[linux-cifs-client] Slow Folder Traversal on One system, Fast on Another

[Tanthrix]

I tried with -o nounix and it too did not make any perceptible difference in
traversal time. So, I booted the older system off of the Ubuntu live cd
(same version that I used to setup my newer, slower machine) mounted the
share, and performed an ls -R a number of times. In each instance, it was
just as slow as my newer system. This pretty much rules out some sort of
hardware issue.

I will do as you suggested and get some captures from both systems, then
post them to see if that will yield some more information. Thanks.

On Mon, Jan 18, 2010 at 4:56 AM, Jeff Layton <jlayton at samba.org> wrote:

> On Mon, 18 Jan 2010 04:45:24 -0800
> Tanthrix <tanthrix at gmail.com> wrote:
>
> > Thanks very much for taking the time to reply.
> >
> > I just unmounted and remounted the share with -o noserverino, and it
> > unfortunately made no perceptible difference in the time it takes to
> > traverse. It still slowly spits out the list of files over 6-7 seconds
> while
> > my older system continues to take around 1/4 of a second.
> >
> > Do you think I should attempt using a different ethernet card just to
> rule
> > out the possibility of that being to blame? This is a newer system with
> an
> > Intel 82567V-2 Gigabit onboard; it's working fine otherwise, but it's
> just a
> > thought. I think I've got a trusty Realtek RTL8139 lying around somewhere
> > that I could pop in if you thought it would be a worthwhile use of time.
> >
> > Alternatively, I was thinking I might take the other system down and boot
> it
> > off my Ubuntu livecd. I could then mount the share, and see if it lists
> just
> > as fast when booting off of its regular drive with Arch installed. That
> > might shed some light whether it is some sort of hardware related issue.
> >
> > Thanks again.
> >
>
> Ok, good to check. Other than the change to server inode numbers, I'm
> not sure of any huge changes to the readdir code recently. You could
> try mounting with '-o nounix' to disable unix extensions. I'm not sure
> what the state of those was around 2.6.21.
>
> The more you can do to narrow it down, the better. If you can rule out
> hw changes, then you might get some wire captures while doing this on
> the old and new kernels and look for the differences there.
>
> --
> Jeff Layton <jlayton at samba.org>
>
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