multipath blocking a single path making multipath -ll , lvm commands go to D state
I'm trying to troubleshoot a problem we had on RHEL 5.x (dm-mp 0.4.7.x).
When a path of a multipath'd device is in blocked state (echo blocked
> /sys/bus/sdX/device/state), multipath -ll, lvm (vgs, ...) go to D
state rendering the whole thing unresponsive (global wait ratio hitting
Tried to figure out if newer versions of dm-mp are affected, and tried
the same test on a fedora 12 box (dm-mp 0.4.9-6) and got the same
device timeout is set to 30, queue_depth is 16, multipath configuration
set to "no_path_retry fail".
Nothing in syslog or anything that could help
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