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Daniel P. Berrange cbde35899b Cache result of QEMU capabilities extraction 
Extracting capabilities from QEMU takes a notable amount of time
when all QEMU binaries are installed. Each system emulator
needs about 200-300ms multiplied by 26 binaries == ~5-8 seconds.

This change causes the QEMU driver to save an XML file containing
the content of the virQEMUCaps object instance in the cache
dir eg /var/cache/libvirt/qemu/capabilities/$SHA256(binarypath).xml
or $HOME/.cache/libvirt/qemu/cache/capabilities/$SHA256(binarypath).xml

We attempt to load this and only if it fails, do we fallback to
probing the QEMU binary. The ctime of the QEMU binary and libvirtd
are stored in the cached file and its data discarded if either
of them change.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
 		2014-03-11 10:59:00 +00:00
.gnulib@72fb9075b2 maint: update to latest gnulib, for older autoconf 2014-02-21 17:18:34 -07:00
build-aux Make syntax check notice assignments w/o surrounding spaces. 2014-01-20 14:35:26 +01:00
daemon Add helper APIs to track if libvirtd or loadable modules have changed 2014-03-11 10:51:49 +00:00
docs doc: storage: Explicitly state that it's possible to have non-unique key 2014-03-05 09:51:24 +01:00
examples add support for apparmor in lxc-enter-namespace 2014-03-04 11:15:47 +00:00
gnulib maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
include Add helper APIs for generating cryptographic hashes 2014-03-10 16:39:18 +00:00
m4 build: use --with-systemd-daemon as configure option 2014-02-26 05:59:22 -07:00
po Add helper APIs for generating cryptographic hashes 2014-03-10 16:39:18 +00:00
src Cache result of QEMU capabilities extraction 2014-03-11 10:59:00 +00:00
tests tests: Distribute securityselinuxhelperdata 2014-03-11 11:07:52 +01:00
tools Change file names in comments to match the files they are in 2014-03-10 14:26:04 +01:00
.ctags maint: Make ctags work out of the box 2013-07-18 08:47:21 +02:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore Wildcard ignore tests/*test instead of listing every one 2014-03-10 13:22:17 +00:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
AUTHORS.in Add Roman Bogorodskiy to the committers list 2014-02-20 20:51:08 +04:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
ChangeLog-old maint: typo fixes 2013-10-22 16:49:32 +01:00
HACKING maint: enforce comma style usage 2013-11-20 09:24:18 -07:00
Makefile.am Introduce Libvirt Wireshark dissector 2014-01-20 17:09:41 +01:00
Makefile.nonreentrant maint: use LGPL correctly 2013-05-20 14:03:48 -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
autobuild.sh Remove python binding 2013-11-25 16:08:00 +00:00
autogen.sh autogen.sh: Correctly detect .git as a file 2013-08-29 13:19:45 +02:00
bootstrap maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
bootstrap.conf Add helpers for getting env vars in a setuid environment 2013-10-21 14:03:52 +01:00
cfg.mk Change file names in comments to match the files they are in 2014-03-10 14:26:04 +01:00
config-post.h build: fix build of virt-login-shell on systems with older gnutls 2013-10-22 09:41:50 -06:00
configure.ac Fix missing char dev lock path case in configure 2014-03-05 22:51:59 +04:00
libvirt.pc.in Add missing 'libvirt_lxc_api' variable in pkg-config file 2013-09-04 14:52:40 +01:00
libvirt.spec.in spec: Let translations be properly updated 2014-03-06 22:18:11 +01:00
mingw-libvirt.spec.in Remove python binding 2013-11-25 16:08:00 +00:00
run.in Remove python binding 2013-11-25 16:08:00 +00:00

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>