On Monday, 09/08/2003 at 05:34 EST, "Lucius, Leland" <[EMAIL PROTECTED]> wrote: > > However, if anyone uses the HMC reset button or IPL > > button or activate/deactivate button on the HMC, the > > LPAR Linuxes often are damaged. > > > You got me to wondering about the LPAR mode. If VM is able to "postpone" > the RESET or IPL, allowing it's guests to terminate properly, then shouldn't > Linux in an LPAR be able to do the same? > > I wonder how VM does that...
At the request of the operating system, the hardware will send a special signal whenever the subject partition is deactivated. z/VM uses that facility so that it can do a SHUTDOWN when the LPAR is going down, and z/VM simulates that facility for guests. LPAR deactivation protection is available if you have recent microcode on your machine. (The protection has always been in the hardware, but could only be used if the remote hardware management API was used.) Alan Altmark Sr. Software Engineer IBM z/VM Development
