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

From: Andrew Morton
Date: Sun Jul 30 2006 - 02:25:37 EST

On Sun, 30 Jul 2006 00:22:14 -0400
Trond Myklebust <trond.myklebust@xxxxxxxxxx> 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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