UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

i40e: limit lan queue count in large CPU count machine 

When a machine has more CPUs than queue pairs, e.g. 512 cores, the
counting gets a little funky and turns off Flow Director with the
message:
  not enough queues for Flow Director. Flow Director feature is disabled

This patch limits the number of lan queues initially allocated to
be sure we have some left for FD and other features.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Shannon Nelson 2017-07-24 18:17:42 -07:00 committed by Jeff Kirsher
parent 1dd236fda0
commit e50d5751c8
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -11093,6 +11093,7 @@ static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
static void i40e_determine_queue_usage(struct i40e_pf *pf)
{
int queues_left;
int q_max;
pf->num_lan_qps = 0;
@ -11139,10 +11140,12 @@ static void i40e_determine_queue_usage(struct i40e_pf *pf)
I40E_FLAG_DCB_ENABLED);
dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
}
pf->num_lan_qps = max_t(int, pf->rss_size_max,
num_online_cpus());
pf->num_lan_qps = min_t(int, pf->num_lan_qps,
pf->hw.func_caps.num_tx_qp);
/* limit lan qps to the smaller of qps, cpus or msix */
q_max = max_t(int, pf->rss_size_max, num_online_cpus());
q_max = min_t(int, q_max, pf->hw.func_caps.num_tx_qp);
q_max = min_t(int, q_max, pf->hw.func_caps.num_msix_vectors);
pf->num_lan_qps = q_max;
queues_left -= pf->num_lan_qps;
}