[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-bugs] [Bug 1037] New: host freezes during shutdown of large domains
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1037 Summary: host freezes during shutdown of large domains Product: Xen Version: unstable Platform: x86-64 OS/Version: Linux-2.6 Status: NEW Severity: normal Priority: P2 Component: Hypervisor AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx ReportedBy: krysans@xxxxxxxxxx The host server seems to be starved for resources, and thus unable to respond to any requests (frozen) when a large virtual machine is shutting down. Keir's response: This is pretty simple. The domain's memory map is torn down synchronously when it is killed by domain0, via XEN_DOMCTL_destroydomain. This can take a long time, and during that time that domain0 vcpu is not interruptible. The possible fixes are: 1. Find out which bit of domain_kill() takes the longest time and optimise it so it takes much less time. Unfortunately it is still going to be proportional to the memory size of the domain. 2. Make domain destruction asynchronous (probably by introducing hypervisor threads, analogous to kernel threads). Possibly we need both (1) and (2). I don't think we can avoid doing (2) in the long term, really. -- Configure bugmail: http://bugzilla.xensource.com/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. _______________________________________________ Xen-bugs mailing list Xen-bugs@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-bugs
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