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FromGrant Coady <>
Subject2.6.27-rc5 nfs stall - more info
DateSat, 30 Aug 2008 19:28:11 +1000
Hi there,

Had another stall, server running 2.6.24.7, clients running 2.6.27-rc5.

On the server the netstat -t gave during stall:

grant@deltree:~$ netstat -t
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 localhost:50087         localhost:4743          ESTABLISHED
tcp        0     52 deltree.mire.mine.n:ssh sillywin.mire.mine:3052 ESTABLISHED
tcp        0      0 deltree.mire.mine.n:ssh sillywin.mire.mine:3051 ESTABLISHED
tcp        0      0 deltree.mire.mine.n:ssh sillywin.mire.mine:1056 ESTABLISHED
tcp        0      0 localhost:4743          localhost:50087         ESTABLISHED


after stall, shows the delay seems to be in making the NFS connection:
grant@deltree:~$ netstat -t
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 localhost:50087         localhost:4743          ESTABLISHED
tcp        0      0 deltree.mire.mine.n:ssh sillywin.mire.mine:3052 ESTABLISHED
tcp        0      0 deltree.mire.mine.n:ssh sillywin.mire.mine:3051 ESTABLISHED
tcp        0      0 deltree.mire.mine.n:ssh sillywin.mire.mine:1056 ESTABLISHED
tcp        0      0 localhost:4743          localhost:50087         ESTABLISHED
tcp        0      0 deltree.mire.mine.:nfsd pooh.mire.mine.nu:rtip  ESTABLISHED


On 'pooh', I opened a new root terminal and run a command from nfs 
export from deltree, this is when the stall happened, pooh had been 
up for about five hours, this from /var/log/messages:
Aug 30 19:10:21 pooh sshd[2615]: Accepted publickey for root from 192.168.1.36 port 1246 ssh2


Just before doing that I'd told 'tosh' to halt via ssh terminal 
and the server recorded in /var/log/messages:
Aug 30 19:11:03 deltree mountd[573]: authenticated unmount request from tosh.mire.mine.nu:680 for /home/common (/home/common)

Just coincidence?
.config + dmesg for the clients (.27-rc5a):
  http://bugsplatter.id.au/kernel/boxen/pooh/
  http://bugsplatter.id.au/kernel/boxen/toshi/
server (.24.7a):
  http://bugsplatter.id.au/kernel/boxen/deltree/

Grant.


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