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authorMike Marciniszyn <mike.marciniszyn@intel.com>2016-05-12 19:23:28 +0200
committerDoug Ledford <dledford@redhat.com>2016-05-14 01:39:17 +0200
commitcdbff5042d69bbe3f9840bea03863c93f93c88fa (patch)
tree1abddfb43165a33c44229f3b8de91d714ce3f63c /drivers/infiniband
parentIB/hfi1: Fix hfi_rcvhdr tracepoint (diff)
downloadlinux-cdbff5042d69bbe3f9840bea03863c93f93c88fa.tar.xz
linux-cdbff5042d69bbe3f9840bea03863c93f93c88fa.zip
IB/rdmavt: Increase CQ callback thread priority
The priority of the send engines is higher than the CQ completion thread potentially causing completions to be starved for very fast interfaces. Change the CQ kthread to match the send engine threads to minimize this delay for ULP completion processing. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/sw/rdmavt/cq.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rdmavt/cq.c b/drivers/infiniband/sw/rdmavt/cq.c
index b1ffc8b4a6c0..6ca6fa80dd6e 100644
--- a/drivers/infiniband/sw/rdmavt/cq.c
+++ b/drivers/infiniband/sw/rdmavt/cq.c
@@ -525,6 +525,7 @@ int rvt_driver_cq_init(struct rvt_dev_info *rdi)
return PTR_ERR(task);
}
+ set_user_nice(task, MIN_NICE);
cpu = cpumask_first(cpumask_of_node(rdi->dparms.node));
kthread_bind(task, cpu);
wake_up_process(task);