/* * We enforce a limit on locks by uid, so that a single user cannot * run the kernel out of memory. For now, the limit is pretty coarse. * There is no limit on root. * * Splitting a lock will always succeed, regardless of current allocations. * If you're slightly above the limit, we still have to permit an allocation * so that the unlock can succeed. If the unlocking causes too many splits, * however, you're totally cutoff. */