be enabled and disabled dynamically while the system is running. The
existing DOM0_TBUFCONTROL hypercall is used, and three new operations
have been added: enable, disable, and set_size. This is to address
concerns that use of the trace buffers impacts system performance.
The initial value of opt_tbuf_size is set to zero, so that trace
buffers remain disabled by default. They can be enabled as they used
to be, by adding tbuf_size= to the xen command line at boot time. They
can also be turned on and off any time when the system is running. The
size of the trace buffer allocation can also be changed dynamically
while the system is running. The trace buffers may be completely
deallocated by setting the size to zero. No change in buffer size can
be done while tracing is enabled;
Other Changes made:
- Update the constants in tools/xentrace/formats to match those in
public/trace.h
- libxc functions for enable/disable, get/set size
Still left to do:
- remove all ifdef's for trace buffers and the 'trace' build option
- xm command to do enable/disable trace buffers and get/set size
Signed-off-by: Rob Gardner <rob.gardner@hp.com>
list is passed rather than a single string. This expands the config-file
interface so that parameters may be passed to the network scripts from the
config file.
Fix XendRoot._logError (missing asterisk before args parameter).
In XendRoot, allow an empty configuration file. This makes it easier to unit
test code reliant on XendRoot.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
for the command line parsing code in xm create. To make it easier to test,
create.py has changed in structure around the main(argv) function, adding a new
parseCommandLine function.
Remove a large number of useless parameters, where the opts structure was being
passed all over the place, just to eventually log through it. Instead two
methods -- err and warn -- have been broken out from the Opts class, and there
is now no need to pass the opts value everywhere.
Change the parsing inside make_config to remove lots of cut-and-pasted cruft.
Change the documentation to the vif command to indicate that the bridge can be
auto-detected.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
hotplug ones. Added evalVariables and findCommand functions to that, which we
use to clarify the handling of variables being passed in as command line
variables.
Make vif-bridge able to find the bridge for itself if only one bridge is in
use. This means that it is not necessary to specify a bridge in many
configurations. Allow the bridge to be specified on the command line, meaning
that a default may be provided in the xend-config.sxp if desired.
Added xenstore_read_default to xen-hotplug-common.sh, which reads from the
store but uses a given default if the path in the store is not present. This
is used by vif-bridge to allow the store details (i.e. those given to xm create)
to override the default value given in the xend-config.sxp.
Remove vif-bridge setting -- the value can be specified on the vif-script
command line if necessary.
Added examples for network-nat/vif-nat.
Added lots of big comments.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
This was passing down to dhclient which was keeping the 8001 port
open and preventing xend restarting.
Also fixed a case typo in setCloExec
Signed-off-by: James Bulpin <james@xensource.com>
be refused, with the domain being destroyed instead.
Further fix for reboot logic when using on_reboot=rename-restart: the incorrect
node was being removed once restart has completed, leaving Xend to conclude
later that it had crashed in the middle of a restart.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
I thought a magic field in the start_info might be useful. I just chose
"Xen-<major>.<minor>", but feel free to change it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (authored)
by access to 0xc000 port in VMX, qemu will blocked there until it
finished. And during that block, there are extra dom switches between
dom0 and idle domain, and VMX can't be resumed. By making real IDE dma
tranfer run in another thread, qemu will return and VMX resume on time
and there are fewer cycle wasted.
Signed-off-by: Ke Yu <ke.yu@intel.com>
Signed-off-by: Xiaowei Yang <xiaowei.yang@intel.com>
Reject the removal of -Werror from the xentop Makefile.
Reject the #include of xs.h inside xentop -- there is no need for it.
Have XendDomainInfo write domain names into /local/domain (which used to happen,
but hasn't for a little while).
Remove the dead code from xentop.c.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
rather than -a. The former shortcuts at the script level, whereas the latter
does not, which means that the backtick-enclosed arguments are evaluated
regardless of the success of preceding tests.
Tidy the aforementioned test into a function of its own.
Add an implementation of usleep for those systems that only have sleep (Debian,
for example).
Signed-off-by: Ewan Mellor <ewan@xensource.com>
It now allows the user to configure what he wants to be done on
xendomains stop: sysrq, migrate, save, or shutdown.
For this to be safe, a timeout has been introduced (optional).
On start, saved domains may be restored, and not yet started
domains from the auto start dir will be started in addition.
status reports missing domains, restart and reload work as well.
The init script is somewhat SUSE-ish, but it should work on LSB
compliant and on RH based distros as well.
I would appreciate this to be put into tools/examples/init.d/
Signed-off-by: Kurt Garloff <garloff@suse.de>
domain has recently been removed from our list, but with a watch still in
flight. This should fix the intermittent crash in xenconsoled that is plaguing
us at the moment.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
For domain migration, unless you use a rootless setup, you need
to have network storage available. For the poor people like me that
have no SAN, one easy possibility to have it is to use nbd.
Find attached the block-nbd script (in /etc/xen/scripts/) and
an example config file. The block-nbd script is based on the -enbd one.
They have been used successfully in the Xen Tutorial at Linux Kongress.
Signed-off-by: Kurt Garloff <garloff@suse.de>
this aren't beautiful, but this gets the distro-specific code out of the body
of the network-bridge script and into a common place, while still preserving
the existing code behaviour.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
It doesn't make sense to undo the network configuration when stopping
xend since that would cut off all VMs from the network. Undoing the
network setup should be an option independent of xend stop.
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
means that any reads attempted on that tty will not cause handle_tty_read to
segfault looking for an interface that does not exist.
Move the writing of the tty node so that it happens after console/limit has
been read, as it is cleaner if the writing is the last thing that happens.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
whether a domain has been introduced to the store. Added a separate message
XS_IS_DOMAIN_INTRODUCED and API for that (xs_is_domain_introduced) to determine
whether the domain has really been introduced. This change means that the
tools can determine the correct domain path earlier in the domain creation
process, which is particularly a factor with live migration, as it allows us
to create the devices earlier in the process, and unpause the new domain before
performing the introduce. Until recently we already had these features, but
the simplification of the interface between xend and xenstored caused breakage.
No longer clear out the domain path when a domain is introduced -- this was a
hack to work around the recent problematic semantics of GetDomainPath.
Do not write the contents of the info block to the store. All the configuration
info is written to the /vm path, and anything else in the info block is either
dealt with explicitly or is ephemeral and has no place in the store.
Signed-off-by: Ewan Mellor <ewan@xensource.com>
