Subject: [RFC PATCH] net: fec: Avoid to allocate rx buffer using ATOMIC in ndo_open

Signed-off-by: Michael Trimarchi <[email protected]>
---
drivers/net/ethernet/freescale/fec_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 9f33ec838b52..09eb6ea9a584 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3076,7 +3076,7 @@ fec_enet_alloc_rxq_buffers(struct net_device *ndev, unsigned int queue)
rxq = fep->rx_queue[queue];
bdp = rxq->bd.base;
for (i = 0; i < rxq->bd.ring_size; i++) {
- skb = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE);
+ skb = __netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE, GFP_KERNEL);
if (!skb)
goto err_alloc;

--
2.25.1



2022-05-18 04:16:08

by Jakub Kicinski

[permalink] [raw]
Subject: Re: [RFC PATCH] net: fec: Avoid to allocate rx buffer using ATOMIC in ndo_open

On Tue, 17 May 2022 12:05:44 +0200 Michael Trimarchi wrote:
> Subject: [RFC PATCH] net: fec: Avoid to allocate rx buffer using ATOMIC in ndo_open

nit: "Avoid allocating"

We need a commit message, guessing your motivation something like this
would be enough IMHO:

Make ndo_open less sensitive to memory pressure.

> Signed-off-by: Michael Trimarchi <[email protected]>
> ---
> drivers/net/ethernet/freescale/fec_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
> index 9f33ec838b52..09eb6ea9a584 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -3076,7 +3076,7 @@ fec_enet_alloc_rxq_buffers(struct net_device *ndev, unsigned int queue)
> rxq = fep->rx_queue[queue];
> bdp = rxq->bd.base;
> for (i = 0; i < rxq->bd.ring_size; i++) {
> - skb = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE);
> + skb = __netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE, GFP_KERNEL);
> if (!skb)
> goto err_alloc;
>

The patch LGTM, feel free to repost as non-RFC.