ipoib: Bound the number of egress mbufs buffered during pathrec lookups.
In pathological situations where the master subnet manager becomes unresponsive for an extended period, we may otherwise end up queuing all of the system's mbufs while waiting for a response to a path record lookup. This addresses the same issue as commit 1e85b806f9 in Linux. Reviewed by: cem, ngie MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division
This commit is contained in:
parent
2611037c1c
commit
49fe7b5029
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=303646
@ -660,7 +660,13 @@ ipoib_unicast_send(struct mbuf *mb, struct ipoib_dev_priv *priv, struct ipoib_he
|
||||
new_path = 1;
|
||||
}
|
||||
if (path) {
|
||||
_IF_ENQUEUE(&path->queue, mb);
|
||||
if (_IF_QLEN(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE)
|
||||
_IF_ENQUEUE(&path->queue, mb);
|
||||
else {
|
||||
if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
|
||||
m_freem(mb);
|
||||
}
|
||||
|
||||
if (!path->query && path_rec_start(priv, path)) {
|
||||
spin_unlock_irqrestore(&priv->lock, flags);
|
||||
if (new_path)
|
||||
|
Loading…
Reference in New Issue
Block a user