Re: Crash when unmounting NFS/TCP with -f

From: Bill Davidsen
Date: Mon Apr 25 2005 - 11:54:56 EST

Brice Goglin wrote:
Hi Trond,

I'm using NFS (v2) over TCP (in a SSH tunnel).
Each time the SSH dies before a umount NFS, I have to umount -f
and I get a crash (only sysrq works).
Actually, the crash occurs a few seconds after umount -f.

It seems that killing SSH by hand does _not_ lead to crash.
But a long network failure does.
I remember seeing this bug several times with all stable releases
from 2.6.7 to 2.6.11. I didn't try with earlier versions.

I didn't see anything in the logs (after reboot). But I can't be sure
there was nothing in dmesg since I didn't get a chance to chvt 1 and
see console messages before rebooting (with sysrq).

Do you have any idea how to debug this ?

No clue, but a question: is this a hard or soft mount? Could you post your ssh and mount commands, munged as needed for security? That might give someone a clue.

I did this "back when" but I don't recall having a problem with it.

-bill davidsen (davidsen@xxxxxxx)
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at