On 01/15/2014 09:05 AM, Vivek Goyal wrote: > > I think this is a reasonable approach to solve the issue. Use a command > line to not bring up specific cpu in second kernel which can create > problems. > > Acked-by: Vivek Goyal <vgoyal at redhat.com> > > hpa, I know you are not excited about this approach. If you made up your > mind that this appoarch is not worth pursuing, please do suggest what > would you like to see and we can give that a try. > > We want to solve this problem as on large memory machines saving dump can > take lot of time and we want to bring up multiple cpus and speed up > compression and save on dump time. > I'm not excited about kdump's reliance on the command line, since it seems to be a neverending source of trouble, simply because the command line is fundamentally intended as a human interface. However, this seems relatively harmless in comparison with everything else and I am much happier with saving the ID in the first kernel rather than trying to guess if a currently-downed CPU is the BSP. -hpa
