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Message-Id: <20240625013407.25436-1-lirongqing@baidu.com> Date: Tue, 25 Jun 2024 09:34:07 +0800 From: Li RongQing <lirongqing@...du.com> To: netdev@...r.kernel.org Cc: Li RongQing <lirongqing@...du.com> Subject: [PATCH,net-next,v2][resend] virtio_net: Remove u64_stats_update_begin()/end() for stats fetch This place is fetching the stats, u64_stats_update_begin()/end() should not be used, and the fetcher of stats is in the same context as the updater of the stats, so don't need any protection Acked-by: Michael S. Tsirkin <mst@...hat.com> Suggested-by: Jakub Kicinski <kuba@...nel.org> Signed-off-by: Li RongQing <lirongqing@...du.com> --- drivers/net/virtio_net.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index b1f8b72..f212977 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2382,12 +2382,13 @@ static void virtnet_rx_dim_update(struct virtnet_info *vi, struct receive_queue if (!rq->packets_in_napi) return; - u64_stats_update_begin(&rq->stats.syncp); + /* Don't need protection when fetching stats, since fetcher and + * updater of the stats are in same context + */ dim_update_sample(rq->calls, u64_stats_read(&rq->stats.packets), u64_stats_read(&rq->stats.bytes), &cur_sample); - u64_stats_update_end(&rq->stats.syncp); net_dim(&rq->dim, cur_sample); rq->packets_in_napi = 0; -- 2.9.4
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