Stack size


Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>QoS and/or fair queueing
└─>Stack size
In linux kernel since version 2.6.12  
Size of the local stack variable used while evaluating the tree of
ematches. Limits the depth of the tree, i.e. the number of
encapsulated precedences. Every level requires 4 bytes of additional
stack space.