hi, just for fun my domain overwrote the shared_info_page with some repeated random value, whereafter the domain stopped responding (no surprise there). I could still ''xm list'' my running domains, but trying to ''xm destroy'' the dead domain left xm hanging, and xend unresponsive. The only way to get xend running again was by booting the machine. Calling xc_destroy() in libxc directly still left the domain hanging. This is in the unstable tree. Jacob ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
> just for fun my domain overwrote the shared_info_page with > some repeated > random value, whereafter the domain stopped responding (no > surprise there). > > I could still ''xm list'' my running domains, but trying to ''xm > destroy'' > the dead domain left xm hanging, and xend unresponsive. The > only way to > get xend running again was by booting the machine.That shouldn''t happen, but I''m not totally surprised. We know xend needs to be a bit more defensive -- its one of the reasons for the planned rewrite.> Calling xc_destroy() in libxc directly still left the domain hanging.I suspect this is due to xend not correctly closing down and freeing the shared pages for the device channels. This will stop Xen from doing the final cleanup of the domain, though most of the memory will have been freed. Domains lingering in this state are ugly but fairly harmless. Ian ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
Jacob Gorm Hansen
2005-Feb-04 22:57 UTC
Re: [Xen-devel] DoSing Xend, unable to destroy domain
Ian Pratt wrote:>>I could still ''xm list'' my running domains, but trying to ''xm >>destroy'' >>the dead domain left xm hanging, and xend unresponsive. The >>only way to >>get xend running again was by booting the machine. > > > That shouldn''t happen, but I''m not totally surprised. We know xend needs > to be a bit more defensive -- its one of the reasons for the planned > rewrite.Actually this a bit worse that I first thought, even a normal domU sitting in a tight loop seems immune to destruction :-( Jacob ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel