Hello Michael, On Mon, 02 Apr 2012 19:15:33 +0200 Michael Holzheu <holzheu at linux.vnet.ibm.com> wrote: > Hello Ken'ichi, > > On Thu, 2012-03-29 at 17:09 +0900, Ken'ichi Ohmichi wrote: > > On Wed, 28 Mar 2012 17:22:04 -0400 > > makedumpfile uses the system memory of 2nd-kernel for a bitmap if RHEL. > > The bitmap represents each page of 1st-kernel is excluded or not. > > So the bitmap size depends on 1st-kernel's system memory. > > Does this mean that makedumpfile's memory demand linearly grows with 1 > bit per page of 1-st kernel's memory? Yes, you are right. (Precisely, 2 bit per page.) > Is that the exact factor, if /tmp is in memory? Or is there any other > memory allocation that is not constant regarding the 1-st kernel memory > size? bitmap file is main cause of memory consuming if 2nd kernel uses initramfs only. There are other parts where the size of allocated memory varies based on 1-st kernel memory size, but they don't have big influence. Thanks Atsushi Kumagai
