kernel-packages team mailing list archive

[Eric Munson <743688@xxxxxxxxxxxxxxxxxx>]

@Julian,

That isn't what the article is saying.  Huge pages are not swappable at
the moment.  However Andrea's work splits huge pages into base pages for
a number of reasons, one of those is memory pressure that would force
part of the page to be swapped out.

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https://bugs.launchpad.net/bugs/743688

Title:
  Transparent HugePages not enabled in 11.04 kernel

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Transparent hugepages, which is a major performance enhancement in the
  2.6.38 kernel is not enabled in the 11.04 kernel.:

  $ cat /etc/issue 
  Ubuntu natty (development branch) \n \l

  $ grep TRANSPARENT /boot/config-2.6.38-7-server
  # CONFIG_TRANSPARENT_HUGEPAGE is not set
  $ grep TRANSPARENT /boot/config-2.6.38-7-generic
  # CONFIG_TRANSPARENT_HUGEPAGE is not set
  $ 

  If this is the way 11.04 kernels will be built, it's a bummer.

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