.x-xen0 and vmlinuz-2.6.x-xenU - respectively), the tools and the documentation. + It will create and install into the dist/ directory which is the + default install location. It will build the xen binary (xen.gz), + and a linux kernel and modules that can be used in both dom0 and an + unprivileged guest kernel (vmlinuz-2.6.x-xen), the tools and the + documentation. + + If you don't specify KERNELS= on the make command line it will + default to building two kernels, vmlinuz-2.6.x-xen0 and + vmlinuz-2.6.x-xenU. These are smaller builds with just selected + modules, intended primarilly for developers that don't like to wait + for a -xen kernel to build. The -xenU kernel is particularly small + as it does not contain any physical device drivers, and hence is + only useful for guest domains. + + If you want to build an x86_32 PAE capable xen and kernel to work + on machines with >= 4GB of memory, use XEN_TARGET_X86_PAE=y on the + make command line. 4. To rebuild an existing tree without modifying the config: # make dist @@ -124,20 +148,22 @@ 5. To rebuild a kernel with a modified config: - # cd linux-2.6-xen0 # or linux-2.6-xenU + # cd linux-2.6.12-xen # or linux-2.6.12-xen0 etc. # make ARCH=xen menuconfig # or xconfig # cd .. # make dist # make install - You can copy your own config into linux-2.6-xen0 first. Alternatively, you can also copy your config file to dist/install/boot/config-$version-xen0/U. This is picked up when a make dist is done. Include the ARCH=xen directive for all make commands when building the kernels. -6. To see a full list of targets and a brief description, type: - # make help + NB: The need to specify ARCH=xen when building linux is likely to + disappear soon: the Xen patch is being rearranged to become just + another config option rather than a separate 'architecture'. -7. Edit your grub.conf file as described above to have an - appropriate entry for your new kernel. + Depending on your config, you may need to use 'mkinitrd' to create + an initial ram disk, just like a native system e.g. + # depmod 2.6.12.6-xen + # mkinitrd -v -f --with=aacraid --with=sd_mod --with=scsi_mod initrd-2.6.12.6-xen.img 2.6.12.6-xen diff -r 8754277cec01 -r 31d86fc0a271 tools/examples/xend-config.sxp --- a/tools/examples/xend-config.sxp Sat Dec 3 10:41:49 2005 +++ b/tools/examples/xend-config.sxp Sat Dec 3 19:05:39 2005 @@ -105,7 +105,7 @@ # Dom0 will balloon out when needed to free memory for domU. # dom0-min-mem is the lowest memory level (in MB) dom0 will get down to. # If dom0-min-mem=0, dom0 will never balloon out. -(dom0-min-mem 0) +(dom0-min-mem 196) # In SMP system, dom0 will use dom0-cpus # of CPUS # If dom0-cpus = 0, dom0 will take all cpus available _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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