Re: 2.4.8 NFS Problems

Mike Black
2001-09-08T11:53:38Z

Did some more testing this A.M.

Soft Mount:
Took me several tries -- had to run a tiobench on the server side to
make for some I/O contention. Was able to get EIO error (since this is Sat
the system was pretty idle).
Hard Mount:
Unable to reproduce even though 10 second timeouts could be seen.
Soft Mount (retrans=5)
Unable to reproduce

Could be the interaction with ext3 where I/O gets bound up a while. Just
long enough to trigger the timeouts for a soft mount.
----- Original Message -----
From: "Trond Myklebust" <trond.myklebust@fys.uio.no>
To: "Mike Black" <mblack@csihq.com>
Cc: "linux-kernel" <linux-kernel@vger.kernel.org>
Sent: Saturday, September 08, 2001 6:53 AM
Subject: Re: 2.4.8 NFS Problems

> >>>>> " " == Mike Black <mblack@csihq.com> writes:
>
> > The file is being copied from yeti to picard. Last packet seen
> > is picard telling yeti "OK" after the commit. If soft timeouts
> > were occurring shouldn't we be seeing packets from yeti again
> > with no response from picard?
>
> You are assuming that the last packet seen is the one that corresponds
> to your read. In doing so, you are neglecting the fact that these are
> asynchronous reads, and that file readahead can muddle the waters for
> you.
>
> Look, this is getting us nowhere. The bottom line is: if you are able
> to reproduce the EIO on hard mounts it is a bug, and I'll be happy to
> help you trace it. If it is occuring only on soft mounts, it is user
> error...
>
> Cheers,
> Trond
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