How to disable read and write caching in filesystems
 

Hi,
i am trying to disable read and write caching for ext3 filesystem. I wanted to know is there any user-space method to do so. Also if anyone can give me a approach on hoe it can be done.

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When you mount filesystem, do so with sync option. If already mounted, you need to set also the remount option, like:
mount -o remount,sync /mnt/fs

When doing this from a C program, the flags to use are MS_REMOUNT (if your iflesystem is already mounted) and MS_SYNCHRONOUS.