On Tue, Jul 01, 2025 at 04:17:20PM +0200, Thomas Monjalon wrote: > 23/05/2025 01:37, Andre Muezerie: > > The functions rte_rcu_qsbr_dq_create and rte_rcu_qsbr_dq_reclaim establish > > no limit on the size of each element in the defer queue. > > Very good, we need more unlimited API in DPDK. > > > With DPDK 25.11 a hard limit will be set (``RTE_QSBR_ESIZE_MAX``). > > I think it is a step in the wrong direction. > I prefer having no limit. > > > This will allow fixed C arrays to be used in the functions' implementations, > > avoiding VLAs and use of alloca(). > > I don't understand this justification. > Why trying to remove the 2 alloca() in the lib RCU? >
Only because other developer expressed concerns that using alloca() allows ill-intended callers to cause a stack overflow. I personally also prefer to have no hardcoded limits.
