On Sun, May 12, 2024 at 11:17:09AM +0300, Tariq Toukan wrote:
>
>
> On 09/05/2024 23:50, Joe Damato wrote:
> > mlx4_en_alloc_frags currently returns -ENOMEM when mlx4_alloc_page
> > fails but does not increment a stat field when this occurs.
> >
> > A new field called alloc_fail has been added to struct mlx4_en_rx_ring
> > which is now incremented in mlx4_en_rx_ring when -ENOMEM occurs.
> >
> > Signed-off-by: Joe Damato <jdamato@xxxxxxxxxx>
> > Tested-by: Martin Karsten <mkarsten@xxxxxxxxxxxx>
> > ---
> > drivers/net/ethernet/mellanox/mlx4/en_rx.c | 4 +++-
> > drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 1 +
> > 2 files changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
> > index 8328df8645d5..15c57e9517e9 100644
> > --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
> > +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
> > @@ -82,8 +82,10 @@ static int mlx4_en_alloc_frags(struct mlx4_en_priv *priv,
> > for (i = 0; i < priv->num_frags; i++, frags++) {
> > if (!frags->page) {
> > - if (mlx4_alloc_page(priv, frags, gfp))
> > + if (mlx4_alloc_page(priv, frags, gfp)) {
> > + ring->alloc_fail++;
> > return -ENOMEM;
> > + }
> > ring->rx_alloc_pages++;
> > }
> > rx_desc->data[i].addr = cpu_to_be64(frags->dma +
> > diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
> > index efe3f97b874f..cd70df22724b 100644
> > --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
> > +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
> > @@ -355,6 +355,7 @@ struct mlx4_en_rx_ring {
> > unsigned long xdp_tx;
> > unsigned long xdp_tx_full;
> > unsigned long dropped;
> > + unsigned long alloc_fail;
> > int hwtstamp_rx_filter;
> > cpumask_var_t affinity_mask;
> > struct xdp_rxq_info xdp_rxq;
>
> Counter should be reset in mlx4_en_clear_stats().
OK, thanks. I'll add that to the v5, alongside any other feedback that
comes in within the next ~24 hours or so.
> BTW, there are existing counters that are missing there already.
> We should add them as well, not related to your series though...
Yea, I see what you mean about the other counters. I think those can
potentially be sent as a 'Fixes' later?
