A computer system for facilitating processing in a computing environment, said computer system comprising: a memory; and a processor in communications with the memory, wherein the computer system is configured to perform a method, said method characterised by comprising: providing by a host operating system to a guest operating system an indication of installation of a warning track facility within the computing environment, the indication of installation to be obtained by the guest operating system, and the warning track facility to provide to the guest operating system a grace period to perform a first function; obtaining, by the host operating system based on the providing, an unsolicited indication that the guest operating system has registered for the warning track facility, the registration comprising an indication to the host operating system that the guest operating system understands a protocol of the warning track facility and intends to participate in the warning track facility; enabling, based on obtaining the indication that the guest operating system has registered, the warning track facility for the guest operating system; notifying the guest operating system, by the host operating system, that the grace period has begun; and performing by the host operating system a second function subsequent to the grace period. a memory; and a processor in communications with the memory, wherein the computer system is configured to perform a method, said method characterised by comprising: providing by a host operating system to a guest operating system an indication of installation of a warning track facility within the computing environment, the indication of installation to be obtained by the guest operating system, and the warning track facility to provide to the guest operating system a grace period to perform a first function; obtaining, by the host operating system based on the providing, an unsolicited indication that the guest operating system has registered for the warning track facility, the registration comprising an indication to the host operating system that the guest operating system understands a protocol of the warning track facility and intends to participate in the warning track facility; enabling, based on obtaining the indication that the guest operating system has registered, the warning track facility for the guest operating system; notifying the guest operating system, by the host operating system, that the grace period has begun; and performing by the host operating system a second function subsequent to the grace period. providing by a host operating system to a guest operating system an indication of installation of a warning track facility within the computing environment, the indication of installation to be obtained by the guest operating system, and the warning track facility to provide to the guest operating system a grace period to perform a first function; obtaining, by the host operating system based on the providing, an unsolicited indication that the guest operating system has registered for the warning track facility, the registration comprising an indication to the host operating system that the guest operating system understands a protocol of the warning track facility and intends to participate in the warning track facility; enabling, based on obtaining the indication that the guest operating system has registered, the warning track facility for the guest operating system; notifying the guest operating system, by the host operating system, that the grace period has begun; and performing by the host operating system a second function subsequent to the grace period.