On 19/06/14 (金) 20:58:06, Jesper Dangaard Brouer wrote:
On Fri, 14 Jun 2019 17:20:14 +0900 Toshiaki Makita <toshiaki.makita1@xxxxxxxxx> wrote:dev_map_free() forgot to free bulk queue when freeing its entries. Fixes: 5d053f9da431 ("bpf: devmap prepare xdp frames for bulking") Signed-off-by: Toshiaki Makita <toshiaki.makita1@xxxxxxxxx> --- kernel/bpf/devmap.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index e001fb1..a126d95 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -186,6 +186,7 @@ static void dev_map_free(struct bpf_map *map) if (!dev) continue;+ free_percpu(dev->bulkq);dev_put(dev->dev); kfree(dev); }Do we need to call need to call dev_map_flush_old() before free_percpu(dev->bulkq) ? Looking the code, I guess this is not needed as, above we are ensuring all pending flush operations have completed.
My understanding is the same. The code waits for NAPI to flush the queue, so no need for dev_map_flush_old().
Acked-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Thanks! Toshiaki Makita
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