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Date: Sun, 10 Dec 2006 02:06:49 -0800 (PST)
From: Amit Choudhary <amit2030@yahoo.com>
Subject: [PATCH] [DISCUSS] Optimizing linux applications with the help of the kernel.
To: Linux Kernel <linux-kernel@vger.kernel.org>
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Hi All,

I just had an idea for improving the performance of linux applications with some help from the
kernel. Let's say that I have to make a copy of a file. So, I read the input file into a buffer
and then write the buffer to the output file.

In both these cases the same data is coming from kernel_to_user and then from user_to_kernel. If
this can be short-circuited, that is, from kernel_to_kernel then the performance can be increased
a lot.

The psuedocode would be:

fd_inp = open _output_file
fd_out = open _input_file
instruct_kernel to write next data read from fd_inp to fd_out
read fd_out

The same mechanism can be applied to many other scenarios.
May be whatever I am thinking is wrong or involves lot of complexities but this is just a thought.

Regards,
Amit


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