bpf: add schedule points to map alloc/free
While using large percpu maps, htab_map_alloc() can hold cpu for hundreds of ms. This patch adds cond_resched() calls to percpu alloc/free call sites, all running in process context. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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