Commit 374fb014 authored Sep 08, 2017 by John Fastabend Committed by David S. Miller Sep 08, 2017

bpf: devmap, use cond_resched instead of cpu_relax



Be a bit more friendly about waiting for flush bits to complete.
Replace the cpu_relax() with a cond_resched().

Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 5a67da2a

kernel/bpf/devmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -159,7 +159,7 @@ static void dev_map_free(struct bpf_map *map)
		unsigned long *bitmap = per_cpu_ptr(dtab->flush_needed, cpu);

		while (!bitmap_empty(bitmap, dtab->map.max_entries))
		cpu_relax();
		cond_resched();
		}

		for (i = 0; i < dtab->map.max_entries; i++) {