Mike Marciniszyn 3d2e7424b3 IPoIB: Fix send lockup due to missed TX completion ... commit 1ee9e2aa7b upstream. Commit f0dc117abd ("IPoIB: Fix TX queue lockup with mixed UD/CM traffic") attempts to solve an issue where unprocessed UD send completions can deadlock the netdev. The patch doesn't fully resolve the issue because if more than half the tx_outstanding's were UD and all of the destinations are RC reachable, arming the CQ doesn't solve the issue. This patch uses the IB_CQ_REPORT_MISSED_EVENTS on the ib_req_notify_cq(). If the rc is above 0, the UD send cq completion callback is called directly to re-arm the send completion timer. This issue is seen in very large parallel filesystem deployments and the patch has been shown to correct the issue. Reviewed-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-03-28 12:12:25 -07:00
..
core	infiniband: pass rdma_cm module to netlink_dump_start	2012-10-28 10:14:15 -07:00
hw	RDMA/nes: Fix for terminate timer crash	2013-01-17 08:50:51 -08:00
ulp	IPoIB: Fix send lockup due to missed TX completion	2013-03-28 12:12:25 -07:00
Kconfig	ib_srpt: Initial SRP Target merge for v3.3-rc1	2011-12-16 06:33:56 +00:00
Makefile	ib_srpt: Initial SRP Target merge for v3.3-rc1	2011-12-16 06:33:56 +00:00