linux-kernel - Re: [PATCH for 2.6.18] [8/8] MM: Remove rogue readahead printk

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Date:	Sat, 29 Jul 2006 23:26:25 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	nate.diller@...il.com, ak@...e.de, torvalds@...l.org,
	discuss@...-64.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH for 2.6.18] [8/8] MM: Remove rogue readahead printk

On Sun, 30 Jul 2006 00:22:14 -0400
Trond Myklebust <trond.myklebust@....uio.no> wrote:

> > of course, it could be that some quirk of the NFS client VFS interface
> > causes "spurious" -EIO returns.  either way, i'd rather see it fixed
> > rather than the printk removed, since it is useful to point out that
> > some performance degradation is occuring.
> 
> We have no way of telling. That printk doesn't give us any useful
> information whatsoever for debugging that sort of problem. It should
> either be replaced with something that does, or it should be thrown out.

err, the printk has found a probable bug in NFS.  That was pretty useful
of it.

Do we know why nfs's readpage isn't bringing the page up to date?
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