Zero-copy patch

Jeremy Allison jra at
Tue Feb 1 10:58:11 MST 2011

On Tue, Feb 01, 2011 at 09:03:06AM -0500, Jacky Lam wrote:
> I am curious about that as well. But I have double check most of the time spending while writing to samba server is that two splice call. And the kernel profile is showing that __copy_user() is using 25% CPU time during that period of time.
> I don't know if it is platform dependent problem.....have you try to turn on splice and do a kernel profiling?

Please do and let us know why it isn't working right.
I can help bug the kernel devs to look at it.

FYI for everyone else, I've sent Jacky the kernel
patch to test off-list.


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