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Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
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Michal Privoznik 96a02703da sanlock: Retry after EINPROGRESS 
It may take some time for sanlock to add a lockspace. And if user
restart libvirtd service meanwhile, the fresh daemon can fail adding
the same lockspace with EINPROGRESS. Recent sanlock has
sanlock_inq_lockspace() function which should block until lockspace
changes state. If we are building against older sanlock we should
retry a few times before claiming an error. This issue can be easily
reproduced:

for i in {1..1000} ; do echo $i; service libvirtd restart; sleep 2; done
20
Stopping libvirtd daemon:                                  [FAILED]
Starting libvirtd daemon:                                  [  OK  ]
21
Stopping libvirtd daemon:                                  [  OK  ]
Starting libvirtd daemon:                                  [  OK  ]
22
Stopping libvirtd daemon:                                  [  OK  ]
Starting libvirtd daemon:                                  [  OK  ]

 error : virLockManagerSanlockSetupLockspace:334 : Unable to add
 lockspace /var/lib/libvirt/sanlock/__LIBVIRT__DISKS__: Operation now in
 progress
2012-11-16 08:00:11 +01:00
.gnulib@d245e6ddd6 maint: update to latest gnulib 2012-10-22 20:25:44 -06:00
build-aux Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
daemon Remove spurious whitespace between function name & open brackets 2012-11-02 13:36:49 +00:00
docs qemu: add bootindex for usb-host and usb-redir devices 2012-11-14 19:03:18 -07:00
examples Introduce new VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR event 2012-11-07 12:06:05 +01:00
gnulib build: fix fresh checkout on RHEL5 2012-04-19 17:11:43 -06:00
include nodeinfo: Add check and workaround to guarantee valid cpu topologies 2012-11-13 00:35:29 +01:00
m4 build: improve FORTIFY_SOURCE usage 2012-10-23 14:00:32 -06:00
po Release of libvirt-1.0.0 2012-11-02 12:08:11 +08:00
python python: Use virNodeGetCPUMap where possible 2012-11-15 09:01:53 -07:00
src sanlock: Retry after EINPROGRESS 2012-11-16 08:00:11 +01:00
tests Add metadata to virLogOutputFunc 2012-11-14 19:14:07 -07:00
tools virsh: save: report an error if XML file can't be read 2012-11-15 22:21:35 -07:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore gitignore: ignore more files 2012-11-05 15:56:42 +01:00
.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 Doug Goldstein gained commit capability 2012-11-15 09:34:01 +08:00
autobuild.sh Switch automated builds to use Mingw64 toolchain instead of Mingw32 2012-06-25 10:41:10 +01:00
autogen.sh build: avoid infinite autogen loop 2012-10-01 09:47:38 -06:00
bootstrap maint: regenerate bootstrap 2012-07-27 09:34:04 -06:00
bootstrap.conf build: prefer mkostemp for multi-thread safety 2012-10-31 10:06:10 -06:00
cfg.mk build: rerun bootstrap if AUTHORS is missing 2012-11-14 13:41:15 -07:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac sanlock: Retry after EINPROGRESS 2012-11-16 08:00:11 +01:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
libvirt.pc.in build: silence warning from autoconf 2012-05-30 09:22:02 -06:00
libvirt.spec.in spec: replace scriptlets with new systemd macros 2012-11-05 14:30:56 -07:00
Makefile.am Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw-libvirt.spec.in parallels: add driver skeleton 2012-08-01 11:44:26 +08:00
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
run.in syntax-check: fix run.in 2012-09-18 13:59:53 +02:00
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>