Colin - In your copious spare time perhaps you could try building this
Natty master-next kernel and testing it on an SB:
The following changes since commit 006d932cf137dfcc156647dc08a0dda6e3e0f890:
Tao Ma (1):
ext4: init timer earlier to avoid a kernel panic in __save_error_info,
CVE-2011-2493
are available in the git repository at:
git://kernel.ubuntu.com/rtg/ubuntu-natty.git lp808509-kswapd
Mel Gorman (5):
mm: vmscan: correct check for kswapd sleeping in sleeping_prematurely
mm: vmscan: kswapd should not free an excessive number of pages when
balancing small zones
mm: vmscan: do not apply pressure to slab if we are not applying pressure
to zone
mm: vmscan: evaluate the watermarks against the correct classzone
mm: vmscan: only read new_classzone_idx from pgdat when reclaiming
successfully
include/linux/swap.h | 9 ++++++
mm/vmscan.c | 75 ++++++++++++++++++++++++++++++++------------------
2 files changed, 57 insertions(+), 27 deletions(-)
** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2011-2493
** Also affects: linux (Ubuntu Natty)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Oneiric)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Oneiric)
Status: New => Fix Released
** Changed in: linux (Ubuntu Natty)
Status: New => In Progress
** Changed in: linux (Ubuntu Natty)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
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https://bugs.launchpad.net/bugs/808509
Title:
SRU: Stop kswapd consuming 100% CPU when highest zone is small
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