Re: [libvirt] [PATCH] vl: allow "cont" from panicked state

Il 22/08/2013 10:38, Laszlo Ersek ha scritto: >> > To support 1.5, libvirt should simply be ready to react to unanticipated >> > GUEST_PANICKED events. reboot-on-panic will simply be broken for 1.5 >> > and Linux 3.10+ guests. :( > I'm probably misunderstanding the discussion, but it might be possible > to disable pvpanic even in 1.5 from the host side, with the following hack: > > -global pvpanic.ioport=0 > > In qemu, this will either configure a working pvpanic device on ioport > 0, or the pvpanic device will be genuinely broken. At least it doesn't > (obviously) break other stuff (in v1.5.2): > > (qemu) info mtree > I/O > 0000000000000000-000000000000ffff (prio 0, RW): io > 0000000000000000-0000000000000000 (prio 0, RW): pvpanic > 0000000000000000-0000000000000007 (prio 0, RW): dma-chan No, you're not misunderstanding the discussion. Depending on the priorities of the pvpanic and legacy-DMA regions, it would break DMA channel 0. Channel 0 is (was) used for DRAM refresh, so it should not have any visible effect. However, it may not be entirely disabling pvpanic, just making it mostly invisible. Paolo