tree eaafe22d2f091d6288864359a546991fde9763c3
parent 902ee661f1864aaf8325621085f6a1b5a6a3673a
author Chris Wilson <chris@chris-wilson.co.uk> 1323120545 +0000
committer Chris Wilson <chris@chris-wilson.co.uk> 1323123730 +0000

intel: Add an interface to limit vma caching

There is a per-process limit on the number of vma that the process can
keep open, so we cannot keep an unlimited cache of unused vma's (besides
keeping track of all those vma in the kernel adds considerable overhead).
However, in order to work around inefficiencies in the kernel it is
beneficial to reuse the vma, so keep a MRU cache of vma.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>