Comment 93 for bug 1124250

With respect to the mapping cache capacity, there are two problems that need addressing:

 (1) The capacity of a keyring isn't sufficient (~1024 on 32-bits, ~512 on 64-bits). I have patches to expand this, but they're not quite upstream yet. This limits the size of the cache.

 (2) The default maximum number of keys (quota) is only 200. This can be altered from the running kernel as mentioned in comment 7 by tweaking sysctls for the moment. Ideally, though, kernel-wrought keys like this shouldn't be counted towards quota - something that will require a patch.