On Thu, Jul 06, 2017 at 11:31:35AM -0300, Daniel Henrique Barboza wrote: > > > On 07/05/2017 06:53 PM, Daniel Henrique Barboza wrote: > > Worth a try. I'll see if I can make a POC of this DRC reset at incoming > > migration time. > > > Just played a little with the idea of manual reset during migration. I've > created a > POC that resets the CPU DRCs in a pre_load hook.
Ok. I'm not sure does the pre_load hook get called for objects where nothing ends up being sent in the migration stream? > Then I've done the same > experiment - device_add on both source and target before the migration, > hot unplug the device after migration is completed. The hot unplug worked as > expected in both QEMU and guest. That's encouraging. > > To minimize the impact I am resetting only the DRCs of the CPUs that were > hotplugged > in the target instead of resetting everybody. That sounds like more trouble than it's worth, I think it'll be easier and safer to reset all DRCs. > I'll see if this solution works for LMBs and PCI devices. In case > affirmative, and > if we are fine with this solution of resetting the DRCs in pre_load (not > sure if pre_load is > the right place for doing it - suggestions welcome), I can send a patch to > be applied on top > of this series. > > > > Thanks, > > Daniel > -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson
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