2021-03-04 14:36:20

by Coiby Xu

[permalink] [raw]
Subject: [PATCH v1 2/3] i40e: use minimal rx and tx ring buffers for kdump

Use the minimum of the number of descriptors thus we will allocate the
minimal ring buffers for kdump.

Signed-off-by: Coiby Xu <[email protected]>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 77bf8c392750..d6868c7aee05 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -11029,6 +11029,11 @@ static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
return -ENODATA;
}

+ if (is_kdump_kernel()) {
+ vsi->num_tx_desc = I40E_MIN_NUM_DESCRIPTORS;
+ vsi->num_rx_desc = I40E_MIN_NUM_DESCRIPTORS;
+ }
+
return 0;
}

--
2.30.1


2021-04-22 21:01:00

by Switzer, David

[permalink] [raw]
Subject: RE: [PATCH v1 2/3] i40e: use minimal rx and tx ring buffers for kdump


>-----Original Message-----
>From: Coiby Xu <[email protected]>
>Sent: Wednesday, March 3, 2021 6:56 PM
>To: [email protected]
>Cc: [email protected]; [email protected]; Jakub Kicinski
><[email protected]>; Brandeburg, Jesse <[email protected]>; Nguyen,
>Anthony L <[email protected]>; David S. Miller
><[email protected]>; open list <[email protected]>
>Subject: [PATCH v1 2/3] i40e: use minimal rx and tx ring buffers for kdump
>
>Use the minimum of the number of descriptors thus we will allocate the minimal
>ring buffers for kdump.
>
>Signed-off-by: Coiby Xu <[email protected]>
>---
> drivers/net/ethernet/intel/i40e/i40e_main.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
Tested-by: Dave Switzer <[email protected]>