similar to: userspace xenstore watch

Hey everyone, I''m trying to write a simple python program in dom0 that registers a watch on the xenstore to determine when a domU has shutdown. Is there a particular token I should use? Looking through the tools/python/xen/*.py code, I''ve come across the ''control/shutdown'' token... seems promising? My code is attached below. As is, if fails to call the

Hi, recently on irc channel (##xen) was some "discussion" about xen vs kvm... There was idea that it would be nice if domUs could survive dom0 restart, but this needs, for example, to have xenstored running in separate domain. In 2009 Alex Zeffertt posted some patches (http://lists.xensource.com/archives/html/xen-devel/2009-04/msg00696.html) to add this functionallity, but they

Hello, This patch allows userspace tools on a domU to setup a watch on the xenstore. It does this by intercepting XS_WATCH requests written to /proc/xen/xenbus and then re-submitting the request to the in-kernel xenstore interface, in linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c. When a callback occurs, an in-kernel function is invoked, which then reconstructs a response in the format

Seems currently xenstore transaction provides confusing message in different places: a) comment of xs_transaction_start says "You can only have one transaction at any time." However do_transaction_start allows up to 10 transactions created, as long as all other existing transaction channel is idle at the time (conn->transaction == NULL) b) when multiple transactions can be

Dear xen-devel, There''s a race condition in xenfs (xenstore driver) that causes userspace utility xenstore-watch to crash. Normally, the userspace process gets an "OK" from xenfs and then the watch fires immediately after. Occasionally, this happens the other way around: the watch fires before the driver sends "OK", which confuses the xenstore-watch client. It seems

I''ve seen some people asking why exposing xenstore attributes via sysfs could be useful. Here''s why I would really like to see such a patch make it into Xen: I''ve been working on getting domU''s to know enough about themselves to be manageable. I require a 128-bit UUID for each domU, and I require that each domU be able to determine its own UUID in userspace.

It seems that xenstore watches do not work from domU userspace (they obviously do for drivers). In some preliminary debugging of this, there are two aspects of the failure: not sending the watch to xenstore and not handling watch events for userspace watches. The former can be easily fixed by adding the missing ''case XS_WATCH:'' to xenbus_dev_write() in xenbus_dev.c. The

Hi All, I just tried a new installation of Ubuntu 10.04 (64bit) + Xen and am having some trouble starting XEN. I am using the latest mercurial checkout (4.0.2-rc2) and the only change I made was to Config.mk to enable building the OCAML version of xenstored. " CONFIG_OCAML_XENSTORED ?= y". I am using the same kernel I built earlier for a similar Ubuntu 10.04-64bit / Xen 4.0.0

This is an update to the patches sent out on 25th October. I expect, as before, that some of the larger patches won't get to the list so they are also available here: https://github.com/jonludlam/pkg-xen/commits/for-debian6. Changes since last mail: * I have split out the unrelated change to include 2 extra header files in libxen-dev * I have removed some instances of brace expansion

Here is the latest version of the patches to package the ocaml libraries. Changes since last time: * rename the packages from libxen-4.1-ocaml* to libxen-ocaml* - we wont be looking to install multiple concurrent versions of the same package, so the version doesn't need to be in the package name * Removed superfluous GENCONTROL definitions - dh_ocaml does what we need * Removed

Hi list! What''s the correct way to solve this problem? When you select "Xen-compatible" subarchitecture most of the drivers (network,scsi,etc) disappear from the menuconfig.. Currently linux-2.6-xen.hg repository is unusable (as is).. for dom0 and domU also. -- Pasi Kärkkäinen ^ . .

Hello XCI developers, I have a HP6930, downloaded xenclient from the git. And by following the instruction in HOWTO, I could get xenclient boot up fine. I try then to start a guest using xenvm.readme as template and nothing shows on the screen for the guest, although xenops shows 2 doms running. Can you point me to how to start a guest. And also, is the tree downloaded from git enough to arrive

In case of failing due to lack of memory in the system, blkif_init potentially leaves a leak if some of the allocations was sucessfully suceeded. This patch frees the memory allocated, avoiding the leak. Signed-off-by: Glauber de Oliveira Costa <glommer@br.ibm.com> -- glommer _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi there, is there any chance that you update xen-2.0 branch for newer 2.6 linux kernels? I know xen-3.0 is now out, but we''re not going to upgrade our production systems as yet. We''d rather stick with 2.0(-testing) and newer kernels for some more if possible. Thanks! Michal Ludvig -- * Personal homepage: http://www.logix.cz/michal

Small change to remove difference between Xen and mainline deactivate_mm. While there, cleanup prepare_arch_switch as well. This generates identical code. Signed-off-by: Chris Wright <chrisw@osdl.org> --- diff -r ba46bd7f5cdf linux-2.6-xen-sparse/include/asm-xen/asm-i386/mmu_context.h --- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/mmu_context.h Fri Aug 12 15:59:34 2005 +++

Some time in the last few dozen changesets (I''m at 13662:5bb084098493 now) I''ve started getting this error on xm create: [2007-01-29 12:23:41 7373] ERROR (__init__:1072) (13, ''Permission denied'') Traceback (most recent call last): File "/home/brendan/dev/xen/xen-ss.hg/dist/install/usr/lib/python/xen/xend/Xen dDomain.py", line 1364, in

Signed-off-by: Vincent Hanquez <vincent.hanquez@eu.citrix.com> --- tools/ocaml/Makefile | 2 +- tools/ocaml/common.make | 2 +- tools/ocaml/libs/xl/xl.ml | 209 ++++++++++++ tools/ocaml/libs/xl/xl.mli | 209 ++++++++++++ tools/ocaml/libs/xl/xl_stubs.c | 706 ++++++++++++++++++++++++++++++++++++++++ 5 files changed, 1126 insertions(+), 2 deletions(-)

Hello All, I am trying to set up a watch on xentore. According to the documentation xenstore.txt a watch is simply done with the path to the node that the path is going to set, but according to the definitive guide to xen, it is done like a write, path to node and key to be watched. I have tried both and both fail. Probably I have something wrong but it helps to know the correct format. Which

Hi, I want to know how everything communicates with XenStore. Do domUs use the front-end/back-end driver to dom0 and then the back-end driver contacts xenstored? In particular, how do the xenstore-* commands work on a dom0 and domU? And when should unix-domain sockets be used to communicate with xenstored? Thanks, Hayawardh _______________________________________________ Xen-users mailing

The following set of patches package up the ocaml libraries that are part of the standard xen build. The patches are also currently available at: https://github.com/jonludlam/pkg-xen/commits/for-debian There are some things to note: 1. The 5 patches imported from xen-unstable are not, and will not go into the xen-4.1-stable series. However, the patches were created at the request of the