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5298551e07
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Eric Blake 5298551e07 init: raise default system aio limits 
https://bugzilla.redhat.com/show_bug.cgi?id=740899 documents that
if qemu uses aio=native for its disks, then it consumes 128 aio
requests per disk.  On a host with multiple guests, this can quickly
run out of kernel aio requests with the default aio-max-nr of
65536.  Kernel developers have confirmed that there is no up-front
cost to raising this limit (a larger limit merely implies that more
aio requests can be issued in parallel, which in turn will result
in more kernel memory allocation, only if the system really does use
that many requests).  Since the system default limit prevents 256
disks, which is well within libvirt's current scalability, this
patch installs a file to raise the limit and document it in case a
system administrator has further cause to tune the limit.  The
install only works on platforms new enough to source /etc/sysctl.d/*
alongside /etc/sysctl.conf (F14 and RHEL 6).

* daemon/libvirtd.sysctl: New file.
* daemon/Makefile.am (EXTRA_DIST): Ship it.
(install-init, uninstall-init): Install it.
* libvirt.spec.in (%files): Include it in rpm.
2011-10-05 14:49:35 -06:00
.gnulib@da1717b7f9 maint: update to latest gnulib 2011-09-08 14:36:46 +01:00
daemon init: raise default system aio limits 2011-10-05 14:49:35 -06:00
docs Allow passing of command line args to LXC container 2011-10-04 14:15:09 +01:00
examples snapshot: better events when starting paused 2011-09-02 10:00:06 -06:00
gnulib freebsd: Fix build problem due to picking up the wrong libvirt.h 2011-07-29 07:35:54 -06:00
include maint: fix minor issues in virterror public header 2011-10-05 12:33:59 -06:00
m4 tests: Lower stack usage below 4096 bytes 2011-04-30 19:59:52 +02:00
po Release of libvirt-0.9.6 2011-09-22 14:53:23 +08:00
python python: Fix bindings generated in VPATH build 2011-09-16 17:07:57 +02:00
src snapshot: enforce REVERT_FORCE on qemu 2011-10-05 11:33:39 -06:00
tests qemu: make PCI multifunction support more manual 2011-10-01 11:48:28 -04:00
tools snapshot: add REVERT_FORCE to API 2011-10-05 11:33:36 -06:00
.dir-locals.el maint: let emacs avoid tabs in rng files 2011-08-13 08:56:26 -06:00
.gitignore Prevent crash from dlclose() of libvirt.so 2011-09-16 15:51:31 -06:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap bridge_driver.c: Fix autoconf setting 2011-10-03 23:35:29 -04:00
AUTHORS maint: update authors 2011-09-23 19:15:37 +02:00
autobuild.sh Remove the Open Nebula driver 2011-03-28 14:09:11 +01:00
autogen.sh build: avoid problems with autogen.sh runs from tarball 2011-02-12 06:28:28 -07:00
bootstrap build: fix compilation on mingw64 2011-08-19 07:20:10 -06:00
bootstrap.conf build: work around lack of MacOS fdatasync 2011-09-16 17:42:28 -06:00
cfg.mk remote: fix crash on OOM 2011-09-21 16:17:20 +08:00
ChangeLog-old generate ChangeLog from git logs into distribution tarball 2009-07-08 16:17:51 +02:00
configure.ac Release of libvirt-0.9.6 2011-09-22 14:53:23 +08:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING build: rename files.h to virfile.h 2011-07-21 10:34:51 -06:00
libvirt.pc.in * libvirt.pc.in: applied patch from Daniel Berrange to fix --cflags 2006-03-24 13:18:12 +00:00
libvirt.spec.in init: raise default system aio limits 2011-10-05 14:49:35 -06:00
Makefile.am maint: add missing copyright notices 2011-07-28 15:01:17 -06:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw32-libvirt.spec.in snapshot: update rng to support full domain in xml 2011-09-03 08:12:13 -06:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

README 

         LibVirt : simple API for virtualization

  Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.

Daniel Veillard <veillard@redhat.com>