Michael S. Tsirkin ec56dc0b7f IPoIB/cm: Fix performance regression on Mellanox ... commit 518b1646 ("IPoIB/cm: Fix SRQ WR leak") introduced a severe performance regression on Mellanox cards, because keeping a QP in the error state for extended periods of time moves hardware to the slow path (until the QP is destroyed). For example, MPI latency goes from ~3 usecs to ~7 usecs. Fix this by posting a send WR on one of the QPs that are being flushed, instead of using a separate drain QP that is kept in the error state. This fixes bug <https://bugs.openfabrics.org/show_bug.cgi?id=636>, reported and bisected by Scott Weitzenkamp at Cisco and debugged by Sasha Mikheev at Voltaire. Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>		2007-05-29 16:07:09 -07:00
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core	Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband	2007-05-21 16:19:32 -07:00
hw	IB/mthca: Fix handling of send CQE with error for QPs connected to SRQ	2007-05-29 16:07:09 -07:00
ulp	IPoIB/cm: Fix performance regression on Mellanox	2007-05-29 16:07:09 -07:00
Kconfig	[S390] Kconfig: menus with depends on HAS_IOMEM.	2007-05-10 15:46:07 +02:00
Makefile	IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters	2007-05-08 18:00:38 -07:00