to remove unwanted things from linux kernel
 

hi
thanks 4 reply.
i want to improve the performance of linux thick server.how to find out the unwanted routines that are running in linux kernel.if i remove that routines/code wil it affect user level applications?how to do that?

When you say 'thick server' it is not really clear what you mean. I'm guessing you don't mean 'thick' as in 'stupid', so maybe you mean a 'server that works with thin clients'?? Or, maybe, its a mis-typing for fileserver?

Probably not appreciably. If I have guessed correctly, your user level applications will be on other computers. There are then several other things (network speed & latency, re-tries for network collision/other traffic on the network segment, disk I/O and disk formats), ram and swapping etc. that get in the way of perfect performance. If the kernel is not the bottleneck, then improving the kernel will have nearly no effect.

Many of the modules will be loadable modules and will not be loaded if not needed. Those will be causing essentially no performance degradation.

What data do you have on what your computer is doing now, which might give you a pointer towards areas in which performance tuning is likely to be of benefit? Which of the obvious performance measures have you taken so far?