[dm-devel] Changing features configuration on the fly possible?

[Gianluca Cecchi]

Hello,
having a definition in multipath.conf such as this

devices {
        device {
                vendor                  "NETAPP"
                product                 "LUN"
...
                features                "1 queue_if_no_path"
...
                hardware_handler        "1 alua"
...
        }

is it possible to change it to
devices {
        device {
                vendor                 "NETAPP"
                product                 "LUN"
...
                features                "0"
                no_path_retry           5
                hardware_handler        "1 alua"
...
        }

and get immediately on the fly the cnages with

multipath -v2 ?
Or are these changes that require a reboot?
If the answer is yes, can it be that a former blocked device not giving
back error because of its "queue" configuration, then after the change and
5 retries now gives error to the SCSI layer?

System is RH EL 5.8 with
kernel 2.6.18-308.24.1.el5
and
device-mapper-multipath-0.4.7-48.el5_8.1

Thanks in advance,
Gianluca
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