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Date: Thu, 28 Jan 2021 15:44:03 +0100
From: Antoine Tenart <atenart@...nel.org>
To: davem@...emloft.net, kuba@...nel.org, alexander.duyck@...il.com
Cc: Antoine Tenart <atenart@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH net-next 09/11] net: remove the xps possible_mask
Remove the xps possible_mask. It was an optimization but we can just
loop from 0 to nr_ids now that it is embedded in the xps dev_maps. That
simplifies the code a bit.
Suggested-by: Alexander Duyck <alexander.duyck@...il.com>
Signed-off-by: Antoine Tenart <atenart@...nel.org>
---
net/core/dev.c | 43 ++++++++++++++-----------------------------
net/core/net-sysfs.c | 14 +++-----------
2 files changed, 17 insertions(+), 40 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index c639761ddb5e..d487605d6992 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2504,33 +2504,27 @@ static void reset_xps_maps(struct net_device *dev,
kfree_rcu(dev_maps, rcu);
}
-static void clean_xps_maps(struct net_device *dev, const unsigned long *mask,
+static void clean_xps_maps(struct net_device *dev,
struct xps_dev_maps *dev_maps, u16 offset, u16 count,
bool is_rxqs_map)
{
- unsigned int nr_ids = dev_maps->nr_ids;
bool active = false;
int i, j;
- for (j = -1; j = netif_attrmask_next(j, mask, nr_ids), j < nr_ids;)
- active |= remove_xps_queue_cpu(dev, dev_maps, j, offset,
- count);
+ for (j = 0; j < dev_maps->nr_ids; j++)
+ active |= remove_xps_queue_cpu(dev, dev_maps, j, offset, count);
if (!active)
reset_xps_maps(dev, dev_maps, is_rxqs_map);
- if (!is_rxqs_map) {
- for (i = offset + (count - 1); count--; i--) {
+ if (!is_rxqs_map)
+ for (i = offset + (count - 1); count--; i--)
netdev_queue_numa_node_write(
- netdev_get_tx_queue(dev, i),
- NUMA_NO_NODE);
- }
- }
+ netdev_get_tx_queue(dev, i), NUMA_NO_NODE);
}
static void netif_reset_xps_queues(struct net_device *dev, u16 offset,
u16 count)
{
- const unsigned long *possible_mask = NULL;
struct xps_dev_maps *dev_maps;
if (!static_key_false(&xps_needed))
@@ -2542,17 +2536,14 @@ static void netif_reset_xps_queues(struct net_device *dev, u16 offset,
if (static_key_false(&xps_rxqs_needed)) {
dev_maps = xmap_dereference(dev->xps_rxqs_map);
if (dev_maps)
- clean_xps_maps(dev, possible_mask, dev_maps, offset,
- count, true);
+ clean_xps_maps(dev, dev_maps, offset, count, true);
}
dev_maps = xmap_dereference(dev->xps_cpus_map);
if (!dev_maps)
goto out_no_maps;
- if (num_possible_cpus() > 1)
- possible_mask = cpumask_bits(cpu_possible_mask);
- clean_xps_maps(dev, possible_mask, dev_maps, offset, count, false);
+ clean_xps_maps(dev, dev_maps, offset, count, false);
out_no_maps:
mutex_unlock(&xps_map_mutex);
@@ -2627,8 +2618,8 @@ static void xps_copy_dev_maps(struct xps_dev_maps *dev_maps,
int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
u16 index, bool is_rxqs_map)
{
- const unsigned long *online_mask = NULL, *possible_mask = NULL;
struct xps_dev_maps *dev_maps, *new_dev_maps = NULL;
+ const unsigned long *online_mask = NULL;
bool active = false, copy = false;
int i, j, tci, numa_node_id = -2;
int maps_sz, num_tc = 1, tc = 0;
@@ -2658,10 +2649,8 @@ int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
nr_ids = dev->num_rx_queues;
} else {
maps_sz = XPS_CPU_DEV_MAPS_SIZE(num_tc);
- if (num_possible_cpus() > 1) {
+ if (num_possible_cpus() > 1)
online_mask = cpumask_bits(cpu_online_mask);
- possible_mask = cpumask_bits(cpu_possible_mask);
- }
dev_maps = xmap_dereference(dev->xps_cpus_map);
nr_ids = nr_cpu_ids;
}
@@ -2711,8 +2700,7 @@ int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
static_key_slow_inc_cpuslocked(&xps_rxqs_needed);
}
- for (j = -1; j = netif_attrmask_next(j, possible_mask, nr_ids),
- j < nr_ids;) {
+ for (j = 0; j < nr_ids; j++) {
bool skip_tc = false;
tci = j * num_tc + tc;
@@ -2753,8 +2741,7 @@ int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
if (!dev_maps)
goto out_no_old_maps;
- for (j = -1; j = netif_attrmask_next(j, possible_mask, nr_ids),
- j < nr_ids;) {
+ for (j = 0; j < nr_ids; j++) {
for (i = num_tc, tci = j * dev_maps->num_tc; i--; tci++) {
map = xmap_dereference(dev_maps->attr_map[tci]);
if (!map)
@@ -2788,8 +2775,7 @@ int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
goto out_no_maps;
/* removes tx-queue from unused CPUs/rx-queues */
- for (j = -1; j = netif_attrmask_next(j, possible_mask, nr_ids),
- j < nr_ids;) {
+ for (j = 0; j < nr_ids; j++) {
tci = j * dev_maps->num_tc;
for (i = 0; i < dev_maps->num_tc; i++, tci++) {
@@ -2812,8 +2798,7 @@ int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
return 0;
error:
/* remove any maps that we added */
- for (j = -1; j = netif_attrmask_next(j, possible_mask, nr_ids),
- j < nr_ids;) {
+ for (j = 0; j < nr_ids; j++) {
for (i = num_tc, tci = j * num_tc; i--; tci++) {
new_map = xmap_dereference(new_dev_maps->attr_map[tci]);
map = copy ?
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 5b7123d3b66f..0c564f288460 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1318,10 +1318,8 @@ static const struct attribute_group dql_group = {
static int xps_queue_show(struct net_device *dev, unsigned long **mask,
unsigned int index, bool is_rxqs_map)
{
- const unsigned long *possible_mask = NULL;
struct xps_dev_maps *dev_maps;
int j, tc = 0, ret = 0;
- unsigned int nr_ids;
tc = netdev_txq_to_tc(dev, index);
if (tc < 0)
@@ -1329,20 +1327,14 @@ static int xps_queue_show(struct net_device *dev, unsigned long **mask,
rcu_read_lock();
- if (is_rxqs_map) {
+ if (is_rxqs_map)
dev_maps = rcu_dereference(dev->xps_rxqs_map);
- } else {
+ else
dev_maps = rcu_dereference(dev->xps_cpus_map);
- if (num_possible_cpus() > 1)
- possible_mask = cpumask_bits(cpu_possible_mask);
- }
if (!dev_maps || tc >= dev_maps->num_tc)
goto rcu_unlock;
- nr_ids = dev_maps->nr_ids;
-
- for (j = -1; j = netif_attrmask_next(j, possible_mask, nr_ids),
- j < nr_ids;) {
+ for (j = 0; j < dev_maps->nr_ids; j++) {
int i, tci = j * dev_maps->num_tc + tc;
struct xps_map *map;
--
2.29.2
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