Hi
All,
I take part in the
development of SRP (Scsi RDMA Protocol). and I'm trying to work with dm
to support failover.
I downloaded
multipath 0.4.7 and I'm working with linux-2.6.18-rc1 kernel over RHAS4.OU3
distribution.
I have
connected to the SRP target (That has a lot of disks), and they can be
accessed through /dev/sdb /dev/sdc and so on. I run multipath and got the
mapping as it should be.
The problem is
that the reference count of ib_srp module is equal to the
number of disks that were mapped using multipath. Because of that I can not
remove the ib_srp module.
This does not occur
without multipath.
There is also
reference count of 1 on dm_round_robin.
I tried to look at
"ps aux" and "lsof" but found no process or file that should hold reference to
ib_srp. I tried to google it without any success.
Can someone answer
any of the following questions:
1) Why does every
disk that is mapped through multipath hold a reference to the ib_srp
module? Is this the correct behavior, or is it a bug?
2) Can I remove a
mapping from the multipath ?
3) Any ideas how I
can debug this.
I will appreciate
any help.
Thanks
Ishai
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