{ni}KREALTIME(0;K==>c) - Lock in memory

If K is a read-write page key or a node key and the total number of pages or nodes locked is below a kernel defined limit then the page or node designated by K is locked into real memory (the kernel will not replace it with another page or node) and c is 0. If K is not a read write page key or an node key then c is KT+3. If the kernel limit is exceeded then c is 1.

If K is a read-write page key or a node key then the page or node designated by K is unlocked from real memory (it may be paged out) and c is 0. If K is not a read write page key or an node key then c is KT+3.