On Fri, Feb 17, 2012 at 04:41:01AM -0800, Eric W. Biederman wrote: > > The fix with a guarantee of no more scope creep is to just disable the > nmi watchdog on the kexec on panic path. > > Don if you have time please figure out is needed to ignore nmi's and > possible record and/or report them while we boot, otherwise please cook > up a patch that just disables the nmi watchdog wherever we are sending > it from (the local apic or the ioapic). Can I keep things even simpler? The original problem was the deadlock with the ioapic lock. We fixed that by removing the call to disable_IO_APIC(). Can we just leave the disable_local_APIC calls in there for now? Is there any real harm? All this rewrite is going to take time which will delay fixing a current problem with kexec on panic, the ioapic deadlock. Thoughts? Cheers, Don
