makedumpfile memory usage grows with system memory size

Michael Holzheu holzheu at
Mon Apr 2 13:15:33 EDT 2012

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?

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


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