Thread (13 messages) flat view 13 messages, 4 authors, 2021-05-07

Re: [igb] netconsole triggers warning in netpoll_poll_dev

From: Alexander Duyck <hidden>
Date: 2021-04-07 16:25:43
Also in: intel-wired-lan, lkml

On Wed, Apr 7, 2021 at 8:37 AM Jakub Kicinski [off-list ref] wrote:
quoted hunk ↗ jump to hunk
On Wed, 7 Apr 2021 08:00:53 +0200 Oleksandr Natalenko wrote:
quoted
Thanks for the effort, but reportedly [1] it made no difference,
unfortunately.

[1] https://bugzilla.kernel.org/show_bug.cgi?id=212573#c8
The only other option I see is that somehow the NAPI has no rings.
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index a45cd2b416c8..24568adc2fb1 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -7980,7 +7980,7 @@ static int igb_poll(struct napi_struct *napi, int budget)
        struct igb_q_vector *q_vector = container_of(napi,
                                                     struct igb_q_vector,
                                                     napi);
-       bool clean_complete = true;
+       bool clean_complete = q_vector->tx.ring || q_vector->rx.ring;
        int work_done = 0;

 #ifdef CONFIG_IGB_DCA
It might make sense to just cast the work_done as a unsigned int, and
then on the end of igb_poll use:
  return min_t(unsigned int, work_done, budget - 1);
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