Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.6 09/17] nfp: flower: fix used time of merge flow statistics | Date | Fri, 5 Jun 2020 08:25:08 -0400 |
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From: Heinrich Kuhn <heinrich.kuhn@netronome.com>
[ Upstream commit 5b186cd60f033110960a3db424ffbd6de4cee528 ]
Prior to this change the correct value for the used counter is calculated but not stored nor, therefore, propagated to user-space. In use-cases such as OVS use-case at least this results in active flows being removed from the hardware datapath. Which results in both unnecessary flow tear-down and setup, and packet processing on the host.
This patch addresses the problem by saving the calculated used value which allows the value to propagate to user-space.
Found by inspection.
Fixes: aa6ce2ea0c93 ("nfp: flower: support stats update for merge flows") Signed-off-by: Heinrich Kuhn <heinrich.kuhn@netronome.com> Signed-off-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/ethernet/netronome/nfp/flower/offload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c index 7ca5c1becfcf..c5dcfdd69773 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/offload.c +++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c @@ -1440,7 +1440,8 @@ __nfp_flower_update_merge_stats(struct nfp_app *app, ctx_id = be32_to_cpu(sub_flow->meta.host_ctx_id); priv->stats[ctx_id].pkts += pkts; priv->stats[ctx_id].bytes += bytes; - max_t(u64, priv->stats[ctx_id].used, used); + priv->stats[ctx_id].used = max_t(u64, used, + priv->stats[ctx_id].used); } } -- 2.25.1
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