[Linux-cluster] gfs2_quotad:2498 blocked

Alan Brown ajb2 at mssl.ucl.ac.uk
Fri Mar 25 17:48:56 UTC 2011

Nicolas Ross wrote:

> It was a large, very large directory, with somewhere neer one million 
> small files, so the rsync took something like 3 to 4 hours. At some 
> point, all nodes' consoles dispalyed this :
> gfs2_quotad:2498 blocked for more that 120 seconds.
> "echo 0 > /proc/sys/kernel/hang_task_timeout_secs" disables this message.
> and then some debuging info dump.

> What does this mean ?

It means you're writing data faster than GFS can handle it, so it's 
pausing on you. We see this semi-regularly here on our clusters.

I suspect Bob Petersen's test kernel or patches from ~2-3 weeks ago will 
help you as these contain a bunch of fixes for slow writes.


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