diff options
| author | Sudarsana Reddy Kalluru <sudarsana.kalluru@cavium.com> | 2018-07-01 20:03:05 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-22 14:27:37 +0200 |
| commit | 0b796049605886c51dc12a646e7de8e39fa1aedf (patch) | |
| tree | 202fa8c408c73e26f8e044b405f2d340044fc4e7 | |
| parent | a648a4636d17810f008529ec181af932cf4684b7 (diff) | |
qed: Limit msix vectors in kdump kernel to the minimum required count.
[ Upstream commit bb7858ba1102f82470a917e041fd23e6385c31be ]
Memory size is limited in the kdump kernel environment. Allocation of more
msix-vectors (or queues) consumes few tens of MBs of memory, which might
lead to the kdump kernel failure.
This patch adds changes to limit the number of MSI-X vectors in kdump
kernel to minimum required value (i.e., 2 per engine).
Fixes: fe56b9e6a ("qed: Add module with basic common support")
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed_main.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c index 0b949c6d83fc..f36bd0bd37da 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_main.c +++ b/drivers/net/ethernet/qlogic/qed/qed_main.c @@ -23,6 +23,7 @@ #include <linux/vmalloc.h> #include <linux/qed/qed_if.h> #include <linux/qed/qed_ll2_if.h> +#include <linux/crash_dump.h> #include "qed.h" #include "qed_sriov.h" @@ -701,6 +702,14 @@ static int qed_slowpath_setup_int(struct qed_dev *cdev, /* We want a minimum of one slowpath and one fastpath vector per hwfn */ cdev->int_params.in.min_msix_cnt = cdev->num_hwfns * 2; + if (is_kdump_kernel()) { + DP_INFO(cdev, + "Kdump kernel: Limit the max number of requested MSI-X vectors to %hd\n", + cdev->int_params.in.min_msix_cnt); + cdev->int_params.in.num_vectors = + cdev->int_params.in.min_msix_cnt; + } + rc = qed_set_int_mode(cdev, false); if (rc) { DP_ERR(cdev, "qed_slowpath_setup_int ERR\n"); |