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authorPaolo Abeni <pabeni@redhat.com>2019-04-10 14:32:41 +0200
committerDavid S. Miller <davem@davemloft.net>2019-04-10 12:20:46 -0700
commit73eb628ddfd3884d1e58a8022de2e78de7807fc6 (patch)
treef9963afb03df6761396729cfad94621e7d3d5ab0 /net/core/gen_stats.c
parent8a53e616de294873fec1a75ddb77ecb3d225cee0 (diff)
Revert: "net: sched: put back q.qlen into a single location"
This revert commit 46b1c18f9deb ("net: sched: put back q.qlen into a single location"). After the previous patch, when a NOLOCK qdisc is enslaved to a locking qdisc it switches to global stats accounting. As a consequence, when a classful qdisc accesses directly a child qdisc's qlen, such qdisc is not doing per CPU accounting and qlen value is consistent. In the control path nobody uses directly qlen since commit e5f0e8f8e45 ("net: sched: introduce and use qdisc tree flush/purge helpers"), so we can remove the contented atomic ops from the datapath. v1 -> v2: - complete the qdisc_qstats_atomic_qlen_dec() -> qdisc_qstats_cpu_qlen_dec() replacement, fix build issue - more descriptive commit message Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/gen_stats.c')
-rw-r--r--net/core/gen_stats.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/gen_stats.c b/net/core/gen_stats.c
index ac679f74ba47..9bf1b9ad1780 100644
--- a/net/core/gen_stats.c
+++ b/net/core/gen_stats.c
@@ -291,6 +291,7 @@ __gnet_stats_copy_queue_cpu(struct gnet_stats_queue *qstats,
for_each_possible_cpu(i) {
const struct gnet_stats_queue *qcpu = per_cpu_ptr(q, i);
+ qstats->qlen = 0;
qstats->backlog += qcpu->backlog;
qstats->drops += qcpu->drops;
qstats->requeues += qcpu->requeues;
@@ -306,6 +307,7 @@ void __gnet_stats_copy_queue(struct gnet_stats_queue *qstats,
if (cpu) {
__gnet_stats_copy_queue_cpu(qstats, cpu);
} else {
+ qstats->qlen = q->qlen;
qstats->backlog = q->backlog;
qstats->drops = q->drops;
qstats->requeues = q->requeues;