Bryn M. Reeves wrote:
I have a 2-node cluster with Open Shared Root on GFS on DRBD. A single
node mounts GFS OK and works, but after a while seems to just block
for disk.
[...]
State: D (disk sleep)
SleepAVG: 97%
[...]
You can find out what it's sleeping on either by via a sysrq or by
getting ps to display the wchan field of the stat data, e.g.:
ps ac -opid,comm,wchan
And see what symbol appears in the 3rd field.
And this is what comes out for all the stuck processes:
ps ax -opid,comm,wchan | grep ssh
9250 sshd -
9507 sshd gdlm_plock
9642 sshd gdlm_plock
They are all stuck in the gdlm_plock function. I figured it'd be
something like this. How do I debug this further?
Gordan
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