kernel-packages team mailing list archive

[Julian Taylor <jtaylor.debian@xxxxxxxxxxxxxx>]

I know non-anonymous huge pages, like those from hugetblfs, are currently not swappable.
But if I understand the article correctly _anonymous_ huge pages can be swapped.
You lose the benefits of huge pages in this case (as they are split) but the system does not regress in functionality.

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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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