From 7e3f2952eeb1a0fe2aa9882fd1705a88f9d89b35 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Tue, 11 May 2010 15:11:11 -0700 Subject: rds: don't let RDS shutdown a connection while senders are present This is the first in a long line of patches that tries to fix races between RDS connection shutdown and RDS traffic. Here we are maintaining a count of active senders to make sure the connection doesn't go away while they are using it. Signed-off-by: Chris Mason --- net/rds/message.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'net/rds/message.c') diff --git a/net/rds/message.c b/net/rds/message.c index 96e2bf7dc77e..84f937f11d47 100644 --- a/net/rds/message.c +++ b/net/rds/message.c @@ -81,7 +81,10 @@ static void rds_message_purge(struct rds_message *rm) void rds_message_put(struct rds_message *rm) { rdsdebug("put rm %p ref %d\n", rm, atomic_read(&rm->m_refcount)); - + if (atomic_read(&rm->m_refcount) == 0) { +printk(KERN_CRIT "danger refcount zero on %p\n", rm); +WARN_ON(1); + } if (atomic_dec_and_test(&rm->m_refcount)) { BUG_ON(!list_empty(&rm->m_sock_item)); BUG_ON(!list_empty(&rm->m_conn_item)); -- cgit v1.2.3-70-g09d2