]> git.baikalelectronics.ru Git - kernel.git/commit
tipc: purge backlog queue counters when broadcast link is reset
authorJon Paul Maloy <jon.maloy@ericsson.com>
Sun, 28 Jun 2015 13:44:44 +0000 (09:44 -0400)
committerDavid S. Miller <davem@davemloft.net>
Sun, 28 Jun 2015 23:43:02 +0000 (16:43 -0700)
commitb3514b13c5beda105f027a450b27abda310c46f7
treed6edc29ed8d4d0d4314e7249486a48b4f2ae5267
parenta225efe1ff7615689f6ef77f73c2c5f9fb743471
tipc: purge backlog queue counters when broadcast link is reset

In commit 162f8514b63052dedb09556a07e75bdbab33aff4
("tipc: introduce starvation free send algorithm")
we introduced a counter per priority level for buffers
in the link backlog queue. We also introduced a new
function tipc_link_purge_backlog(), to reset these
counters to zero when the link is reset.

Unfortunately, we missed to call this function when
the broadcast link is reset, with the result that the
values of these counters might be permanently skewed
when new nodes are attached. This may in the worst case
lead to permananent, but spurious, broadcast link
congestion, where no broadcast packets can be sent at
all.

We fix this bug with this commit.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/tipc/bcast.c
net/tipc/link.c
net/tipc/link.h