Re: hang with 2.4.26 copying to loopback device

[Marcelo Tosatti]

On Mon, May 03, 2004 at 10:44:05PM +0100, Julian Bradfield wrote:
> I'm running a vanilla 2.4.26 kernel (on a rather old distro, Mandrake
> 9.0).
> I have large (6GB) file on a remote NFS server (running 2.4.18), on
> which
> there is a file system that I'm mounting via loopback.
> When I copy to this looped back filesystem, I get a hang after a few
> megabytes. After the copy hangs, I move the cursor around and soon X
> freezes as well. I can, however, reboot via sysrq.
> 
> I've seen several reports a couple of years ago of deadlocks in
> loopback, but nothing recently that I can find via searching.
> Is there anything currently known to be an issue, or should I start
> preparing a proper report?

Please prepare a more complete report with alt+sysrq+p and alt+sysrq+t 
output if possible. Attaching a serial console to the box is 
very helpful if you dont want to copy the output by hand.
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