No, 2.6.14-1.1656_FC4 should not have the problem. That is actually the kernel the server that was having the problem is currently running. The slab debugging is only on in test/developments kernels as far as I know, and 2.6.14-1.1656_FC4 is a normal kernel. But your problem still sounds a lot like mine. I suggest examining /proc/meminfo and /proc/vmstat for clues. Also compare the results from a working kernel and a problem kernel.First, my mistake, the kernel is 2.6.14-1.1656_FC4 not 2.4.16-1is slab debugging turned on in this kernel? and if so how do I disable it without rebuilding the kernel? can I write something to /proc/???