[cifs-protocol] Re: [linux-cifs-client] Linux CIFS performance

Jeremy Allison jra at samba.org
Wed Mar 7 18:45:49 GMT 2007

On Wed, Mar 07, 2007 at 12:41:38PM -0600, Steve French wrote:
> After looking at a few posts complaining about Linux cifs performance
> vs. nfs, Shaggy and I looked at some traces, and Shaggy spotted
> something very important.   CIFS was rereading a page in one case in
> which it did not need to, and not marking a page up to date in one place
> (causing unnecessary i/o).   The result was a 20 to 30x improvement in
> iozone write/rewrite performance - it does not affect read performance
> or the other four write cases in iozone (or if so, not very much).

Great work Steve ! Can you check the changes into the
linux-converged-for-old-kernels branch please so I can
play with this :-).



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