[PATCH 0/2] slightly change shrinker behaviour for very small object sets

Glauber Costa
2012-12-19T08:40:16Z

Hi,

I've recently noticed some glitches in the object shrinker mechanism when a
very small number of objects is used. Those situations are theoretically
possible, albeit unlikely. But although it may feel like it is purely
theoretical, they can become common in environments with many small containers
(cgroups) in a box.

Those patches came from some experimentation I am doing with targetted-shrinking
for kmem-limited memory cgroups (Dave Shrinnker is already aware of such work).
In such scenarios, one can set the available memory to very low limits, and it
becomes easy to see this.

Glauber Costa (2):
super: fix calculation of shrinkable objects for small numbers
vmscan: take at least one pass with shrinkers

fs/super.c | 2 +-
mm/vmscan.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)

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1.7.11.7