http://bugzilla.kernel.org/show_bug.cgi?id=15095
Summary: ib_srp module removal triggers circular locking
complaint
Product: Drivers
Version: 2.5
Kernel Version: 2.6.33-rc3 (infiniband.git tree, for-next branch, last
commit dates from Thu Jan 14 12:23:37 2010 -0800)
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Infiniband/RDMA
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
Created an attachment (id=24662)
--> (http://bugzilla.kernel.org/attachment.cgi?id=24662)
Kernel log
Removing the ib_srp kernel module often (but not always) triggers a kernel
complaint about a possible circular locking dependency.
That complaint is triggered by the following script:
#!/bin/sh
while [ -e /sys/module/ib_srp ]
do
rmmod ib_srp || sleep 1
done
modprobe ib_srp "${1:-srp_sg_tablesize=128}"
ibsrpdm -c -d /dev/infiniband/umad0 \
| while read target_info
do
echo "${target_info}"
echo "${target_info}" > /sys/class/infiniband_srp/srp-mlx4_0-1/add_target
done
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