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authorJohn Fastabend2017-09-08 14:01:10 -0700
committerDavid S. Miller2017-09-08 21:11:00 -0700
commit374fb014fc5b15e420faa00af036868a635eadd3 (patch)
tree0925d65fb3e7e0eec9f6d08f22086a861d294dac
parent5a67da2a71c64daeb456f6f3e87b5c7cecdc5ffa (diff)
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>
-rw-r--r--kernel/bpf/devmap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c
index ecf9f99ecc57..959c9a07f318 100644
--- a/kernel/bpf/devmap.c
+++ b/kernel/bpf/devmap.c
@@ -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++) {