linux/net/iucv
Hendrik Brueckner 3fa6b5adbe af_iucv: Fix race when queuing incoming iucv messages
AF_IUCV runs into a race when queuing incoming iucv messages
and receiving the resulting backlog.

If the Linux system is under pressure (high load or steal time),
the message queue grows up, but messages are not received and queued
onto the backlog queue. In that case, applications do not
receive any data with recvmsg() even if AF_IUCV puts incoming
messages onto the message queue.

The race can be avoided if the message queue spinlock in the
message_pending callback is spreaded across the entire callback
function.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-04-21 23:43:15 -07:00
..
Kconfig [AF_IUCV]: Improve description of IUCV and AFIUCV configuration options. 2007-07-14 19:03:00 -07:00
Makefile [S390]: Add AF_IUCV socket support 2007-02-08 13:51:54 -08:00
af_iucv.c af_iucv: Fix race when queuing incoming iucv messages 2009-04-21 23:43:15 -07:00
iucv.c s390: remove s390_root_dev_*() 2009-01-06 10:44:34 -08:00