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PIPE questions for Linux 2.4 setup

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From: Ad van den Broek <advandenbroek.nl@...>
To: <linux-c-programming@...>
Subject: PIPE questions for Linux 2.4 setup
Date: Thursday, May 21, 2009 - 10:56 am

Dear C/Linux friends,


We wanted to increase PIPE_SIZE (from 4K to 8K on linux 2.4 on an AMD

LX800 system).

The result is a segmentation error as soon as Read() is reading more

data than 4K

from the pipe.

So pipe data seems to be damaged.

If we change PIPE_SIZE back tot 4K everything is running fine.

Question-1: Any suggestion to prevent this segmentation error ?


* PIPE_SIZE

If you look in the linux kernel code for PIPE_SIZE

("include/linux/pipe_fs_i.h") you find:

#define PIPE_SIZE PAGE_SIZE

I don't know if #define PIPE_SIZE PAGE_SIZE is necessary or just a

simple shortcut.

Question-2: Is it OK if PIPE_SIZE > PAGE_SIZE ?


* PAGE_SIZE

Question-3: Is it OK to increase Page_size on linux 2.4 on AMD LX800 system ?

Which aspects are limiting the user to config the PAGE_SIZE ?


-- 


With best regards,

Ad van den Broek

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