openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

net: mvpp2: make sure we don't spread load on disabled CPUs 

When filling the RSS table, we have to make sure that the rx queue is
attached to an online CPU.

This patch is not a full support for cpu_hotplug, but rather a way to
make sure that we don't break network on system booted with the maxcpus
parameter.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxime Chevallier 2018-07-12 13:54:22 +02:00 committed by David S. Miller
parent 662ae3fe65
commit 2a2f467daf
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
View File

@ -109,11 +109,17 @@ void mvpp2_cls_oversize_rxq_set(struct mvpp2_port *port)
static inline u32 mvpp22_rxfh_indir(struct mvpp2_port *port, u32 rxq)
{
int nrxqs, cpus = num_possible_cpus();
int nrxqs, cpu, cpus = num_possible_cpus();
/* Number of RXQs per CPU */
nrxqs = port->nrxqs / cpus;
/* CPU that will handle this rx queue */
cpu = rxq / nrxqs;
if (!cpu_online(cpu))
return port->first_rxq;
/* Indirection to better distribute the paquets on the CPUs when
* configuring the RSS queues.
*/