[PATCH 1/2] Warn about Rock cache_dir disk space waste.

In some configurations Rock cache_dir may hit the maximum entry limit.
In that case a significant disk space may be wasted. Before recent
SMP-related changes, there was code to warn the user about such
situations. The patch resurrects that code, adjusting it as needed to
match the current realities.

---
 src/fs/rock/RockSwapDir.cc |   35 ++++++++++++++++-------------------
 1 files changed, 16 insertions(+), 19 deletions(-)