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author | Toke Høiland-Jørgensen <toke@redhat.com> | 2019-01-09 17:09:43 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2019-01-15 20:12:00 -0800 |
commit | 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea (patch) | |
tree | 29e8d6fccf9da0a9c19129f477a0ef0ae244464d /lib/argv_split.c | |
parent | f6bab199315b70fd83fe3ee0947bc84c7a35f3d4 (diff) | |
download | linux-37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea.tar.bz2 |
sched: Fix detection of empty queues in child qdiscs
Several qdiscs check on enqueue whether the packet was enqueued to a class
with an empty queue, in which case the class is activated. This is done by
checking if the qlen is exactly 1 after enqueue. However, if GSO splitting
is enabled in the child qdisc, a single packet can result in a qlen longer
than 1. This means the activation check fails, leading to a stalled queue.
Fix this by checking if the queue is empty *before* enqueue, and running
the activation logic if this was the case.
Reported-by: Pete Heist <pete@heistp.net>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/argv_split.c')
0 files changed, 0 insertions, 0 deletions