linux-kernel - 2.6.27-rc5 nfs stall

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <vv3ib45u20ra8o8sc6cng5bd2drdqv733a@4ax.com>
Date:	Sat, 30 Aug 2008 19:28:11 +1000
From:	Grant Coady <grant_lkml@...o.com.au>
To:	linux-kernel@...r.kernel.org
Subject: 2.6.27-rc5 nfs stall - more info

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@...tree:~$ 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@...tree:~$ 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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/