On 04/15/2015 08:57 AM, Dave Young wrote: > Again, I think it is bad to use old page table, below issues need consider: > 1) make sure old page table are reliable across crash > 2) do not allow writing oldmem after crash > > Please correct me if I'm wrong, or if above is not doable I think I will vote for > resetting pci bus. > > Thanks > Dave > Hi Dave, When updating the context tables, we have to write their address to root tables, this will cause writing to old mem. Resetting the pci bus has been discussed, please check this: http://lists.infradead.org/pipermail/kexec/2014-October/012752.html https://lkml.org/lkml/2014/10/21/890 Thanks Zhenhua
